CODATA System

Namespace: mp_units::codata

Module: mp_units.systems

Header: <mp-units/systems/codata.h>

Secondary Headers:

• <mp-units/systems/codata/adopted_values.h>
• <mp-units/systems/codata/codata2014.h>
• <mp-units/systems/codata/codata2014_essential.h>
• <mp-units/systems/codata/codata2018.h>
• <mp-units/systems/codata/codata2018_essential.h>
• <mp-units/systems/codata/codata2022.h>
• <mp-units/systems/codata/codata2022_essential.h>
• <mp-units/systems/codata/math_constants.h>

Units

Unit Name	Symbol	unit_symbol	Definition
codata2014::speed_of_light_in_vacuum	—	—	alias to si::si2019::speed_of_light_in_vacuum
codata2018::avogadro_constant	—	—	alias to si::si2019::avogadro_constant
codata2018::boltzmann_constant	—	—	alias to si::si2019::boltzmann_constant
codata2018::elementary_charge	—	—	alias to si::si2019::elementary_charge
codata2018::hyperfine_structure_transition_frequency_of_cs	—	—	alias to si::si2019::hyperfine_structure_transition_frequency_of_cs
codata2018::luminous_efficacy	—	—	alias to si::si2019::luminous_efficacy
codata2018::planck_constant	—	—	alias to si::si2019::planck_constant
codata2018::speed_of_light_in_vacuum	—	—	alias to si::si2019::speed_of_light_in_vacuum

Constants

Name	Symbol	unit_symbol	Definition	Standard uncertainty
avogadro_constant	N_A	—	alias to si::si2019::avogadro_constant	—
boltzmann_constant	k	—	alias to si::si2019::boltzmann_constant	—
codata2014::alpha_particle_electron_mass_ratio	alpha_particle_electron_mass_ratio	—	mag_ratio<729'429'954'136, 100'000'000> * one	mag_ratio<24, 10> * mag_power<10, -7> * one
codata2014::alpha_particle_mass	m_α (m_alpha)	—	mag_ratio<6'644'657'230, 1'000'000'000> * mag_power<10, -27> * si::kilogram	mag_ratio<82, 10> * mag_power<10, -35> * si::kilogram
codata2014::alpha_particle_molar_mass	alpha_particle_molar_mass	—	mag_ratio<4'001'506'179'127, 1'000'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<63, 10> * mag_power<10, -14> * si::kilogram / si::mole
codata2014::alpha_particle_proton_mass_ratio	alpha_particle_proton_mass_ratio	—	mag_ratio<397'259'968'907, 100'000'000'000> * one	mag_ratio<36, 10> * mag_power<10, -10> * one
codata2014::angstrom_star	angstrom_star	—	mag_ratio<100'001'495, 100'000'000> * mag_power<10, -10> * si::metre	mag_ratio<90, 10> * mag_power<10, -17> * si::metre
codata2014::atomic_mass_constant	m_u	—	mag_ratio<1'660'539'040, 1'000'000'000> * mag_power<10, -27> * si::kilogram	mag_ratio<20, 10> * mag_power<10, -35> * si::kilogram
codata2014::atomic_unit_of_1st_hyperpolarizability	atomic_unit_of_1st_hyperpolarizability	—	mag_ratio<3'206'361'329, 1'000'000'000> * mag_power<10, -53> * cubic(si::coulomb) * cubic(si::metre) / square(si::joule)	mag_ratio<20, 10> * mag_power<10, -61> * cubic(si::coulomb) * cubic(si::metre) / square(si::joule)
codata2014::atomic_unit_of_2nd_hyperpolarizability	atomic_unit_of_2nd_hyperpolarizability	—	mag_ratio<6'235'380'085, 1'000'000'000> * mag_power<10, -65> * pow<4>(si::coulomb) * pow<4>(si::metre) / cubic(si::joule)	mag_ratio<77, 10> * mag_power<10, -73> * pow<4>(si::coulomb) * pow<4>(si::metre) / cubic(si::joule)
codata2014::atomic_unit_of_action	ℏ (hbar)	—	alias to codata::codata2022::reduced_planck_constant	—
codata2014::atomic_unit_of_charge	e	—	alias to elementary_charge	—
codata2014::atomic_unit_of_charge_density	atomic_unit_of_charge_density	—	mag_ratio<10'812'023'770, 10'000'000'000> * mag_power<10, 12> * si::coulomb / cubic(si::metre)	mag_ratio<67, 10> * mag_power<10, 3> * si::coulomb / cubic(si::metre)
codata2014::atomic_unit_of_current	atomic_unit_of_current	—	mag_ratio<6'623'618'183, 1'000'000'000> * mag_power<10, -3> * si::ampere	mag_ratio<41, 10> * mag_power<10, -11> * si::ampere
codata2014::atomic_unit_of_electric_dipole_moment	atomic_unit_of_electric_dipole_moment	—	mag_ratio<8'478'353'552, 1'000'000'000> * mag_power<10, -30> * si::coulomb * si::metre	mag_ratio<52, 10> * mag_power<10, -38> * si::coulomb * si::metre
codata2014::atomic_unit_of_electric_field	atomic_unit_of_electric_field	—	mag_ratio<5'142'206'707, 1'000'000'000> * mag_power<10, 11> * si::volt / si::metre	mag_ratio<32, 10> * mag_power<10, 3> * si::volt / si::metre
codata2014::atomic_unit_of_electric_field_gradient	atomic_unit_of_electric_field_gradient	—	mag_ratio<9'717'362'356, 1'000'000'000> * mag_power<10, 21> * si::volt / square(si::metre)	mag_ratio<60, 10> * mag_power<10, 13> * si::volt / square(si::metre)
codata2014::atomic_unit_of_electric_polarizability	atomic_unit_of_electric_polarizability	—	mag_ratio<16'487'772'731, 10'000'000'000> * mag_power<10, -41> * square(si::coulomb) * square(si::metre) / si::joule	mag_ratio<11, 10> * mag_power<10, -50> * square(si::coulomb) * square(si::metre) / si::joule
codata2014::atomic_unit_of_electric_potential	atomic_unit_of_electric_potential	—	mag_ratio<2'721'138'602, 100'000'000> * si::volt	mag_ratio<17, 10> * mag_power<10, -7> * si::volt
codata2014::atomic_unit_of_electric_quadrupole_moment	atomic_unit_of_electric_quadrupole_moment	—	mag_ratio<4'486'551'484, 1'000'000'000> * mag_power<10, -40> * si::coulomb * square(si::metre)	mag_ratio<28, 10> * mag_power<10, -48> * si::coulomb * square(si::metre)
codata2014::atomic_unit_of_energy	E_h	—	alias to codata::codata2022::hartree_energy	mag_ratio<48, 10> * mag_power<10, -30> * si::joule
codata2014::atomic_unit_of_force	atomic_unit_of_force	—	mag_ratio<823'872'336, 100'000'000> * mag_power<10, -8> * si::newton	mag_ratio<10, 10> * mag_power<10, -15> * si::newton
codata2014::atomic_unit_of_length	a_0	—	alias to codata::codata2022::bohr_radius	mag_ratio<82, 10> * mag_power<10, -21> * si::metre
codata2014::atomic_unit_of_magnetic_dipole_moment	atomic_unit_of_magnetic_dipole_moment	—	mag_ratio<1'854'801'999, 1'000'000'000> * mag_power<10, -23> * si::joule / si::tesla	mag_ratio<11, 10> * mag_power<10, -31> * si::joule / si::tesla
codata2014::atomic_unit_of_magnetic_flux_density	atomic_unit_of_magnetic_flux_density	—	mag_ratio<2'350'517'550, 1'000'000'000> * mag_power<10, 5> * si::tesla	mag_ratio<14, 10> * mag_power<10, -3> * si::tesla
codata2014::atomic_unit_of_magnetizability	atomic_unit_of_magnetizability	—	mag_ratio<78'910'365'886, 10'000'000'000> * mag_power<10, -29> * si::joule / square(si::tesla)	mag_ratio<90, 10> * mag_power<10, -38> * si::joule / square(si::tesla)
codata2014::atomic_unit_of_mass	m_e	—	alias to codata::codata2022::electron_mass	mag_ratio<28, 10> * mag_power<10, -40> * si::kilogram
codata2014::atomic_unit_of_momentum	atomic_unit_of_momentum	—	mag_ratio<1'992'851'882, 1'000'000'000> * mag_power<10, -24> * si::kilogram * si::metre / si::second	mag_ratio<24, 10> * mag_power<10, -32> * si::kilogram * si::metre / si::second
codata2014::atomic_unit_of_permittivity	atomic_unit_of_permittivity	—	mag<4> * π / magnetic_constant / square(speed_of_light_in_vacuum)	—
codata2014::atomic_unit_of_time	atomic_unit_of_time	—	mag_ratio<2'418'884'326'509, 1'000'000'000'000> * mag_power<10, -17> * si::second	mag_ratio<14, 10> * mag_power<10, -28> * si::second
codata2014::atomic_unit_of_velocity	atomic_unit_of_velocity	—	mag_ratio<218'769'126'277, 100'000'000'000> * mag_power<10, 6> * si::metre / si::second	mag_ratio<50, 10> * mag_power<10, -4> * si::metre / si::second
codata2014::avogadro_constant	N_A	—	mag_ratio<6'022'140'857, 1'000'000'000> * mag_power<10, 23> * one / si::mole	mag_ratio<74, 10> * mag_power<10, 15> * one / si::mole
codata2014::bohr_magneton	μ_B (mu_B)	—	mag_ratio<9'274'009'994, 10'000'000> * mag_power<10, -26> * si::joule / si::tesla	mag_ratio<57, 10> * mag_power<10, -32> * si::joule / si::tesla
codata2014::bohr_radius	a_0	—	mag_ratio<52'917'721'067, 100'000'000'000> * mag_power<10, -10> * si::metre	mag_ratio<12, 10> * mag_power<10, -20> * si::metre
codata2014::boltzmann_constant	k	—	mag_ratio<138'064'852, 100'000'000> * mag_power<10, -23> * si::joule / si::kelvin	mag_ratio<79, 10> * mag_power<10, -30> * si::joule / si::kelvin
codata2014::characteristic_impedance_of_vacuum	Z_0	—	magnetic_constant * speed_of_light_in_vacuum	—
codata2014::classical_electron_radius	r_e	—	mag_ratio<28'179'403'227, 10'000'000'000> * mag_power<10, -15> * si::metre	mag_ratio<19, 10> * mag_power<10, -24> * si::metre
codata2014::conductance_quantum	G_0	—	mag_ratio<77'480'917'310, 10'000'000'000> * mag_power<10, -5> * si::siemens	mag_ratio<18, 10> * mag_power<10, -14> * si::siemens
codata2014::copper_x_unit	copper_x_unit	—	mag_ratio<100'207'697, 100'000'000> * mag_power<10, -13> * si::metre	mag_ratio<28, 10> * mag_power<10, -20> * si::metre
codata2014::deuteron_electron_magnetic_moment_ratio	deuteron_electron_magnetic_moment_ratio	—	-mag_ratio<4'664'345'535, 1'000'000'000> * mag_power<10, -4> * one	mag_ratio<26, 10> * mag_power<10, -12> * one
codata2014::deuteron_electron_mass_ratio	deuteron_electron_mass_ratio	—	mag_ratio<367'048'296'785, 100'000'000> * one	mag_ratio<13, 10> * mag_power<10, -7> * one
codata2014::deuteron_g_factor	g_d	—	mag_ratio<8'574'382'311, 10'000'000'000> * one	mag_ratio<48, 10> * mag_power<10, -9> * one
codata2014::deuteron_magnetic_moment	μ_d (mu_d)	—	mag_ratio<4'330'735'040, 10'000'000'000> * mag_power<10, -26> * si::joule / si::tesla	mag_ratio<36, 10> * mag_power<10, -35> * si::joule / si::tesla
codata2014::deuteron_magnetic_moment_to_bohr_magneton_ratio	deuteron_magnetic_moment_to_bohr_magneton_ratio	—	mag_ratio<4'669'754'554, 10'000'000'000> * mag_power<10, -3> * one	mag_ratio<26, 10> * mag_power<10, -12> * one
codata2014::deuteron_magnetic_moment_to_nuclear_magneton_ratio	deuteron_magnetic_moment_to_nuclear_magneton_ratio	—	mag_ratio<8'574'382'311, 10'000'000'000> * one	mag_ratio<48, 10> * mag_power<10, -9> * one
codata2014::deuteron_mass	m_d	—	mag_ratio<3'343'583'719, 1'000'000'000> * mag_power<10, -27> * si::kilogram	mag_ratio<41, 10> * mag_power<10, -35> * si::kilogram
codata2014::deuteron_molar_mass	deuteron_molar_mass	—	mag_ratio<2'013'553'212'745, 1'000'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<40, 10> * mag_power<10, -14> * si::kilogram / si::mole
codata2014::deuteron_neutron_magnetic_moment_ratio	deuteron_neutron_magnetic_moment_ratio	—	-mag_ratio<44'820'652, 100'000'000> * one	mag_ratio<11, 10> * mag_power<10, -7> * one
codata2014::deuteron_proton_magnetic_moment_ratio	deuteron_proton_magnetic_moment_ratio	—	mag_ratio<3'070'122'077, 10'000'000'000> * one	mag_ratio<15, 10> * mag_power<10, -9> * one
codata2014::deuteron_proton_mass_ratio	deuteron_proton_mass_ratio	—	mag_ratio<199'900'750'087, 100'000'000'000> * one	mag_ratio<19, 10> * mag_power<10, -10> * one
codata2014::deuteron_rms_charge_radius	r_d	—	mag_ratio<21'413, 10'000> * mag_power<10, -15> * si::metre	mag_ratio<25, 10> * mag_power<10, -18> * si::metre
codata2014::electron_charge_to_mass_quotient	electron_charge_to_mass_quotient	—	-mag_ratio<1'758'820'024, 1'000'000'000> * mag_power<10, 11> * si::coulomb / si::kilogram	mag_ratio<11, 10> * mag_power<10, 3> * si::coulomb / si::kilogram
codata2014::electron_compton_wavelength	λ_C (lambda_C)	—	mag_ratio<24'263'102'367, 10'000'000'000> * mag_power<10, -12> * si::metre	mag_ratio<11, 10> * mag_power<10, -21> * si::metre
codata2014::electron_deuteron_magnetic_moment_ratio	electron_deuteron_magnetic_moment_ratio	—	-mag_ratio<2'143'923'499, 1'000'000> * one	mag_ratio<12, 10> * mag_power<10, -5> * one
codata2014::electron_deuteron_mass_ratio	electron_deuteron_mass_ratio	—	mag_ratio<2'724'437'107'484, 1'000'000'000'000> * mag_power<10, -4> * one	mag_ratio<96, 10> * mag_power<10, -15> * one
codata2014::electron_g_factor	g_e	—	-mag_ratio<200'231'930'436'182, 100'000'000'000'000> * one	mag_ratio<52, 10> * mag_power<10, -13> * one
codata2014::electron_gyromagnetic_ratio	γ_e (gamma_e)	—	mag_ratio<1'760'859'644, 1'000'000'000> * mag_power<10, 11> * one / si::second / si::tesla	mag_ratio<11, 10> * mag_power<10, 3> * one / si::second / si::tesla
codata2014::electron_helion_mass_ratio	electron_helion_mass_ratio	—	mag_ratio<1'819'543'074'854, 1'000'000'000'000> * mag_power<10, -4> * one	mag_ratio<88, 10> * mag_power<10, -15> * one
codata2014::electron_magnetic_moment	μ_e (mu_e)	—	-mag_ratio<9'284'764'620, 10'000'000> * mag_power<10, -26> * si::joule / si::tesla	mag_ratio<57, 10> * mag_power<10, -32> * si::joule / si::tesla
codata2014::electron_magnetic_moment_anomaly	electron_magnetic_moment_anomaly	—	mag_ratio<115'965'218'091, 100'000'000'000> * mag_power<10, -3> * one	mag_ratio<26, 10> * mag_power<10, -13> * one
codata2014::electron_magnetic_moment_to_bohr_magneton_ratio	electron_magnetic_moment_to_bohr_magneton_ratio	—	-mag_ratio<100'115'965'218'091, 100'000'000'000'000> * one	mag_ratio<26, 10> * mag_power<10, -13> * one
codata2014::electron_magnetic_moment_to_nuclear_magneton_ratio	electron_magnetic_moment_to_nuclear_magneton_ratio	—	-mag_ratio<183'828'197'234, 100'000'000> * one	mag_ratio<17, 10> * mag_power<10, -7> * one
codata2014::electron_mass	m_e	—	mag_ratio<910'938'356, 100'000'000> * mag_power<10, -31> * si::kilogram	mag_ratio<11, 10> * mag_power<10, -38> * si::kilogram
codata2014::electron_molar_mass	electron_molar_mass	—	mag_ratio<548'579'909'070, 100'000'000'000> * mag_power<10, -7> * si::kilogram / si::mole	mag_ratio<16, 10> * mag_power<10, -17> * si::kilogram / si::mole
codata2014::electron_muon_magnetic_moment_ratio	electron_muon_magnetic_moment_ratio	—	mag_ratio<2'067'669'880, 10'000'000> * one	mag_ratio<46, 10> * mag_power<10, -6> * one
codata2014::electron_muon_mass_ratio	electron_muon_mass_ratio	—	mag_ratio<483'633'170, 100'000'000> * mag_power<10, -3> * one	mag_ratio<11, 10> * mag_power<10, -10> * one
codata2014::electron_neutron_magnetic_moment_ratio	electron_neutron_magnetic_moment_ratio	—	mag_ratio<96'092'050, 100'000> * one	mag_ratio<23, 10> * mag_power<10, -4> * one
codata2014::electron_neutron_mass_ratio	electron_neutron_mass_ratio	—	mag_ratio<54'386'734'428, 10'000'000'000> * mag_power<10, -4> * one	mag_ratio<27, 10> * mag_power<10, -13> * one
codata2014::electron_proton_magnetic_moment_ratio	electron_proton_magnetic_moment_ratio	—	-mag_ratio<6'582'106'866, 10'000'000> * one	mag_ratio<20, 10> * mag_power<10, -6> * one
codata2014::electron_proton_mass_ratio	electron_proton_mass_ratio	—	mag_ratio<544'617'021'352, 100'000'000'000> * mag_power<10, -4> * one	mag_ratio<52, 10> * mag_power<10, -14> * one
codata2014::electron_tau_mass_ratio	electron_tau_mass_ratio	—	mag_ratio<287'592, 100'000> * mag_power<10, -4> * one	mag_ratio<26, 10> * mag_power<10, -8> * one
codata2014::electron_to_alpha_particle_mass_ratio	electron_to_alpha_particle_mass_ratio	—	mag_ratio<1'370'933'554'798, 1'000'000'000'000> * mag_power<10, -4> * one	mag_ratio<45, 10> * mag_power<10, -15> * one
codata2014::electron_to_shielded_helion_magnetic_moment_ratio	electron_to_shielded_helion_magnetic_moment_ratio	—	mag_ratio<864'058'257, 1'000'000> * one	mag_ratio<10, 10> * mag_power<10, -5> * one
codata2014::electron_to_shielded_proton_magnetic_moment_ratio	electron_to_shielded_proton_magnetic_moment_ratio	—	-mag_ratio<6'582'275'971, 10'000'000> * one	mag_ratio<72, 10> * mag_power<10, -6> * one
codata2014::electron_triton_mass_ratio	electron_triton_mass_ratio	—	mag_ratio<1'819'200'062'203, 1'000'000'000'000> * mag_power<10, -4> * one	mag_ratio<84, 10> * mag_power<10, -15> * one
codata2014::elementary_charge	e	—	mag_ratio<16'021'766'208, 10'000'000'000> * mag_power<10, -19> * si::coulomb	mag_ratio<98, 10> * mag_power<10, -28> * si::coulomb
codata2014::elementary_charge_over_h	elementary_charge_over_h	—	mag_ratio<2'417'989'262, 1'000'000'000> * mag_power<10, 14> * si::ampere / si::joule	mag_ratio<15, 10> * mag_power<10, 6> * si::ampere / si::joule
codata2014::faraday_constant	F	—	mag_ratio<9'648'533'289, 100'000> * si::coulomb / si::mole	mag_ratio<59, 10> * mag_power<10, -4> * si::coulomb / si::mole
codata2014::fermi_coupling_constant	fermi_coupling_constant	—	mag_ratio<11'663'787, 10'000'000> * mag_power<10, -5> * one / square(si::giga<si::electronvolt>)	mag<6> * mag_power<10, -12> * one / square(si::giga<si::electronvolt>)
codata2014::fine_structure_constant	α (alpha)	—	mag_ratio<72'973'525'664, 10'000'000'000> * mag_power<10, -3> * one	mag_ratio<17, 10> * mag_power<10, -12> * one
codata2014::first_radiation_constant	c_1	—	mag_ratio<3'741'771'790, 1'000'000'000> * mag_power<10, -16> * si::watt * square(si::metre)	mag_ratio<46, 10> * mag_power<10, -24> * si::watt * square(si::metre)
codata2014::first_radiation_constant_for_spectral_radiance	c_1L	—	mag_ratio<1'191'042'953, 1'000'000'000> * mag_power<10, -16> * si::watt * square(si::metre) / si::steradian	mag_ratio<15, 10> * mag_power<10, -24> * si::watt * square(si::metre) / si::steradian
codata2014::hartree_energy	E_h	—	mag_ratio<4'359'744'650, 1'000'000'000> * mag_power<10, -18> * si::joule	mag_ratio<54, 10> * mag_power<10, -26> * si::joule
codata2014::helion_electron_mass_ratio	helion_electron_mass_ratio	—	mag_ratio<549'588'527'922, 100'000'000> * one	mag_ratio<27, 10> * mag_power<10, -7> * one
codata2014::helion_g_factor	g_h	—	-mag_ratio<4'255'250'616, 1'000'000'000> * one	mag_ratio<50, 10> * mag_power<10, -8> * one
codata2014::helion_magnetic_moment	helion_magnetic_moment	—	-mag_ratio<1'074'617'522, 1'000'000'000> * mag_power<10, -26> * si::joule / si::tesla	mag_ratio<14, 10> * mag_power<10, -34> * si::joule / si::tesla
codata2014::helion_magnetic_moment_to_bohr_magneton_ratio	helion_magnetic_moment_to_bohr_magneton_ratio	—	-mag_ratio<1'158'740'958, 1'000'000'000> * mag_power<10, -3> * one	mag_ratio<14, 10> * mag_power<10, -11> * one
codata2014::helion_magnetic_moment_to_nuclear_magneton_ratio	helion_magnetic_moment_to_nuclear_magneton_ratio	—	-mag_ratio<2'127'625'308, 1'000'000'000> * one	mag_ratio<25, 10> * mag_power<10, -8> * one
codata2014::helion_mass	m_h	—	mag_ratio<5'006'412'700, 1'000'000'000> * mag_power<10, -27> * si::kilogram	mag_ratio<62, 10> * mag_power<10, -35> * si::kilogram
codata2014::helion_molar_mass	helion_molar_mass	—	mag_ratio<301'493'224'673, 100'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<12, 10> * mag_power<10, -13> * si::kilogram / si::mole
codata2014::helion_proton_mass_ratio	helion_proton_mass_ratio	—	mag_ratio<299'315'267'046, 100'000'000'000> * one	mag_ratio<29, 10> * mag_power<10, -10> * one
codata2014::inverse_fine_structure_constant	inverse_fine_structure_constant	—	mag_ratio<137'035'999'139, 1'000'000'000> * one	mag_ratio<31, 10> * mag_power<10, -8> * one
codata2014::inverse_of_conductance_quantum	inverse_of_conductance_quantum	—	mag_ratio<129'064'037'278, 10'000'000> * si::ohm	mag_ratio<29, 10> * mag_power<10, -6> * si::ohm
codata2014::josephson_constant	K_J	—	mag_ratio<4'835'978'525, 10'000> * mag_power<10, 9> * si::hertz / si::volt	mag_ratio<30, 10> * mag_power<10, 6> * si::hertz / si::volt
codata2014::lattice_parameter_of_silicon	lattice_parameter_of_silicon	—	mag_ratio<5'431'020'504, 10'000'000> * mag_power<10, -12> * si::metre	mag_ratio<89, 10> * mag_power<10, -18> * si::metre
codata2014::lattice_spacing_of_silicon_220	lattice_spacing_of_silicon_220	—	mag_ratio<1'920'155'714, 10'000'000> * mag_power<10, -12> * si::metre	mag_ratio<32, 10> * mag_power<10, -18> * si::metre
codata2014::loschmidt_constant_atm	loschmidt_constant_atm	—	mag_ratio<26'867'811, 10'000'000> * mag_power<10, 25> * one / cubic(si::metre)	mag_ratio<15, 10> * mag_power<10, 19> * one / cubic(si::metre)
codata2014::loschmidt_constant_stp	n_0	—	mag_ratio<26'516'467, 10'000'000> * mag_power<10, 25> * one / cubic(si::metre)	mag_ratio<15, 10> * mag_power<10, 19> * one / cubic(si::metre)
codata2014::magnetic_constant	μ₀ (u_0)	—	mag<4> * mag_power<10, -7> * π * si::henry / si::metre	—
codata2014::magnetic_flux_quantum	Φ₀ (Phi_0)	—	mag_ratio<2'067'833'831, 1'000'000'000> * mag_power<10, -15> * si::weber	mag_ratio<13, 10> * mag_power<10, -23> * si::weber
codata2014::molar_gas_constant	R	—	mag_ratio<83'144'598, 10'000'000> * si::joule / si::mole / si::kelvin	mag_ratio<48, 10> * mag_power<10, -6> * si::joule / si::mole / si::kelvin
codata2014::molar_mass_constant	M_u	—	mag<1> * mag_power<10, -3> * si::kilogram / si::mole	—
codata2014::molar_mass_of_carbon_12	molar_mass_of_carbon_12	—	mag<12> * mag_power<10, -3> * si::kilogram / si::mole	—
codata2014::molar_planck_constant	N_Ah	—	mag_ratio<39'903'127'110, 10'000'000'000> * mag_power<10, -10> * si::joule * si::second / si::mole	mag_ratio<18, 10> * mag_power<10, -19> * si::joule * si::second / si::mole
codata2014::molar_planck_constant_times_c	molar_planck_constant_times_c	—	mag_ratio<119'626'565'582, 1'000'000'000'000> * si::joule * si::metre / si::mole	mag_ratio<54, 10> * mag_power<10, -11> * si::joule * si::metre / si::mole
codata2014::molar_volume_of_ideal_gas_atm	molar_volume_of_ideal_gas_atm	—	mag_ratio<22'413'962, 1'000'000> * mag_power<10, -3> * cubic(si::metre) / si::mole	mag_ratio<13, 10> * mag_power<10, -8> * cubic(si::metre) / si::mole
codata2014::molar_volume_of_ideal_gas_stp	molar_volume_of_ideal_gas_stp	—	mag_ratio<22'710'947, 1'000'000> * mag_power<10, -3> * cubic(si::metre) / si::mole	mag_ratio<13, 10> * mag_power<10, -8> * cubic(si::metre) / si::mole
codata2014::molar_volume_of_silicon	molar_volume_of_silicon	—	mag_ratio<1'205'883'214, 100'000'000> * mag_power<10, -6> * cubic(si::metre) / si::mole	mag_ratio<61, 10> * mag_power<10, -13> * cubic(si::metre) / si::mole
codata2014::molybdenum_x_unit	molybdenum_x_unit	—	mag_ratio<100'209'952, 100'000'000> * mag_power<10, -13> * si::metre	mag_ratio<53, 10> * mag_power<10, -20> * si::metre
codata2014::muon_compton_wavelength	muon_compton_wavelength	—	mag_ratio<1'173'444'111, 100'000'000> * mag_power<10, -15> * si::metre	mag_ratio<26, 10> * mag_power<10, -22> * si::metre
codata2014::muon_electron_mass_ratio	muon_electron_mass_ratio	—	mag_ratio<2'067'682'826, 10'000'000> * one	mag_ratio<46, 10> * mag_power<10, -6> * one
codata2014::muon_g_factor	g_μ (g_mu)	—	-mag_ratio<20'023'318'418, 10'000'000'000> * one	mag_ratio<13, 10> * mag_power<10, -9> * one
codata2014::muon_magnetic_moment	μ_μ (mu_mu)	—	-mag_ratio<449'044'826, 100'000'000> * mag_power<10, -26> * si::joule / si::tesla	mag_ratio<10, 10> * mag_power<10, -33> * si::joule / si::tesla
codata2014::muon_magnetic_moment_anomaly	muon_magnetic_moment_anomaly	—	mag_ratio<116'592'089, 100'000'000> * mag_power<10, -3> * one	mag_ratio<63, 10> * mag_power<10, -10> * one
codata2014::muon_magnetic_moment_to_bohr_magneton_ratio	muon_magnetic_moment_to_bohr_magneton_ratio	—	-mag_ratio<484'197'048, 100'000'000> * mag_power<10, -3> * one	mag_ratio<11, 10> * mag_power<10, -10> * one
codata2014::muon_magnetic_moment_to_nuclear_magneton_ratio	muon_magnetic_moment_to_nuclear_magneton_ratio	—	-mag_ratio<889'059'705, 100'000'000> * one	mag_ratio<20, 10> * mag_power<10, -7> * one
codata2014::muon_mass	m_μ (m_mu)	—	mag_ratio<1'883'531'594, 1'000'000'000> * mag_power<10, -28> * si::kilogram	mag_ratio<48, 10> * mag_power<10, -36> * si::kilogram
codata2014::muon_molar_mass	muon_molar_mass	—	mag_ratio<1'134'289'257, 10'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<25, 10> * mag_power<10, -12> * si::kilogram / si::mole
codata2014::muon_neutron_mass_ratio	muon_neutron_mass_ratio	—	mag_ratio<1'124'545'167, 10'000'000'000> * one	mag_ratio<25, 10> * mag_power<10, -9> * one
codata2014::muon_proton_magnetic_moment_ratio	muon_proton_magnetic_moment_ratio	—	-mag_ratio<3'183'345'142, 1'000'000'000> * one	mag_ratio<71, 10> * mag_power<10, -8> * one
codata2014::muon_proton_mass_ratio	muon_proton_mass_ratio	—	mag_ratio<1'126'095'262, 10'000'000'000> * one	mag_ratio<25, 10> * mag_power<10, -9> * one
codata2014::muon_tau_mass_ratio	muon_tau_mass_ratio	—	mag_ratio<594'649, 100'000> * mag_power<10, -2> * one	mag_ratio<54, 10> * mag_power<10, -6> * one
codata2014::natural_unit_of_action	ℏ (hbar)	—	alias to codata::codata2022::reduced_planck_constant	—
codata2014::natural_unit_of_energy	natural_unit_of_energy	—	mag_ratio<818'710'565, 100'000'000> * mag_power<10, -14> * si::joule	mag_ratio<10, 10> * mag_power<10, -21> * si::joule
codata2014::natural_unit_of_length	natural_unit_of_length	—	mag_ratio<38'615'926'764, 100'000'000> * mag_power<10, -15> * si::metre	mag_ratio<18, 10> * mag_power<10, -22> * si::metre
codata2014::natural_unit_of_mass	m_e	—	alias to codata::codata2022::electron_mass	mag_ratio<28, 10> * mag_power<10, -40> * si::kilogram
codata2014::natural_unit_of_momentum	natural_unit_of_momentum	—	mag_ratio<2'730'924'488, 1'000'000'000> * mag_power<10, -22> * si::kilogram * si::metre / si::second	mag_ratio<34, 10> * mag_power<10, -30> * si::kilogram * si::metre / si::second
codata2014::natural_unit_of_time	natural_unit_of_time	—	mag_ratio<128'808'866'712, 100'000'000'000> * mag_power<10, -21> * si::second	mag_ratio<58, 10> * mag_power<10, -31> * si::second
codata2014::natural_unit_of_velocity	c	—	alias to speed_of_light_in_vacuum	—
codata2014::neutron_compton_wavelength	neutron_compton_wavelength	—	mag_ratio<131'959'090'481, 100'000'000'000> * mag_power<10, -15> * si::metre	mag_ratio<88, 10> * mag_power<10, -25> * si::metre
codata2014::neutron_electron_magnetic_moment_ratio	neutron_electron_magnetic_moment_ratio	—	mag_ratio<104'066'882, 100'000'000> * mag_power<10, -3> * one	mag_ratio<25, 10> * mag_power<10, -10> * one
codata2014::neutron_electron_mass_ratio	neutron_electron_mass_ratio	—	mag_ratio<183'868'366'158, 100'000'000> * one	mag_ratio<90, 10> * mag_power<10, -7> * one
codata2014::neutron_g_factor	g_n	—	-mag_ratio<382'608'545, 100'000'000> * one	mag_ratio<90, 10> * mag_power<10, -7> * one
codata2014::neutron_gyromagnetic_ratio	γ_n (gamma_n)	—	mag_ratio<183'247'172, 100'000'000> * mag_power<10, 8> * one / si::second / si::tesla	mag_ratio<43, 10> * mag_power<10, 1> * one / si::second / si::tesla
codata2014::neutron_magnetic_moment	μ_n (mu_n)	—	-mag_ratio<96'623'650, 100'000'000> * mag_power<10, -26> * si::joule / si::tesla	mag_ratio<23, 10> * mag_power<10, -33> * si::joule / si::tesla
codata2014::neutron_magnetic_moment_to_bohr_magneton_ratio	neutron_magnetic_moment_to_bohr_magneton_ratio	—	-mag_ratio<104'187'563, 100'000'000> * mag_power<10, -3> * one	mag_ratio<25, 10> * mag_power<10, -10> * one
codata2014::neutron_magnetic_moment_to_nuclear_magneton_ratio	neutron_magnetic_moment_to_nuclear_magneton_ratio	—	-mag_ratio<191'304'273, 100'000'000> * one	mag_ratio<45, 10> * mag_power<10, -7> * one
codata2014::neutron_mass	m_n	—	mag_ratio<1'674'927'471, 1'000'000'000> * mag_power<10, -27> * si::kilogram	mag_ratio<21, 10> * mag_power<10, -35> * si::kilogram
codata2014::neutron_molar_mass	neutron_molar_mass	—	mag_ratio<100'866'491'588, 100'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<49, 10> * mag_power<10, -13> * si::kilogram / si::mole
codata2014::neutron_muon_mass_ratio	neutron_muon_mass_ratio	—	mag_ratio<889'248'408, 100'000'000> * one	mag_ratio<20, 10> * mag_power<10, -7> * one
codata2014::neutron_proton_magnetic_moment_ratio	neutron_proton_magnetic_moment_ratio	—	-mag_ratio<68'497'934, 100'000'000> * one	mag_ratio<16, 10> * mag_power<10, -7> * one
codata2014::neutron_proton_mass_difference	neutron_proton_mass_difference	—	mag_ratio<230'557'377, 100'000'000> * mag_power<10, -30> * one	mag_ratio<85, 10> * mag_power<10, -37> * one
codata2014::neutron_proton_mass_ratio	neutron_proton_mass_ratio	—	mag_ratio<100'137'841'898, 100'000'000'000> * one	mag_ratio<51, 10> * mag_power<10, -10> * one
codata2014::neutron_tau_mass_ratio	neutron_tau_mass_ratio	—	mag_ratio<528'790, 1'000'000> * one	mag_ratio<48, 10> * mag_power<10, -5> * one
codata2014::neutron_to_shielded_proton_magnetic_moment_ratio	neutron_to_shielded_proton_magnetic_moment_ratio	—	-mag_ratio<68'499'694, 100'000'000> * one	mag_ratio<16, 10> * mag_power<10, -7> * one
codata2014::newtonian_constant_of_gravitation	G	—	mag_ratio<667'408, 100'000> * mag_power<10, -11> * cubic(si::metre) / si::kilogram / square(si::second)	mag_ratio<31, 10> * mag_power<10, -15> * cubic(si::metre) / si::kilogram / square(si::second)
codata2014::nuclear_magneton	μ_N (mu_N)	—	mag_ratio<5'050'783'699, 1'000'000'000> * mag_power<10, -27> * si::joule / si::tesla	mag_ratio<31, 10> * mag_power<10, -35> * si::joule / si::tesla
codata2014::planck_constant	h	—	mag_ratio<6'626'070'040, 1'000'000'000> * mag_power<10, -34> * si::joule * si::second	mag_ratio<81, 10> * mag_power<10, -42> * si::joule * si::second
codata2014::planck_length	l_P	—	mag_ratio<1'616'229, 1'000'000> * mag_power<10, -35> * si::metre	mag_ratio<38, 10> * mag_power<10, -40> * si::metre
codata2014::planck_mass	m_P	—	mag_ratio<2'176'470, 1'000'000> * mag_power<10, -8> * si::kilogram	mag_ratio<51, 10> * mag_power<10, -13> * si::kilogram
codata2014::planck_temperature	T_P	—	mag_ratio<1'416'808, 1'000'000> * mag_power<10, 32> * si::kelvin	mag_ratio<33, 10> * mag_power<10, 27> * si::kelvin
codata2014::planck_time	t_P	—	mag_ratio<539'116, 100'000> * mag_power<10, -44> * si::second	mag_ratio<13, 10> * mag_power<10, -48> * si::second
codata2014::proton_charge_to_mass_quotient	proton_charge_to_mass_quotient	—	mag_ratio<9'578'833'226, 1'000'000'000> * mag_power<10, 7> * si::coulomb / si::kilogram	mag_ratio<59, 10> * mag_power<10, -1> * si::coulomb / si::kilogram
codata2014::proton_compton_wavelength	proton_compton_wavelength	—	mag_ratio<132'140'985'396, 100'000'000'000> * mag_power<10, -15> * si::metre	mag_ratio<61, 10> * mag_power<10, -25> * si::metre
codata2014::proton_electron_mass_ratio	proton_electron_mass_ratio	—	mag_ratio<183'615'267'389, 100'000'000> * one	mag_ratio<17, 10> * mag_power<10, -7> * one
codata2014::proton_g_factor	g_p	—	mag_ratio<5'585'694'702, 1'000'000'000> * one	mag_ratio<17, 10> * mag_power<10, -8> * one
codata2014::proton_gyromagnetic_ratio	γ_p (gamma_p)	—	mag_ratio<2'675'221'900, 1'000'000'000> * mag_power<10, 8> * one / si::second / si::tesla	mag_ratio<18, 10> * one / si::second / si::tesla
codata2014::proton_magnetic_moment	μ_p (mu_p)	—	mag_ratio<14'106'067'873, 10'000'000'000> * mag_power<10, -26> * si::joule / si::tesla	mag_ratio<97, 10> * mag_power<10, -35> * si::joule / si::tesla
codata2014::proton_magnetic_moment_to_bohr_magneton_ratio	proton_magnetic_moment_to_bohr_magneton_ratio	—	mag_ratio<15'210'322'053, 10'000'000'000> * mag_power<10, -3> * one	mag_ratio<46, 10> * mag_power<10, -12> * one
codata2014::proton_magnetic_moment_to_nuclear_magneton_ratio	proton_magnetic_moment_to_nuclear_magneton_ratio	—	mag_ratio<27'928'473'508, 10'000'000'000> * one	mag_ratio<85, 10> * mag_power<10, -9> * one
codata2014::proton_magnetic_shielding_correction	proton_magnetic_shielding_correction	—	mag_ratio<25'691, 1'000> * mag_power<10, -6> * one	mag_ratio<11, 10> * mag_power<10, -8> * one
codata2014::proton_mass	m_p	—	mag_ratio<1'672'621'898, 1'000'000'000> * mag_power<10, -27> * si::kilogram	mag_ratio<21, 10> * mag_power<10, -35> * si::kilogram
codata2014::proton_molar_mass	proton_molar_mass	—	mag_ratio<1'007'276'466'879, 1'000'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<91, 10> * mag_power<10, -14> * si::kilogram / si::mole
codata2014::proton_muon_mass_ratio	proton_muon_mass_ratio	—	mag_ratio<888'024'338, 100'000'000> * one	mag_ratio<20, 10> * mag_power<10, -7> * one
codata2014::proton_neutron_magnetic_moment_ratio	proton_neutron_magnetic_moment_ratio	—	-mag_ratio<145'989'805, 100'000'000> * one	mag_ratio<34, 10> * mag_power<10, -7> * one
codata2014::proton_neutron_mass_ratio	proton_neutron_mass_ratio	—	mag_ratio<99'862'347'844, 100'000'000'000> * one	mag_ratio<51, 10> * mag_power<10, -10> * one
codata2014::proton_rms_charge_radius	r_p	—	mag_ratio<8'751, 10'000> * mag_power<10, -15> * si::metre	mag_ratio<61, 10> * mag_power<10, -18> * si::metre
codata2014::proton_tau_mass_ratio	proton_tau_mass_ratio	—	mag_ratio<528'063, 1'000'000> * one	mag_ratio<48, 10> * mag_power<10, -5> * one
codata2014::quantum_of_circulation	quantum_of_circulation	—	mag_ratio<36'369'475'486, 10'000'000'000> * mag_power<10, -4> * square(si::metre) / si::second	mag_ratio<17, 10> * mag_power<10, -13> * square(si::metre) / si::second
codata2014::quantum_of_circulation_times_2	quantum_of_circulation_times_2	—	mag_ratio<72'738'950'972, 10'000'000'000> * mag_power<10, -4> * square(si::metre) / si::second	mag_ratio<33, 10> * mag_power<10, -13> * square(si::metre) / si::second
codata2014::reduced_planck_constant	ℏ (hbar)	—	mag_ratio<1'054'571'800, 1'000'000'000> * mag_power<10, -34> * si::joule * si::second	mag_ratio<13, 10> * mag_power<10, -42> * si::joule * si::second
codata2014::rydberg_constant	R_∞ (R_inf)	—	mag_ratio<10'973'731'568'508, 1'000'000> * one / si::metre	mag_ratio<65, 10> * mag_power<10, -5> * one / si::metre
codata2014::sackur_tetrode_constant_100_kpa	sackur_tetrode_constant_100_kpa	—	-mag_ratio<11'517'084, 10'000'000> * one	mag_ratio<14, 10> * mag_power<10, -6> * one
codata2014::sackur_tetrode_constant_101_325_kpa	sackur_tetrode_constant_101_325_kpa	—	-mag_ratio<11'648'714, 10'000'000> * one	mag_ratio<14, 10> * mag_power<10, -6> * one
codata2014::second_radiation_constant	c_2	—	mag_ratio<143'877'736, 100'000'000> * mag_power<10, -2> * si::metre * si::kelvin	mag_ratio<83, 10> * mag_power<10, -9> * si::metre * si::kelvin
codata2014::shielded_helion_gyromagnetic_ratio	shielded_helion_gyromagnetic_ratio	—	mag_ratio<2'037'894'585, 1'000'000'000> * mag_power<10, 8> * one / si::second / si::tesla	mag_ratio<27, 10> * one / si::second / si::tesla
codata2014::shielded_helion_magnetic_moment	shielded_helion_magnetic_moment	—	-mag_ratio<1'074'553'080, 1'000'000'000> * mag_power<10, -26> * si::joule / si::tesla	mag_ratio<14, 10> * mag_power<10, -34> * si::joule / si::tesla
codata2014::shielded_helion_magnetic_moment_to_bohr_magneton_ratio	shielded_helion_magnetic_moment_to_bohr_magneton_ratio	—	-mag_ratio<1'158'671'471, 1'000'000'000> * mag_power<10, -3> * one	mag_ratio<14, 10> * mag_power<10, -11> * one
codata2014::shielded_helion_magnetic_moment_to_nuclear_magneton_ratio	shielded_helion_magnetic_moment_to_nuclear_magneton_ratio	—	-mag_ratio<2'127'497'720, 1'000'000'000> * one	mag_ratio<25, 10> * mag_power<10, -8> * one
codata2014::shielded_helion_to_proton_magnetic_moment_ratio	shielded_helion_to_proton_magnetic_moment_ratio	—	-mag_ratio<7'617'665'603, 10'000'000'000> * one	mag_ratio<92, 10> * mag_power<10, -9> * one
codata2014::shielded_helion_to_shielded_proton_magnetic_moment_ratio	shielded_helion_to_shielded_proton_magnetic_moment_ratio	—	-mag_ratio<7'617'861'313, 10'000'000'000> * one	mag_ratio<33, 10> * mag_power<10, -9> * one
codata2014::shielded_proton_gyromagnetic_ratio	shielded_proton_gyromagnetic_ratio	—	mag_ratio<2'675'153'171, 1'000'000'000> * mag_power<10, 8> * one / si::second / si::tesla	mag_ratio<33, 10> * one / si::second / si::tesla
codata2014::shielded_proton_magnetic_moment	shielded_proton_magnetic_moment	—	mag_ratio<1'410'570'547, 1'000'000'000> * mag_power<10, -26> * si::joule / si::tesla	mag_ratio<18, 10> * mag_power<10, -34> * si::joule / si::tesla
codata2014::shielded_proton_magnetic_moment_to_bohr_magneton_ratio	shielded_proton_magnetic_moment_to_bohr_magneton_ratio	—	mag_ratio<1'520'993'128, 1'000'000'000> * mag_power<10, -3> * one	mag_ratio<17, 10> * mag_power<10, -11> * one
codata2014::shielded_proton_magnetic_moment_to_nuclear_magneton_ratio	shielded_proton_magnetic_moment_to_nuclear_magneton_ratio	—	mag_ratio<2'792'775'600, 1'000'000'000> * one	mag_ratio<30, 10> * mag_power<10, -8> * one
codata2014::stefan_boltzmann_constant	σ (sigma)	—	mag_ratio<5'670'367, 1'000'000> * mag_power<10, -8> * si::watt / square(si::metre) / pow<4>(si::kelvin)	mag_ratio<13, 10> * mag_power<10, -13> * si::watt / square(si::metre) / pow<4>(si::kelvin)
codata2014::tau_compton_wavelength	tau_compton_wavelength	—	mag_ratio<697'787, 1'000'000> * mag_power<10, -15> * si::metre	mag_ratio<63, 10> * mag_power<10, -20> * si::metre
codata2014::tau_electron_mass_ratio	tau_electron_mass_ratio	—	mag_ratio<347'715, 100> * one	mag_ratio<31, 10> * mag_power<10, -1> * one
codata2014::tau_mass	m_τ (m_tau)	—	mag_ratio<316'747, 100'000> * mag_power<10, -27> * si::kilogram	mag_ratio<29, 10> * mag_power<10, -31> * si::kilogram
codata2014::tau_molar_mass	tau_molar_mass	—	mag_ratio<190'749, 100'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<17, 10> * mag_power<10, -7> * si::kilogram / si::mole
codata2014::tau_muon_mass_ratio	tau_muon_mass_ratio	—	mag_ratio<168'167, 10'000> * one	mag_ratio<15, 10> * mag_power<10, -3> * one
codata2014::tau_neutron_mass_ratio	tau_neutron_mass_ratio	—	mag_ratio<189'111, 100'000> * one	mag_ratio<17, 10> * mag_power<10, -4> * one
codata2014::tau_proton_mass_ratio	tau_proton_mass_ratio	—	mag_ratio<189'372, 100'000> * one	mag_ratio<17, 10> * mag_power<10, -4> * one
codata2014::thomson_cross_section	σ_e (sigma_e)	—	mag_ratio<66'524'587'158, 100'000'000'000> * mag_power<10, -28> * square(si::metre)	mag_ratio<91, 10> * mag_power<10, -38> * square(si::metre)
codata2014::triton_electron_mass_ratio	triton_electron_mass_ratio	—	mag_ratio<549'692'153'588, 100'000'000> * one	mag_ratio<26, 10> * mag_power<10, -7> * one
codata2014::triton_g_factor	g_t	—	mag_ratio<5'957'924'920, 1'000'000'000> * one	mag_ratio<28, 10> * mag_power<10, -8> * one
codata2014::triton_magnetic_moment	μ_t (mu_t)	—	mag_ratio<1'504'609'503, 1'000'000'000> * mag_power<10, -26> * si::joule / si::tesla	mag_ratio<12, 10> * mag_power<10, -34> * si::joule / si::tesla
codata2014::triton_magnetic_moment_to_bohr_magneton_ratio	triton_magnetic_moment_to_bohr_magneton_ratio	—	mag_ratio<16'223'936'616, 10'000'000'000> * mag_power<10, -3> * one	mag_ratio<76, 10> * mag_power<10, -12> * one
codata2014::triton_magnetic_moment_to_nuclear_magneton_ratio	triton_magnetic_moment_to_nuclear_magneton_ratio	—	mag_ratio<2'978'962'460, 1'000'000'000> * one	mag_ratio<14, 10> * mag_power<10, -8> * one
codata2014::triton_mass	m_t	—	mag_ratio<5'007'356'665, 1'000'000'000> * mag_power<10, -27> * si::kilogram	mag_ratio<62, 10> * mag_power<10, -35> * si::kilogram
codata2014::triton_molar_mass	triton_molar_mass	—	mag_ratio<301'550'071'632, 100'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<11, 10> * mag_power<10, -13> * si::kilogram / si::mole
codata2014::triton_proton_mass_ratio	triton_proton_mass_ratio	—	mag_ratio<299'371'703'348, 100'000'000'000> * one	mag_ratio<22, 10> * mag_power<10, -10> * one
codata2014::unified_atomic_mass_unit	m_u	—	alias to codata::codata2022::atomic_mass_constant	mag_ratio<52, 10> * mag_power<10, -37> * si::kilogram
codata2014::vacuum_electric_permittivity	ε₀ (eps_0)	—	one / magnetic_constant / square(speed_of_light_in_vacuum)	—
codata2014::von_klitzing_constant	R_K	—	mag_ratio<258'128'074'555, 10'000'000> * si::ohm	mag_ratio<59, 10> * mag_power<10, -6> * si::ohm
codata2014::weak_mixing_angle	weak_mixing_angle	—	mag_ratio<2'223, 10'000> * one	mag_ratio<21, 10> * mag_power<10, -3> * one
codata2014::wien_frequency_displacement_law_constant	b′ (b_prime)	—	mag_ratio<58'789'238, 10'000'000> * mag_power<10, 10> * si::hertz / si::kelvin	mag_ratio<34, 10> * mag_power<10, 4> * si::hertz / si::kelvin
codata2014::wien_wavelength_displacement_law_constant	b	—	mag_ratio<28'977'729, 10'000'000> * mag_power<10, -3> * si::metre * si::kelvin	mag_ratio<17, 10> * mag_power<10, -9> * si::metre * si::kelvin
codata2018::alpha_particle_electron_mass_ratio	alpha_particle_electron_mass_ratio	—	mag_ratio<729'429'954'142, 100'000'000> * one	mag_ratio<24, 10> * mag_power<10, -7> * one
codata2018::alpha_particle_mass	m_α (m_alpha)	—	mag_ratio<66'446'573'357, 10'000'000'000> * mag_power<10, -27> * si::kilogram	mag_ratio<20, 10> * mag_power<10, -36> * si::kilogram
codata2018::alpha_particle_molar_mass	alpha_particle_molar_mass	—	mag_ratio<40'015'061'777, 10'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<12, 10> * mag_power<10, -12> * si::kilogram / si::mole
codata2018::alpha_particle_proton_mass_ratio	alpha_particle_proton_mass_ratio	—	mag_ratio<397'259'969'009, 100'000'000'000> * one	mag_ratio<22, 10> * mag_power<10, -10> * one
codata2018::alpha_particle_relative_atomic_mass	alpha_particle_relative_atomic_mass	—	mag_ratio<4'001'506'179'127, 1'000'000'000'000> * one	mag_ratio<63, 10> * mag_power<10, -11> * one
codata2018::angstrom_star	angstrom_star	—	mag_ratio<100'001'495, 100'000'000> * mag_power<10, -10> * si::metre	mag_ratio<90, 10> * mag_power<10, -17> * si::metre
codata2018::atomic_mass_constant	m_u	—	mag_ratio<166'053'906'660, 100'000'000'000> * mag_power<10, -27> * si::kilogram	mag_ratio<50, 10> * mag_power<10, -37> * si::kilogram
codata2018::atomic_unit_of_1st_hyperpolarizability	atomic_unit_of_1st_hyperpolarizability	—	mag_ratio<32'063'613'061, 10'000'000'000> * mag_power<10, -53> * cubic(si::coulomb) * cubic(si::metre) / square(si::joule)	mag_ratio<15, 10> * mag_power<10, -62> * cubic(si::coulomb) * cubic(si::metre) / square(si::joule)
codata2018::atomic_unit_of_2nd_hyperpolarizability	atomic_unit_of_2nd_hyperpolarizability	—	mag_ratio<62'353'799'905, 10'000'000'000> * mag_power<10, -65> * pow<4>(si::coulomb) * pow<4>(si::metre) / cubic(si::joule)	mag_ratio<38, 10> * mag_power<10, -74> * pow<4>(si::coulomb) * pow<4>(si::metre) / cubic(si::joule)
codata2018::atomic_unit_of_action	ℏ (hbar)	—	alias to codata::codata2022::reduced_planck_constant	—
codata2018::atomic_unit_of_charge	e	—	alias to elementary_charge	—
codata2018::atomic_unit_of_charge_density	atomic_unit_of_charge_density	—	mag_ratio<108'120'238'457, 100'000'000'000> * mag_power<10, 12> * si::coulomb / cubic(si::metre)	mag_ratio<49, 10> * mag_power<10, 2> * si::coulomb / cubic(si::metre)
codata2018::atomic_unit_of_current	atomic_unit_of_current	—	mag_ratio<6'623'618'237'510, 1'000'000'000'000> * mag_power<10, -3> * si::ampere	mag_ratio<13, 10> * mag_power<10, -14> * si::ampere
codata2018::atomic_unit_of_electric_dipole_moment	atomic_unit_of_electric_dipole_moment	—	mag_ratio<84'783'536'255, 10'000'000'000> * mag_power<10, -30> * si::coulomb * si::metre	mag_ratio<13, 10> * mag_power<10, -39> * si::coulomb * si::metre
codata2018::atomic_unit_of_electric_field	atomic_unit_of_electric_field	—	mag_ratio<514'220'674'763, 100'000'000'000> * mag_power<10, 11> * si::volt / si::metre	mag_ratio<78, 10> * mag_power<10, 1> * si::volt / si::metre
codata2018::atomic_unit_of_electric_field_gradient	atomic_unit_of_electric_field_gradient	—	mag_ratio<97'173'624'292, 10'000'000'000> * mag_power<10, 21> * si::volt / square(si::metre)	mag_ratio<29, 10> * mag_power<10, 12> * si::volt / square(si::metre)
codata2018::atomic_unit_of_electric_polarizability	atomic_unit_of_electric_polarizability	—	mag_ratio<164'877'727'436, 100'000'000'000> * mag_power<10, -41> * square(si::coulomb) * square(si::metre) / si::joule	mag_ratio<50, 10> * mag_power<10, -51> * square(si::coulomb) * square(si::metre) / si::joule
codata2018::atomic_unit_of_electric_potential	atomic_unit_of_electric_potential	—	mag_ratio<27'211'386'245'988, 1'000'000'000'000> * si::volt	mag_ratio<53, 10> * mag_power<10, -11> * si::volt
codata2018::atomic_unit_of_electric_quadrupole_moment	atomic_unit_of_electric_quadrupole_moment	—	mag_ratio<44'865'515'246, 10'000'000'000> * mag_power<10, -40> * si::coulomb * square(si::metre)	mag_ratio<14, 10> * mag_power<10, -49> * si::coulomb * square(si::metre)
codata2018::atomic_unit_of_energy	E_h	—	alias to codata::codata2022::hartree_energy	mag_ratio<48, 10> * mag_power<10, -30> * si::joule
codata2018::atomic_unit_of_force	atomic_unit_of_force	—	mag_ratio<82'387'234'983, 10'000'000'000> * mag_power<10, -8> * si::newton	mag_ratio<12, 10> * mag_power<10, -17> * si::newton
codata2018::atomic_unit_of_length	a_0	—	alias to codata::codata2022::bohr_radius	mag_ratio<82, 10> * mag_power<10, -21> * si::metre
codata2018::atomic_unit_of_magnetic_dipole_moment	atomic_unit_of_magnetic_dipole_moment	—	mag_ratio<185'480'201'566, 100'000'000'000> * mag_power<10, -23> * si::joule / si::tesla	mag_ratio<56, 10> * mag_power<10, -33> * si::joule / si::tesla
codata2018::atomic_unit_of_magnetic_flux_density	atomic_unit_of_magnetic_flux_density	—	mag_ratio<235'051'756'758, 100'000'000'000> * mag_power<10, 5> * si::tesla	mag_ratio<71, 10> * mag_power<10, -5> * si::tesla
codata2018::atomic_unit_of_magnetizability	atomic_unit_of_magnetizability	—	mag_ratio<78'910'366'008, 10'000'000'000> * mag_power<10, -29> * si::joule / square(si::tesla)	mag_ratio<48, 10> * mag_power<10, -38> * si::joule / square(si::tesla)
codata2018::atomic_unit_of_mass	m_e	—	alias to codata::codata2022::electron_mass	mag_ratio<28, 10> * mag_power<10, -40> * si::kilogram
codata2018::atomic_unit_of_momentum	atomic_unit_of_momentum	—	mag_ratio<199'285'191'410, 100'000'000'000> * mag_power<10, -24> * si::kilogram * si::metre / si::second	mag_ratio<30, 10> * mag_power<10, -34> * si::kilogram * si::metre / si::second
codata2018::atomic_unit_of_permittivity	atomic_unit_of_permittivity	—	mag_ratio<111'265'005'545, 100'000'000'000> * mag_power<10, -10> * si::farad / si::metre	mag_ratio<17, 10> * mag_power<10, -20> * si::farad / si::metre
codata2018::atomic_unit_of_time	atomic_unit_of_time	—	mag_ratio<24'188'843'265'857, 10'000'000'000'000> * mag_power<10, -17> * si::second	mag_ratio<47, 10> * mag_power<10, -29> * si::second
codata2018::atomic_unit_of_velocity	atomic_unit_of_velocity	—	mag_ratio<218'769'126'364, 100'000'000'000> * mag_power<10, 6> * si::metre / si::second	mag_ratio<33, 10> * mag_power<10, -4> * si::metre / si::second
codata2018::bohr_magneton	μ_B (mu_B)	—	mag_ratio<92'740'100'783, 10'000'000'000> * mag_power<10, -24> * si::joule / si::tesla	mag_ratio<28, 10> * mag_power<10, -33> * si::joule / si::tesla
codata2018::bohr_radius	a_0	—	mag_ratio<529'177'210'903, 100'000'000'000> * mag_power<10, -11> * si::metre	mag_ratio<80, 10> * mag_power<10, -21> * si::metre
codata2018::characteristic_impedance_of_vacuum	Z_0	—	mag_ratio<376'730'313'668, 1'000'000'000> * si::ohm	mag_ratio<57, 10> * mag_power<10, -8> * si::ohm
codata2018::classical_electron_radius	r_e	—	mag_ratio<28'179'403'262, 10'000'000'000> * mag_power<10, -15> * si::metre	mag_ratio<13, 10> * mag_power<10, -24> * si::metre
codata2018::conductance_quantum	G_0	—	mag<2> * square(elementary_charge) / planck_constant	—
codata2018::conventional_value_of_ampere_90	conventional_value_of_ampere_90	—	conventional_value_of_josephson_constant / josephson_constant * conventional_value_of_von_klitzing_constant / von_klitzing_constant * si::ampere	—
codata2018::conventional_value_of_coulomb_90	conventional_value_of_coulomb_90	—	conventional_value_of_josephson_constant / josephson_constant * conventional_value_of_von_klitzing_constant / von_klitzing_constant * si::coulomb	—
codata2018::conventional_value_of_farad_90	conventional_value_of_farad_90	—	conventional_value_of_von_klitzing_constant / von_klitzing_constant * si::farad	—
codata2018::conventional_value_of_henry_90	conventional_value_of_henry_90	—	von_klitzing_constant / conventional_value_of_von_klitzing_constant * si::henry	—
codata2018::conventional_value_of_ohm_90	conventional_value_of_ohm_90	—	von_klitzing_constant / conventional_value_of_von_klitzing_constant * si::ohm	—
codata2018::conventional_value_of_volt_90	conventional_value_of_volt_90	—	conventional_value_of_josephson_constant / josephson_constant * si::volt	—
codata2018::conventional_value_of_watt_90	conventional_value_of_watt_90	—	square(conventional_value_of_josephson_constant / josephson_constant) * conventional_value_of_von_klitzing_constant / von_klitzing_constant * si::watt	—
codata2018::copper_x_unit	copper_x_unit	—	mag_ratio<100'207'697, 100'000'000> * mag_power<10, -13> * si::metre	mag_ratio<28, 10> * mag_power<10, -20> * si::metre
codata2018::deuteron_electron_magnetic_moment_ratio	deuteron_electron_magnetic_moment_ratio	—	-mag_ratio<4'664'345'551, 1'000'000'000> * mag_power<10, -4> * one	mag_ratio<12, 10> * mag_power<10, -12> * one
codata2018::deuteron_electron_mass_ratio	deuteron_electron_mass_ratio	—	mag_ratio<367'048'296'788, 100'000'000> * one	mag_ratio<13, 10> * mag_power<10, -7> * one
codata2018::deuteron_g_factor	g_d	—	mag_ratio<8'574'382'338, 10'000'000'000> * one	mag_ratio<22, 10> * mag_power<10, -9> * one
codata2018::deuteron_magnetic_moment	μ_d (mu_d)	—	mag_ratio<4'330'735'094, 1'000'000'000> * mag_power<10, -27> * si::joule / si::tesla	mag_ratio<11, 10> * mag_power<10, -35> * si::joule / si::tesla
codata2018::deuteron_magnetic_moment_to_bohr_magneton_ratio	deuteron_magnetic_moment_to_bohr_magneton_ratio	—	mag_ratio<4'669'754'570, 1'000'000'000> * mag_power<10, -4> * one	mag_ratio<12, 10> * mag_power<10, -12> * one
codata2018::deuteron_magnetic_moment_to_nuclear_magneton_ratio	deuteron_magnetic_moment_to_nuclear_magneton_ratio	—	mag_ratio<8'574'382'338, 10'000'000'000> * one	mag_ratio<22, 10> * mag_power<10, -9> * one
codata2018::deuteron_mass	m_d	—	mag_ratio<33'435'837'724, 10'000'000'000> * mag_power<10, -27> * si::kilogram	mag_ratio<10, 10> * mag_power<10, -36> * si::kilogram
codata2018::deuteron_molar_mass	deuteron_molar_mass	—	mag_ratio<201'355'321'205, 100'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<61, 10> * mag_power<10, -13> * si::kilogram / si::mole
codata2018::deuteron_neutron_magnetic_moment_ratio	deuteron_neutron_magnetic_moment_ratio	—	-mag_ratio<44'820'653, 100'000'000> * one	mag_ratio<11, 10> * mag_power<10, -7> * one
codata2018::deuteron_proton_magnetic_moment_ratio	deuteron_proton_magnetic_moment_ratio	—	mag_ratio<30'701'220'939, 100'000'000'000> * one	mag_ratio<79, 10> * mag_power<10, -10> * one
codata2018::deuteron_proton_mass_ratio	deuteron_proton_mass_ratio	—	mag_ratio<199'900'750'139, 100'000'000'000> * one	mag_ratio<11, 10> * mag_power<10, -10> * one
codata2018::deuteron_relative_atomic_mass	deuteron_relative_atomic_mass	—	mag_ratio<2'013'553'212'745, 1'000'000'000'000> * one	mag_ratio<40, 10> * mag_power<10, -11> * one
codata2018::deuteron_rms_charge_radius	r_d	—	mag_ratio<212'799, 100'000> * mag_power<10, -15> * si::metre	mag_ratio<74, 10> * mag_power<10, -19> * si::metre
codata2018::electron_charge_to_mass_quotient	electron_charge_to_mass_quotient	—	-mag_ratio<175'882'001'076, 100'000'000'000> * mag_power<10, 11> * si::coulomb / si::kilogram	mag_ratio<53, 10> * mag_power<10, 1> * si::coulomb / si::kilogram
codata2018::electron_compton_wavelength	λ_C (lambda_C)	—	mag_ratio<242'631'023'867, 100'000'000'000> * mag_power<10, -12> * si::metre	mag_ratio<73, 10> * mag_power<10, -22> * si::metre
codata2018::electron_deuteron_magnetic_moment_ratio	electron_deuteron_magnetic_moment_ratio	—	-mag_ratio<21'439'234'915, 10'000'000> * one	mag_ratio<56, 10> * mag_power<10, -6> * one
codata2018::electron_deuteron_mass_ratio	electron_deuteron_mass_ratio	—	mag_ratio<2'724'437'107'462, 1'000'000'000'000> * mag_power<10, -4> * one	mag_ratio<96, 10> * mag_power<10, -15> * one
codata2018::electron_g_factor	g_e	—	-mag_ratio<200'231'930'436'256, 100'000'000'000'000> * one	mag_ratio<35, 10> * mag_power<10, -13> * one
codata2018::electron_gyromagnetic_ratio	γ_e (gamma_e)	—	mag_ratio<176'085'963'023, 100'000'000'000> * mag_power<10, 11> * one / si::second / si::tesla	mag_ratio<53, 10> * mag_power<10, 1> * one / si::second / si::tesla
codata2018::electron_helion_mass_ratio	electron_helion_mass_ratio	—	mag_ratio<1'819'543'074'573, 1'000'000'000'000> * mag_power<10, -4> * one	mag_ratio<79, 10> * mag_power<10, -15> * one
codata2018::electron_magnetic_moment	μ_e (mu_e)	—	-mag_ratio<92'847'647'043, 10'000'000'000> * mag_power<10, -24> * si::joule / si::tesla	mag_ratio<28, 10> * mag_power<10, -33> * si::joule / si::tesla
codata2018::electron_magnetic_moment_anomaly	electron_magnetic_moment_anomaly	—	mag_ratio<115'965'218'128, 100'000'000'000> * mag_power<10, -3> * one	mag_ratio<18, 10> * mag_power<10, -13> * one
codata2018::electron_magnetic_moment_to_bohr_magneton_ratio	electron_magnetic_moment_to_bohr_magneton_ratio	—	-mag_ratio<100'115'965'218'128, 100'000'000'000'000> * one	mag_ratio<18, 10> * mag_power<10, -13> * one
codata2018::electron_magnetic_moment_to_nuclear_magneton_ratio	electron_magnetic_moment_to_nuclear_magneton_ratio	—	-mag_ratio<183'828'197'188, 100'000'000> * one	mag_ratio<11, 10> * mag_power<10, -7> * one
codata2018::electron_mass	m_e	—	mag_ratio<91'093'837'015, 10'000'000'000> * mag_power<10, -31> * si::kilogram	mag_ratio<28, 10> * mag_power<10, -40> * si::kilogram
codata2018::electron_molar_mass	electron_molar_mass	—	mag_ratio<54'857'990'888, 10'000'000'000> * mag_power<10, -7> * si::kilogram / si::mole	mag_ratio<17, 10> * mag_power<10, -16> * si::kilogram / si::mole
codata2018::electron_muon_magnetic_moment_ratio	electron_muon_magnetic_moment_ratio	—	mag_ratio<2'067'669'883, 10'000'000> * one	mag_ratio<46, 10> * mag_power<10, -6> * one
codata2018::electron_muon_mass_ratio	electron_muon_mass_ratio	—	mag_ratio<483'633'169, 100'000'000> * mag_power<10, -3> * one	mag_ratio<11, 10> * mag_power<10, -10> * one
codata2018::electron_neutron_magnetic_moment_ratio	electron_neutron_magnetic_moment_ratio	—	mag_ratio<96'092'050, 100'000> * one	mag_ratio<23, 10> * mag_power<10, -4> * one
codata2018::electron_neutron_mass_ratio	electron_neutron_mass_ratio	—	mag_ratio<54'386'734'424, 10'000'000'000> * mag_power<10, -4> * one	mag_ratio<26, 10> * mag_power<10, -13> * one
codata2018::electron_proton_magnetic_moment_ratio	electron_proton_magnetic_moment_ratio	—	-mag_ratio<65'821'068'789, 100'000'000> * one	mag_ratio<20, 10> * mag_power<10, -7> * one
codata2018::electron_proton_mass_ratio	electron_proton_mass_ratio	—	mag_ratio<544'617'021'487, 100'000'000'000> * mag_power<10, -4> * one	mag_ratio<33, 10> * mag_power<10, -14> * one
codata2018::electron_relative_atomic_mass	electron_relative_atomic_mass	—	mag_ratio<548'579'909'065, 100'000'000'000> * mag_power<10, -4> * one	mag_ratio<16, 10> * mag_power<10, -14> * one
codata2018::electron_tau_mass_ratio	electron_tau_mass_ratio	—	mag_ratio<287'585, 100'000> * mag_power<10, -4> * one	mag_ratio<19, 10> * mag_power<10, -8> * one
codata2018::electron_to_alpha_particle_mass_ratio	electron_to_alpha_particle_mass_ratio	—	mag_ratio<1'370'933'554'787, 1'000'000'000'000> * mag_power<10, -4> * one	mag_ratio<45, 10> * mag_power<10, -15> * one
codata2018::electron_to_shielded_helion_magnetic_moment_ratio	electron_to_shielded_helion_magnetic_moment_ratio	—	mag_ratio<864'058'257, 1'000'000> * one	mag_ratio<10, 10> * mag_power<10, -5> * one
codata2018::electron_to_shielded_proton_magnetic_moment_ratio	electron_to_shielded_proton_magnetic_moment_ratio	—	-mag_ratio<6'582'275'971, 10'000'000> * one	mag_ratio<72, 10> * mag_power<10, -6> * one
codata2018::electron_triton_mass_ratio	electron_triton_mass_ratio	—	mag_ratio<1'819'200'062'251, 1'000'000'000'000> * mag_power<10, -4> * one	mag_ratio<90, 10> * mag_power<10, -15> * one
codata2018::elementary_charge_over_h_bar	elementary_charge_over_h_bar	—	elementary_charge / reduced_planck_constant	—
codata2018::faraday_constant	F	—	avogadro_constant * elementary_charge	—
codata2018::fermi_coupling_constant	fermi_coupling_constant	—	mag_ratio<11'663'787, 10'000'000> * mag_power<10, -5> * one / square(si::giga<si::electronvolt>)	mag<6> * mag_power<10, -12> * one / square(si::giga<si::electronvolt>)
codata2018::fine_structure_constant	α (alpha)	—	mag_ratio<72'973'525'693, 10'000'000'000> * mag_power<10, -3> * one	mag_ratio<11, 10> * mag_power<10, -12> * one
codata2018::first_radiation_constant	c_1	—	mag<2> * π * planck_constant * square(speed_of_light_in_vacuum)	—
codata2018::first_radiation_constant_for_spectral_radiance	c_1L	—	mag<2> * planck_constant * square(speed_of_light_in_vacuum) / si::steradian	—
codata2018::hartree_energy	E_h	—	mag_ratio<43'597'447'222'071, 10'000'000'000'000> * mag_power<10, -18> * si::joule	mag_ratio<85, 10> * mag_power<10, -30> * si::joule
codata2018::helion_electron_mass_ratio	helion_electron_mass_ratio	—	mag_ratio<549'588'528'007, 100'000'000> * one	mag_ratio<24, 10> * mag_power<10, -7> * one
codata2018::helion_g_factor	g_h	—	-mag_ratio<4'255'250'615, 1'000'000'000> * one	mag_ratio<50, 10> * mag_power<10, -8> * one
codata2018::helion_magnetic_moment	helion_magnetic_moment	—	-mag_ratio<1'074'617'532, 1'000'000'000> * mag_power<10, -26> * si::joule / si::tesla	mag_ratio<13, 10> * mag_power<10, -34> * si::joule / si::tesla
codata2018::helion_magnetic_moment_to_bohr_magneton_ratio	helion_magnetic_moment_to_bohr_magneton_ratio	—	-mag_ratio<1'158'740'958, 1'000'000'000> * mag_power<10, -3> * one	mag_ratio<14, 10> * mag_power<10, -11> * one
codata2018::helion_magnetic_moment_to_nuclear_magneton_ratio	helion_magnetic_moment_to_nuclear_magneton_ratio	—	-mag_ratio<2'127'625'307, 1'000'000'000> * one	mag_ratio<25, 10> * mag_power<10, -8> * one
codata2018::helion_mass	m_h	—	mag_ratio<50'064'127'796, 10'000'000'000> * mag_power<10, -27> * si::kilogram	mag_ratio<15, 10> * mag_power<10, -36> * si::kilogram
codata2018::helion_molar_mass	helion_molar_mass	—	mag_ratio<301'493'224'613, 100'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<91, 10> * mag_power<10, -13> * si::kilogram / si::mole
codata2018::helion_proton_mass_ratio	helion_proton_mass_ratio	—	mag_ratio<299'315'267'167, 100'000'000'000> * one	mag_ratio<13, 10> * mag_power<10, -10> * one
codata2018::helion_relative_atomic_mass	helion_relative_atomic_mass	—	mag_ratio<3'014'932'247'175, 1'000'000'000'000> * one	mag_ratio<97, 10> * mag_power<10, -11> * one
codata2018::helion_shielding_shift	helion_shielding_shift	—	mag_ratio<5'996'743, 1'000'000> * mag_power<10, -5> * one	mag_ratio<10, 10> * mag_power<10, -10> * one
codata2018::inverse_fine_structure_constant	inverse_fine_structure_constant	—	mag_ratio<137'035'999'084, 1'000'000'000> * one	mag_ratio<21, 10> * mag_power<10, -8> * one
codata2018::inverse_of_conductance_quantum	inverse_of_conductance_quantum	—	planck_constant / (mag<2> * square(elementary_charge))	—
codata2018::josephson_constant	K_J	—	mag<2> * elementary_charge / planck_constant	—
codata2018::lattice_parameter_of_silicon	lattice_parameter_of_silicon	—	mag_ratio<5'431'020'511, 1'000'000'000> * mag_power<10, -10> * si::metre	mag_ratio<89, 10> * mag_power<10, -18> * si::metre
codata2018::lattice_spacing_of_silicon_220	lattice_spacing_of_silicon_220	—	mag_ratio<1'920'155'716, 1'000'000'000> * mag_power<10, -10> * si::metre	mag_ratio<32, 10> * mag_power<10, -18> * si::metre
codata2018::loschmidt_constant_atm	loschmidt_constant_atm	—	mag_ratio<10'132'500, 27'315> * si::pascal / boltzmann_constant / si::kelvin	—
codata2018::loschmidt_constant_stp	n_0	—	mag_ratio<10'000'000, 27'315> * si::pascal / boltzmann_constant / si::kelvin	—
codata2018::magnetic_constant	μ₀ (u_0)	—	mag_ratio<125'663'706'212, 100'000'000'000> * mag_power<10, -6> * si::newton / square(si::ampere)	mag_ratio<19, 10> * mag_power<10, -16> * si::newton / square(si::ampere)
codata2018::magnetic_flux_quantum	Φ₀ (Phi_0)	—	planck_constant / (mag<2> * elementary_charge)	—
codata2018::molar_gas_constant	R	—	avogadro_constant * boltzmann_constant	—
codata2018::molar_mass_constant	M_u	—	mag_ratio<99'999'999'965, 100'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<30, 10> * mag_power<10, -13> * si::kilogram / si::mole
codata2018::molar_mass_of_carbon_12	molar_mass_of_carbon_12	—	mag_ratio<119'999'999'958, 10'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<36, 10> * mag_power<10, -12> * si::kilogram / si::mole
codata2018::molar_planck_constant	N_Ah	—	avogadro_constant * planck_constant	—
codata2018::molar_volume_of_ideal_gas_atm	molar_volume_of_ideal_gas_atm	—	mag_ratio<27'315, 10'132'500> * avogadro_constant * boltzmann_constant * si::kelvin / si::pascal	—
codata2018::molar_volume_of_ideal_gas_stp	molar_volume_of_ideal_gas_stp	—	mag_ratio<27'315, 10'000'000> * avogadro_constant * boltzmann_constant * si::kelvin / si::pascal	—
codata2018::molar_volume_of_silicon	molar_volume_of_silicon	—	mag_ratio<1'205'883'199, 1'000'000'000> * mag_power<10, -5> * cubic(si::metre) / si::mole	mag_ratio<60, 10> * mag_power<10, -13> * cubic(si::metre) / si::mole
codata2018::molybdenum_x_unit	molybdenum_x_unit	—	mag_ratio<100'209'952, 100'000'000> * mag_power<10, -13> * si::metre	mag_ratio<53, 10> * mag_power<10, -20> * si::metre
codata2018::muon_compton_wavelength	muon_compton_wavelength	—	mag_ratio<1'173'444'110, 1'000'000'000> * mag_power<10, -14> * si::metre	mag_ratio<26, 10> * mag_power<10, -22> * si::metre
codata2018::muon_electron_mass_ratio	muon_electron_mass_ratio	—	mag_ratio<2'067'682'830, 10'000'000> * one	mag_ratio<46, 10> * mag_power<10, -6> * one
codata2018::muon_g_factor	g_μ (g_mu)	—	-mag_ratio<20'023'318'418, 10'000'000'000> * one	mag_ratio<13, 10> * mag_power<10, -9> * one
codata2018::muon_magnetic_moment	μ_μ (mu_mu)	—	-mag_ratio<449'044'830, 100'000'000> * mag_power<10, -26> * si::joule / si::tesla	mag_ratio<10, 10> * mag_power<10, -33> * si::joule / si::tesla
codata2018::muon_magnetic_moment_anomaly	muon_magnetic_moment_anomaly	—	mag_ratio<116'592'089, 100'000'000> * mag_power<10, -3> * one	mag_ratio<63, 10> * mag_power<10, -10> * one
codata2018::muon_magnetic_moment_to_bohr_magneton_ratio	muon_magnetic_moment_to_bohr_magneton_ratio	—	-mag_ratio<484'197'047, 100'000'000> * mag_power<10, -3> * one	mag_ratio<11, 10> * mag_power<10, -10> * one
codata2018::muon_magnetic_moment_to_nuclear_magneton_ratio	muon_magnetic_moment_to_nuclear_magneton_ratio	—	-mag_ratio<889'059'703, 100'000'000> * one	mag_ratio<20, 10> * mag_power<10, -7> * one
codata2018::muon_mass	m_μ (m_mu)	—	mag_ratio<1'883'531'627, 1'000'000'000> * mag_power<10, -28> * si::kilogram	mag_ratio<42, 10> * mag_power<10, -36> * si::kilogram
codata2018::muon_molar_mass	muon_molar_mass	—	mag_ratio<1'134'289'259, 1'000'000'000> * mag_power<10, -4> * si::kilogram / si::mole	mag_ratio<25, 10> * mag_power<10, -12> * si::kilogram / si::mole
codata2018::muon_neutron_mass_ratio	muon_neutron_mass_ratio	—	mag_ratio<1'124'545'170, 10'000'000'000> * one	mag_ratio<25, 10> * mag_power<10, -9> * one
codata2018::muon_proton_magnetic_moment_ratio	muon_proton_magnetic_moment_ratio	—	-mag_ratio<3'183'345'142, 1'000'000'000> * one	mag_ratio<71, 10> * mag_power<10, -8> * one
codata2018::muon_proton_mass_ratio	muon_proton_mass_ratio	—	mag_ratio<1'126'095'264, 10'000'000'000> * one	mag_ratio<25, 10> * mag_power<10, -9> * one
codata2018::muon_tau_mass_ratio	muon_tau_mass_ratio	—	mag_ratio<594'635, 100'000> * mag_power<10, -2> * one	mag_ratio<40, 10> * mag_power<10, -6> * one
codata2018::natural_unit_of_action	ℏ (hbar)	—	alias to codata::codata2022::reduced_planck_constant	—
codata2018::natural_unit_of_energy	natural_unit_of_energy	—	mag_ratio<81'871'057'769, 10'000'000'000> * mag_power<10, -14> * si::joule	mag_ratio<25, 10> * mag_power<10, -23> * si::joule
codata2018::natural_unit_of_length	ƛ_C (lambdabar_C)	—	alias to codata::codata2018::reduced_electron_compton_wavelength	mag_ratio<12, 10> * mag_power<10, -22> * si::metre
codata2018::natural_unit_of_mass	m_e	—	alias to codata::codata2022::electron_mass	mag_ratio<28, 10> * mag_power<10, -40> * si::kilogram
codata2018::natural_unit_of_momentum	natural_unit_of_momentum	—	mag_ratio<273'092'453'075, 100'000'000'000> * mag_power<10, -22> * si::kilogram * si::metre / si::second	mag_ratio<82, 10> * mag_power<10, -32> * si::kilogram * si::metre / si::second
codata2018::natural_unit_of_time	natural_unit_of_time	—	mag_ratio<128'808'866'819, 100'000'000'000> * mag_power<10, -21> * si::second	mag_ratio<39, 10> * mag_power<10, -31> * si::second
codata2018::natural_unit_of_velocity	c	—	alias to speed_of_light_in_vacuum	—
codata2018::neutron_compton_wavelength	neutron_compton_wavelength	—	mag_ratio<131'959'090'581, 100'000'000'000> * mag_power<10, -15> * si::metre	mag_ratio<75, 10> * mag_power<10, -25> * si::metre
codata2018::neutron_electron_magnetic_moment_ratio	neutron_electron_magnetic_moment_ratio	—	mag_ratio<104'066'882, 100'000'000> * mag_power<10, -3> * one	mag_ratio<25, 10> * mag_power<10, -10> * one
codata2018::neutron_electron_mass_ratio	neutron_electron_mass_ratio	—	mag_ratio<183'868'366'173, 100'000'000> * one	mag_ratio<89, 10> * mag_power<10, -7> * one
codata2018::neutron_g_factor	g_n	—	-mag_ratio<382'608'545, 100'000'000> * one	mag_ratio<90, 10> * mag_power<10, -7> * one
codata2018::neutron_gyromagnetic_ratio	γ_n (gamma_n)	—	mag_ratio<183'247'171, 100'000'000> * mag_power<10, 8> * one / si::second / si::tesla	mag_ratio<43, 10> * mag_power<10, 1> * one / si::second / si::tesla
codata2018::neutron_magnetic_moment	μ_n (mu_n)	—	-mag_ratio<96'623'651, 10'000'000> * mag_power<10, -27> * si::joule / si::tesla	mag_ratio<23, 10> * mag_power<10, -33> * si::joule / si::tesla
codata2018::neutron_magnetic_moment_to_bohr_magneton_ratio	neutron_magnetic_moment_to_bohr_magneton_ratio	—	-mag_ratio<104'187'563, 100'000'000> * mag_power<10, -3> * one	mag_ratio<25, 10> * mag_power<10, -10> * one
codata2018::neutron_magnetic_moment_to_nuclear_magneton_ratio	neutron_magnetic_moment_to_nuclear_magneton_ratio	—	-mag_ratio<191'304'273, 100'000'000> * one	mag_ratio<45, 10> * mag_power<10, -7> * one
codata2018::neutron_mass	m_n	—	mag_ratio<167'492'749'804, 100'000'000'000> * mag_power<10, -27> * si::kilogram	mag_ratio<95, 10> * mag_power<10, -37> * si::kilogram
codata2018::neutron_molar_mass	neutron_molar_mass	—	mag_ratio<100'866'491'560, 100'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<57, 10> * mag_power<10, -13> * si::kilogram / si::mole
codata2018::neutron_muon_mass_ratio	neutron_muon_mass_ratio	—	mag_ratio<889'248'406, 100'000'000> * one	mag_ratio<20, 10> * mag_power<10, -7> * one
codata2018::neutron_proton_magnetic_moment_ratio	neutron_proton_magnetic_moment_ratio	—	-mag_ratio<68'497'934, 100'000'000> * one	mag_ratio<16, 10> * mag_power<10, -7> * one
codata2018::neutron_proton_mass_difference	neutron_proton_mass_difference	—	mag_ratio<230'557'435, 100'000'000> * mag_power<10, -30> * si::kilogram	mag_ratio<82, 10> * mag_power<10, -37> * si::kilogram
codata2018::neutron_proton_mass_ratio	neutron_proton_mass_ratio	—	mag_ratio<100'137'841'931, 100'000'000'000> * one	mag_ratio<49, 10> * mag_power<10, -10> * one
codata2018::neutron_relative_atomic_mass	neutron_relative_atomic_mass	—	mag_ratio<100'866'491'595, 100'000'000'000> * one	mag_ratio<49, 10> * mag_power<10, -10> * one
codata2018::neutron_tau_mass_ratio	neutron_tau_mass_ratio	—	mag_ratio<528'779, 1'000'000> * one	mag_ratio<36, 10> * mag_power<10, -5> * one
codata2018::neutron_to_shielded_proton_magnetic_moment_ratio	neutron_to_shielded_proton_magnetic_moment_ratio	—	-mag_ratio<68'499'694, 100'000'000> * one	mag_ratio<16, 10> * mag_power<10, -7> * one
codata2018::newtonian_constant_of_gravitation	G	—	mag_ratio<667'430, 100'000> * mag_power<10, -11> * cubic(si::metre) / si::kilogram / square(si::second)	mag_ratio<15, 10> * mag_power<10, -15> * cubic(si::metre) / si::kilogram / square(si::second)
codata2018::nuclear_magneton	μ_N (mu_N)	—	mag_ratio<50'507'837'461, 10'000'000'000> * mag_power<10, -27> * si::joule / si::tesla	mag_ratio<15, 10> * mag_power<10, -36> * si::joule / si::tesla
codata2018::planck_length	l_P	—	mag_ratio<1'616'255, 1'000'000> * mag_power<10, -35> * si::metre	mag_ratio<18, 10> * mag_power<10, -40> * si::metre
codata2018::planck_mass	m_P	—	mag_ratio<2'176'434, 1'000'000> * mag_power<10, -8> * si::kilogram	mag_ratio<24, 10> * mag_power<10, -13> * si::kilogram
codata2018::planck_temperature	T_P	—	mag_ratio<1'416'784, 1'000'000> * mag_power<10, 32> * si::kelvin	mag_ratio<16, 10> * mag_power<10, 27> * si::kelvin
codata2018::planck_time	t_P	—	mag_ratio<5'391'247, 1'000'000> * mag_power<10, -44> * si::second	mag_ratio<60, 10> * mag_power<10, -49> * si::second
codata2018::proton_charge_to_mass_quotient	proton_charge_to_mass_quotient	—	mag_ratio<95'788'331'560, 10'000'000'000> * mag_power<10, 7> * si::coulomb / si::kilogram	mag_ratio<29, 10> * mag_power<10, -2> * si::coulomb / si::kilogram
codata2018::proton_compton_wavelength	proton_compton_wavelength	—	mag_ratio<132'140'985'539, 100'000'000'000> * mag_power<10, -15> * si::metre	mag_ratio<40, 10> * mag_power<10, -25> * si::metre
codata2018::proton_electron_mass_ratio	proton_electron_mass_ratio	—	mag_ratio<183'615'267'343, 100'000'000> * one	mag_ratio<11, 10> * mag_power<10, -7> * one
codata2018::proton_g_factor	g_p	—	mag_ratio<55'856'946'893, 10'000'000'000> * one	mag_ratio<16, 10> * mag_power<10, -9> * one
codata2018::proton_gyromagnetic_ratio	γ_p (gamma_p)	—	mag_ratio<26'752'218'744, 10'000'000'000> * mag_power<10, 8> * one / si::second / si::tesla	mag_ratio<11, 10> * mag_power<10, -1> * one / si::second / si::tesla
codata2018::proton_magnetic_moment	μ_p (mu_p)	—	mag_ratio<141'060'679'736, 100'000'000'000> * mag_power<10, -26> * si::joule / si::tesla	mag_ratio<60, 10> * mag_power<10, -36> * si::joule / si::tesla
codata2018::proton_magnetic_moment_to_bohr_magneton_ratio	proton_magnetic_moment_to_bohr_magneton_ratio	—	mag_ratio<152'103'220'230, 100'000'000'000> * mag_power<10, -3> * one	mag_ratio<46, 10> * mag_power<10, -13> * one
codata2018::proton_magnetic_moment_to_nuclear_magneton_ratio	proton_magnetic_moment_to_nuclear_magneton_ratio	—	mag_ratio<279'284'734'463, 100'000'000'000> * one	mag_ratio<82, 10> * mag_power<10, -10> * one
codata2018::proton_magnetic_shielding_correction	proton_magnetic_shielding_correction	—	mag_ratio<25'689, 10'000> * mag_power<10, -5> * one	mag_ratio<11, 10> * mag_power<10, -8> * one
codata2018::proton_mass	m_p	—	mag_ratio<167'262'192'369, 100'000'000'000> * mag_power<10, -27> * si::kilogram	mag_ratio<51, 10> * mag_power<10, -37> * si::kilogram
codata2018::proton_molar_mass	proton_molar_mass	—	mag_ratio<100'727'646'627, 100'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<31, 10> * mag_power<10, -13> * si::kilogram / si::mole
codata2018::proton_muon_mass_ratio	proton_muon_mass_ratio	—	mag_ratio<888'024'337, 100'000'000> * one	mag_ratio<20, 10> * mag_power<10, -7> * one
codata2018::proton_neutron_magnetic_moment_ratio	proton_neutron_magnetic_moment_ratio	—	-mag_ratio<145'989'805, 100'000'000> * one	mag_ratio<34, 10> * mag_power<10, -7> * one
codata2018::proton_neutron_mass_ratio	proton_neutron_mass_ratio	—	mag_ratio<99'862'347'812, 100'000'000'000> * one	mag_ratio<49, 10> * mag_power<10, -10> * one
codata2018::proton_relative_atomic_mass	proton_relative_atomic_mass	—	mag_ratio<1'007'276'466'621, 1'000'000'000'000> * one	mag_ratio<53, 10> * mag_power<10, -11> * one
codata2018::proton_rms_charge_radius	r_p	—	mag_ratio<8'414, 1'000> * mag_power<10, -16> * si::metre	mag_ratio<19, 10> * mag_power<10, -18> * si::metre
codata2018::proton_tau_mass_ratio	proton_tau_mass_ratio	—	mag_ratio<528'051, 1'000'000> * one	mag_ratio<36, 10> * mag_power<10, -5> * one
codata2018::quantum_of_circulation	quantum_of_circulation	—	mag_ratio<36'369'475'516, 10'000'000'000> * mag_power<10, -4> * square(si::metre) / si::second	mag_ratio<11, 10> * mag_power<10, -13> * square(si::metre) / si::second
codata2018::quantum_of_circulation_times_2	quantum_of_circulation_times_2	—	mag_ratio<72'738'951'032, 10'000'000'000> * mag_power<10, -4> * square(si::metre) / si::second	mag_ratio<22, 10> * mag_power<10, -13> * square(si::metre) / si::second
codata2018::reduced_electron_compton_wavelength	ƛ_C (lambdabar_C)	—	mag_ratio<38'615'926'796, 10'000'000'000> * mag_power<10, -13> * si::metre	mag_ratio<12, 10> * mag_power<10, -22> * si::metre
codata2018::reduced_muon_compton_wavelength	reduced_muon_compton_wavelength	—	mag_ratio<1'867'594'306, 1'000'000'000> * mag_power<10, -15> * si::metre	mag_ratio<42, 10> * mag_power<10, -23> * si::metre
codata2018::reduced_neutron_compton_wavelength	reduced_neutron_compton_wavelength	—	mag_ratio<21'001'941'552, 10'000'000'000> * mag_power<10, -16> * si::metre	mag_ratio<12, 10> * mag_power<10, -25> * si::metre
codata2018::reduced_planck_constant	ℏ (hbar)	—	planck_constant / (mag<2> * π)	—
codata2018::reduced_proton_compton_wavelength	reduced_proton_compton_wavelength	—	mag_ratio<210'308'910'336, 100'000'000'000> * mag_power<10, -16> * si::metre	mag_ratio<64, 10> * mag_power<10, -26> * si::metre
codata2018::reduced_tau_compton_wavelength	reduced_tau_compton_wavelength	—	mag_ratio<1'110'538, 1'000'000> * mag_power<10, -16> * si::metre	mag_ratio<75, 10> * mag_power<10, -21> * si::metre
codata2018::rydberg_constant	R_∞ (R_inf)	—	mag_ratio<10'973'731'568'160, 1'000'000> * one / si::metre	mag_ratio<21, 10> * mag_power<10, -5> * one / si::metre
codata2018::sackur_tetrode_constant_100_kpa	sackur_tetrode_constant_100_kpa	—	-mag_ratio<115'170'753'706, 100'000'000'000> * one	mag_ratio<45, 10> * mag_power<10, -10> * one
codata2018::sackur_tetrode_constant_101_325_kpa	sackur_tetrode_constant_101_325_kpa	—	-mag_ratio<116'487'052'358, 100'000'000'000> * one	mag_ratio<45, 10> * mag_power<10, -10> * one
codata2018::second_radiation_constant	c_2	—	planck_constant * speed_of_light_in_vacuum / boltzmann_constant	—
codata2018::shielded_helion_gyromagnetic_ratio	shielded_helion_gyromagnetic_ratio	—	mag_ratio<2'037'894'569, 1'000'000'000> * mag_power<10, 8> * one / si::second / si::tesla	mag_ratio<24, 10> * one / si::second / si::tesla
codata2018::shielded_helion_magnetic_moment	shielded_helion_magnetic_moment	—	-mag_ratio<1'074'553'090, 1'000'000'000> * mag_power<10, -26> * si::joule / si::tesla	mag_ratio<13, 10> * mag_power<10, -34> * si::joule / si::tesla
codata2018::shielded_helion_magnetic_moment_to_bohr_magneton_ratio	shielded_helion_magnetic_moment_to_bohr_magneton_ratio	—	-mag_ratio<1'158'671'471, 1'000'000'000> * mag_power<10, -3> * one	mag_ratio<14, 10> * mag_power<10, -11> * one
codata2018::shielded_helion_magnetic_moment_to_nuclear_magneton_ratio	shielded_helion_magnetic_moment_to_nuclear_magneton_ratio	—	-mag_ratio<2'127'497'719, 1'000'000'000> * one	mag_ratio<25, 10> * mag_power<10, -8> * one
codata2018::shielded_helion_to_proton_magnetic_moment_ratio	shielded_helion_to_proton_magnetic_moment_ratio	—	-mag_ratio<7'617'665'618, 10'000'000'000> * one	mag_ratio<89, 10> * mag_power<10, -9> * one
codata2018::shielded_helion_to_shielded_proton_magnetic_moment_ratio	shielded_helion_to_shielded_proton_magnetic_moment_ratio	—	-mag_ratio<7'617'861'313, 10'000'000'000> * one	mag_ratio<33, 10> * mag_power<10, -9> * one
codata2018::shielded_proton_gyromagnetic_ratio	shielded_proton_gyromagnetic_ratio	—	mag_ratio<2'675'153'151, 1'000'000'000> * mag_power<10, 8> * one / si::second / si::tesla	mag_ratio<29, 10> * one / si::second / si::tesla
codata2018::shielded_proton_magnetic_moment	shielded_proton_magnetic_moment	—	mag_ratio<1'410'570'560, 1'000'000'000> * mag_power<10, -26> * si::joule / si::tesla	mag_ratio<15, 10> * mag_power<10, -34> * si::joule / si::tesla
codata2018::shielded_proton_magnetic_moment_to_bohr_magneton_ratio	shielded_proton_magnetic_moment_to_bohr_magneton_ratio	—	mag_ratio<1'520'993'128, 1'000'000'000> * mag_power<10, -3> * one	mag_ratio<17, 10> * mag_power<10, -11> * one
codata2018::shielded_proton_magnetic_moment_to_nuclear_magneton_ratio	shielded_proton_magnetic_moment_to_nuclear_magneton_ratio	—	mag_ratio<2'792'775'599, 1'000'000'000> * one	mag_ratio<30, 10> * mag_power<10, -8> * one
codata2018::shielding_difference_of_d_and_p_in_hd	shielding_difference_of_d_and_p_in_hd	—	mag_ratio<20'200, 10'000> * mag_power<10, -8> * one	mag_ratio<20, 10> * mag_power<10, -11> * one
codata2018::shielding_difference_of_t_and_p_in_ht	shielding_difference_of_t_and_p_in_ht	—	mag_ratio<24'140, 10'000> * mag_power<10, -8> * one	mag_ratio<20, 10> * mag_power<10, -11> * one
codata2018::stefan_boltzmann_constant	σ (sigma)	—	mag_ratio<2, 15> * pow<5>(π) * pow<4>(boltzmann_constant) / cubic(planck_constant) / square(speed_of_light_in_vacuum)	—
codata2018::tau_compton_wavelength	tau_compton_wavelength	—	mag_ratio<697'771, 100'000> * mag_power<10, -16> * si::metre	mag_ratio<47, 10> * mag_power<10, -20> * si::metre
codata2018::tau_electron_mass_ratio	tau_electron_mass_ratio	—	mag_ratio<347'723, 100> * one	mag_ratio<23, 10> * mag_power<10, -1> * one
codata2018::tau_mass	m_τ (m_tau)	—	mag_ratio<316'754, 100'000> * mag_power<10, -27> * si::kilogram	mag_ratio<21, 10> * mag_power<10, -31> * si::kilogram
codata2018::tau_molar_mass	tau_molar_mass	—	mag_ratio<190'754, 100'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<13, 10> * mag_power<10, -7> * si::kilogram / si::mole
codata2018::tau_muon_mass_ratio	tau_muon_mass_ratio	—	mag_ratio<168'170, 10'000> * one	mag_ratio<11, 10> * mag_power<10, -3> * one
codata2018::tau_neutron_mass_ratio	tau_neutron_mass_ratio	—	mag_ratio<189'115, 100'000> * one	mag_ratio<13, 10> * mag_power<10, -4> * one
codata2018::tau_proton_mass_ratio	tau_proton_mass_ratio	—	mag_ratio<189'376, 100'000> * one	mag_ratio<13, 10> * mag_power<10, -4> * one
codata2018::thomson_cross_section	σ_e (sigma_e)	—	mag_ratio<66'524'587'321, 10'000'000'000> * mag_power<10, -29> * square(si::metre)	mag_ratio<60, 10> * mag_power<10, -38> * square(si::metre)
codata2018::triton_electron_mass_ratio	triton_electron_mass_ratio	—	mag_ratio<549'692'153'573, 100'000'000> * one	mag_ratio<27, 10> * mag_power<10, -7> * one
codata2018::triton_g_factor	g_t	—	mag_ratio<5'957'924'931, 1'000'000'000> * one	mag_ratio<12, 10> * mag_power<10, -8> * one
codata2018::triton_magnetic_moment	μ_t (mu_t)	—	mag_ratio<15'046'095'202, 10'000'000'000> * mag_power<10, -26> * si::joule / si::tesla	mag_ratio<30, 10> * mag_power<10, -35> * si::joule / si::tesla
codata2018::triton_magnetic_moment_to_bohr_magneton_ratio	triton_magnetic_moment_to_bohr_magneton_ratio	—	mag_ratio<16'223'936'651, 10'000'000'000> * mag_power<10, -3> * one	mag_ratio<32, 10> * mag_power<10, -12> * one
codata2018::triton_magnetic_moment_to_nuclear_magneton_ratio	triton_magnetic_moment_to_nuclear_magneton_ratio	—	mag_ratio<29'789'624'656, 10'000'000'000> * one	mag_ratio<59, 10> * mag_power<10, -9> * one
codata2018::triton_mass	m_t	—	mag_ratio<50'073'567'446, 10'000'000'000> * mag_power<10, -27> * si::kilogram	mag_ratio<15, 10> * mag_power<10, -36> * si::kilogram
codata2018::triton_molar_mass	triton_molar_mass	—	mag_ratio<301'550'071'517, 100'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<92, 10> * mag_power<10, -13> * si::kilogram / si::mole
codata2018::triton_proton_mass_ratio	triton_proton_mass_ratio	—	mag_ratio<299'371'703'414, 100'000'000'000> * one	mag_ratio<15, 10> * mag_power<10, -10> * one
codata2018::triton_relative_atomic_mass	triton_relative_atomic_mass	—	mag_ratio<301'550'071'621, 100'000'000'000> * one	mag_ratio<12, 10> * mag_power<10, -10> * one
codata2018::triton_to_proton_magnetic_moment_ratio	triton_to_proton_magnetic_moment_ratio	—	mag_ratio<10'666'399'191, 10'000'000'000> * one	mag_ratio<21, 10> * mag_power<10, -9> * one
codata2018::unified_atomic_mass_unit	m_u	—	alias to codata::codata2022::atomic_mass_constant	mag_ratio<52, 10> * mag_power<10, -37> * si::kilogram
codata2018::vacuum_electric_permittivity	ε₀ (eps_0)	—	mag_ratio<88'541'878'128, 10'000'000'000> * mag_power<10, -12> * si::farad / si::metre	mag_ratio<13, 10> * mag_power<10, -21> * si::farad / si::metre
codata2018::von_klitzing_constant	R_K	—	planck_constant / square(elementary_charge)	—
codata2018::w_to_z_mass_ratio	w_to_z_mass_ratio	—	mag_ratio<88'153, 100'000> * one	mag_ratio<17, 10> * mag_power<10, -4> * one
codata2018::weak_mixing_angle	weak_mixing_angle	—	mag_ratio<22'290, 100'000> * one	mag_ratio<30, 10> * mag_power<10, -4> * one
codata2018::wien_frequency_displacement_law_constant	b′ (b_prime)	—	wien_x_frequency * boltzmann_constant / planck_constant	—
codata2018::wien_wavelength_displacement_law_constant	b	—	second_radiation_constant / wien_x_wavelength	—
codata2022::alpha_particle_electron_mass_ratio	alpha_particle_electron_mass_ratio	—	mag_ratio<729'429'954'171, 100'000'000> * one	mag_ratio<17, 10> * mag_power<10, -7> * one
codata2022::alpha_particle_mass	m_α (m_alpha)	—	mag_ratio<66'446'573'450, 10'000'000'000> * mag_power<10, -27> * si::kilogram	mag_ratio<21, 10> * mag_power<10, -36> * si::kilogram
codata2022::alpha_particle_molar_mass	alpha_particle_molar_mass	—	mag_ratio<40'015'061'833, 10'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<12, 10> * mag_power<10, -12> * si::kilogram / si::mole
codata2022::alpha_particle_proton_mass_ratio	alpha_particle_proton_mass_ratio	—	mag_ratio<3'972'599'690'252, 1'000'000'000'000> * one	mag_ratio<70, 10> * mag_power<10, -11> * one
codata2022::alpha_particle_relative_atomic_mass	alpha_particle_relative_atomic_mass	—	mag_ratio<4'001'506'179'129, 1'000'000'000'000> * one	mag_ratio<62, 10> * mag_power<10, -11> * one
codata2022::alpha_particle_rms_charge_radius	alpha_particle_rms_charge_radius	—	mag_ratio<16'785, 10'000> * mag_power<10, -15> * si::metre	mag_ratio<21, 10> * mag_power<10, -18> * si::metre
codata2022::angstrom_star	angstrom_star	—	mag_ratio<100'001'495, 100'000'000> * mag_power<10, -10> * si::metre	mag_ratio<90, 10> * mag_power<10, -17> * si::metre
codata2022::atomic_mass_constant	m_u	—	mag_ratio<166'053'906'892, 100'000'000'000> * mag_power<10, -27> * si::kilogram	mag_ratio<52, 10> * mag_power<10, -37> * si::kilogram
codata2022::atomic_unit_of_1st_hyperpolarizability	atomic_unit_of_1st_hyperpolarizability	—	mag_ratio<32'063'612'996, 10'000'000'000> * mag_power<10, -53> * cubic(si::coulomb) * cubic(si::metre) / square(si::joule)	mag_ratio<15, 10> * mag_power<10, -62> * cubic(si::coulomb) * cubic(si::metre) / square(si::joule)
codata2022::atomic_unit_of_2nd_hyperpolarizability	atomic_unit_of_2nd_hyperpolarizability	—	mag_ratio<62'353'799'735, 10'000'000'000> * mag_power<10, -65> * pow<4>(si::coulomb) * pow<4>(si::metre) / cubic(si::joule)	mag_ratio<39, 10> * mag_power<10, -74> * pow<4>(si::coulomb) * pow<4>(si::metre) / cubic(si::joule)
codata2022::atomic_unit_of_action	ℏ (hbar)	—	alias to codata::codata2022::reduced_planck_constant	—
codata2022::atomic_unit_of_charge	e	—	alias to elementary_charge	—
codata2022::atomic_unit_of_charge_density	atomic_unit_of_charge_density	—	mag_ratio<108'120'238'677, 100'000'000'000> * mag_power<10, 12> * si::coulomb / cubic(si::metre)	mag_ratio<51, 10> * mag_power<10, 2> * si::coulomb / cubic(si::metre)
codata2022::atomic_unit_of_current	atomic_unit_of_current	—	mag_ratio<66'236'182'375'082, 10'000'000'000'000> * mag_power<10, -3> * si::ampere	mag_ratio<72, 10> * mag_power<10, -15> * si::ampere
codata2022::atomic_unit_of_electric_dipole_moment	atomic_unit_of_electric_dipole_moment	—	mag_ratio<84'783'536'198, 10'000'000'000> * mag_power<10, -30> * si::coulomb * si::metre	mag_ratio<13, 10> * mag_power<10, -39> * si::coulomb * si::metre
codata2022::atomic_unit_of_electric_field	atomic_unit_of_electric_field	—	mag_ratio<514'220'675'112, 100'000'000'000> * mag_power<10, 11> * si::volt / si::metre	mag_ratio<80, 10> * mag_power<10, 1> * si::volt / si::metre
codata2022::atomic_unit_of_electric_field_gradient	atomic_unit_of_electric_field_gradient	—	mag_ratio<97'173'624'424, 10'000'000'000> * mag_power<10, 21> * si::volt / square(si::metre)	mag_ratio<30, 10> * mag_power<10, 12> * si::volt / square(si::metre)
codata2022::atomic_unit_of_electric_polarizability	atomic_unit_of_electric_polarizability	—	mag_ratio<164'877'727'212, 100'000'000'000> * mag_power<10, -41> * square(si::coulomb) * square(si::metre) / si::joule	mag_ratio<51, 10> * mag_power<10, -51> * square(si::coulomb) * square(si::metre) / si::joule
codata2022::atomic_unit_of_electric_potential	atomic_unit_of_electric_potential	—	mag_ratio<27'211'386'245'981, 1'000'000'000'000> * si::volt	mag_ratio<30, 10> * mag_power<10, -11> * si::volt
codata2022::atomic_unit_of_electric_quadrupole_moment	atomic_unit_of_electric_quadrupole_moment	—	mag_ratio<44'865'515'185, 10'000'000'000> * mag_power<10, -40> * si::coulomb * square(si::metre)	mag_ratio<14, 10> * mag_power<10, -49> * si::coulomb * square(si::metre)
codata2022::atomic_unit_of_energy	E_h	—	alias to codata::codata2022::hartree_energy	mag_ratio<48, 10> * mag_power<10, -30> * si::joule
codata2022::atomic_unit_of_force	atomic_unit_of_force	—	mag_ratio<82'387'235'038, 10'000'000'000> * mag_power<10, -8> * si::newton	mag_ratio<13, 10> * mag_power<10, -17> * si::newton
codata2022::atomic_unit_of_length	a_0	—	alias to codata::codata2022::bohr_radius	mag_ratio<82, 10> * mag_power<10, -21> * si::metre
codata2022::atomic_unit_of_magnetic_dipole_moment	atomic_unit_of_magnetic_dipole_moment	—	mag_ratio<185'480'201'315, 100'000'000'000> * mag_power<10, -23> * si::joule / si::tesla	mag_ratio<58, 10> * mag_power<10, -33> * si::joule / si::tesla
codata2022::atomic_unit_of_magnetic_flux_density	atomic_unit_of_magnetic_flux_density	—	mag_ratio<235'051'757'077, 100'000'000'000> * mag_power<10, 5> * si::tesla	mag_ratio<73, 10> * mag_power<10, -5> * si::tesla
codata2022::atomic_unit_of_magnetizability	atomic_unit_of_magnetizability	—	mag_ratio<78'910'365'794, 10'000'000'000> * mag_power<10, -29> * si::joule / square(si::tesla)	mag_ratio<49, 10> * mag_power<10, -38> * si::joule / square(si::tesla)
codata2022::atomic_unit_of_mass	m_e	—	alias to codata::codata2022::electron_mass	mag_ratio<28, 10> * mag_power<10, -40> * si::kilogram
codata2022::atomic_unit_of_momentum	atomic_unit_of_momentum	—	mag_ratio<199'285'191'545, 100'000'000'000> * mag_power<10, -24> * si::kilogram * si::metre / si::second	mag_ratio<31, 10> * mag_power<10, -34> * si::kilogram * si::metre / si::second
codata2022::atomic_unit_of_permittivity	atomic_unit_of_permittivity	—	mag_ratio<111'265'005'620, 100'000'000'000> * mag_power<10, -10> * si::farad / si::metre	mag_ratio<17, 10> * mag_power<10, -20> * si::farad / si::metre
codata2022::atomic_unit_of_time	atomic_unit_of_time	—	mag_ratio<24'188'843'265'864, 10'000'000'000'000> * mag_power<10, -17> * si::second	mag_ratio<26, 10> * mag_power<10, -29> * si::second
codata2022::atomic_unit_of_velocity	atomic_unit_of_velocity	—	mag_ratio<218'769'126'216, 100'000'000'000> * mag_power<10, 6> * si::metre / si::second	mag_ratio<34, 10> * mag_power<10, -4> * si::metre / si::second
codata2022::bohr_magneton	μ_B (mu_B)	—	mag_ratio<92'740'100'657, 10'000'000'000> * mag_power<10, -24> * si::joule / si::tesla	mag_ratio<29, 10> * mag_power<10, -33> * si::joule / si::tesla
codata2022::bohr_radius	a_0	—	mag_ratio<529'177'210'544, 100'000'000'000> * mag_power<10, -11> * si::metre	mag_ratio<82, 10> * mag_power<10, -21> * si::metre
codata2022::characteristic_impedance_of_vacuum	Z_0	—	mag_ratio<376'730'313'412, 1'000'000'000> * si::ohm	mag_ratio<59, 10> * mag_power<10, -8> * si::ohm
codata2022::classical_electron_radius	r_e	—	mag_ratio<28'179'403'205, 10'000'000'000> * mag_power<10, -15> * si::metre	mag_ratio<13, 10> * mag_power<10, -24> * si::metre
codata2022::conductance_quantum	G_0	—	mag<2> * square(elementary_charge) / planck_constant	—
codata2022::conventional_value_of_ampere_90	conventional_value_of_ampere_90	—	conventional_value_of_josephson_constant / josephson_constant * conventional_value_of_von_klitzing_constant / von_klitzing_constant * si::ampere	—
codata2022::conventional_value_of_coulomb_90	conventional_value_of_coulomb_90	—	conventional_value_of_josephson_constant / josephson_constant * conventional_value_of_von_klitzing_constant / von_klitzing_constant * si::coulomb	—
codata2022::conventional_value_of_farad_90	conventional_value_of_farad_90	—	conventional_value_of_von_klitzing_constant / von_klitzing_constant * si::farad	—
codata2022::conventional_value_of_henry_90	conventional_value_of_henry_90	—	von_klitzing_constant / conventional_value_of_von_klitzing_constant * si::henry	—
codata2022::conventional_value_of_ohm_90	conventional_value_of_ohm_90	—	von_klitzing_constant / conventional_value_of_von_klitzing_constant * si::ohm	—
codata2022::conventional_value_of_volt_90	conventional_value_of_volt_90	—	conventional_value_of_josephson_constant / josephson_constant * si::volt	—
codata2022::conventional_value_of_watt_90	conventional_value_of_watt_90	—	square(conventional_value_of_josephson_constant / josephson_constant) * conventional_value_of_von_klitzing_constant / von_klitzing_constant * si::watt	—
codata2022::copper_x_unit	copper_x_unit	—	mag_ratio<100'207'697, 100'000'000> * mag_power<10, -13> * si::metre	mag_ratio<28, 10> * mag_power<10, -20> * si::metre
codata2022::deuteron_electron_magnetic_moment_ratio	deuteron_electron_magnetic_moment_ratio	—	-mag_ratio<4'664'345'550, 1'000'000'000> * mag_power<10, -4> * one	mag_ratio<12, 10> * mag_power<10, -12> * one
codata2022::deuteron_electron_mass_ratio	deuteron_electron_mass_ratio	—	mag_ratio<3'670'482'967'655, 1'000'000'000> * one	mag_ratio<63, 10> * mag_power<10, -8> * one
codata2022::deuteron_g_factor	g_d	—	mag_ratio<8'574'382'335, 10'000'000'000> * one	mag_ratio<22, 10> * mag_power<10, -9> * one
codata2022::deuteron_magnetic_moment	μ_d (mu_d)	—	mag_ratio<4'330'735'087, 1'000'000'000> * mag_power<10, -27> * si::joule / si::tesla	mag_ratio<11, 10> * mag_power<10, -35> * si::joule / si::tesla
codata2022::deuteron_magnetic_moment_to_bohr_magneton_ratio	deuteron_magnetic_moment_to_bohr_magneton_ratio	—	mag_ratio<4'669'754'568, 1'000'000'000> * mag_power<10, -4> * one	mag_ratio<12, 10> * mag_power<10, -12> * one
codata2022::deuteron_magnetic_moment_to_nuclear_magneton_ratio	deuteron_magnetic_moment_to_nuclear_magneton_ratio	—	mag_ratio<8'574'382'335, 10'000'000'000> * one	mag_ratio<22, 10> * mag_power<10, -9> * one
codata2022::deuteron_mass	m_d	—	mag_ratio<33'435'837'768, 10'000'000'000> * mag_power<10, -27> * si::kilogram	mag_ratio<10, 10> * mag_power<10, -36> * si::kilogram
codata2022::deuteron_molar_mass	deuteron_molar_mass	—	mag_ratio<201'355'321'466, 100'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<63, 10> * mag_power<10, -13> * si::kilogram / si::mole
codata2022::deuteron_neutron_magnetic_moment_ratio	deuteron_neutron_magnetic_moment_ratio	—	-mag_ratio<44'820'652, 100'000'000> * one	mag_ratio<11, 10> * mag_power<10, -7> * one
codata2022::deuteron_proton_magnetic_moment_ratio	deuteron_proton_magnetic_moment_ratio	—	mag_ratio<30'701'220'930, 100'000'000'000> * one	mag_ratio<79, 10> * mag_power<10, -10> * one
codata2022::deuteron_proton_mass_ratio	deuteron_proton_mass_ratio	—	mag_ratio<19'990'075'012'699, 10'000'000'000'000> * one	mag_ratio<84, 10> * mag_power<10, -12> * one
codata2022::deuteron_relative_atomic_mass	deuteron_relative_atomic_mass	—	mag_ratio<2'013'553'212'544, 1'000'000'000'000> * one	mag_ratio<15, 10> * mag_power<10, -11> * one
codata2022::deuteron_rms_charge_radius	r_d	—	mag_ratio<212'778, 100'000> * mag_power<10, -15> * si::metre	mag_ratio<27, 10> * mag_power<10, -19> * si::metre
codata2022::electron_charge_to_mass_quotient	electron_charge_to_mass_quotient	—	-mag_ratio<175'882'000'838, 100'000'000'000> * mag_power<10, 11> * si::coulomb / si::kilogram	mag_ratio<55, 10> * mag_power<10, 1> * si::coulomb / si::kilogram
codata2022::electron_compton_wavelength	λ_C (lambda_C)	—	mag_ratio<242'631'023'538, 100'000'000'000> * mag_power<10, -12> * si::metre	mag_ratio<76, 10> * mag_power<10, -22> * si::metre
codata2022::electron_deuteron_magnetic_moment_ratio	electron_deuteron_magnetic_moment_ratio	—	-mag_ratio<21'439'234'921, 10'000'000> * one	mag_ratio<56, 10> * mag_power<10, -6> * one
codata2022::electron_deuteron_mass_ratio	electron_deuteron_mass_ratio	—	mag_ratio<2'724'437'107'629, 1'000'000'000'000> * mag_power<10, -4> * one	mag_ratio<47, 10> * mag_power<10, -15> * one
codata2022::electron_g_factor	g_e	—	-mag_ratio<200'231'930'436'092, 100'000'000'000'000> * one	mag_ratio<36, 10> * mag_power<10, -13> * one
codata2022::electron_gyromagnetic_ratio	γ_e (gamma_e)	—	mag_ratio<176'085'962'784, 100'000'000'000> * mag_power<10, 11> * one / si::second / si::tesla	mag_ratio<55, 10> * mag_power<10, 1> * one / si::second / si::tesla
codata2022::electron_helion_mass_ratio	electron_helion_mass_ratio	—	mag_ratio<1'819'543'074'649, 1'000'000'000'000> * mag_power<10, -4> * one	mag_ratio<53, 10> * mag_power<10, -15> * one
codata2022::electron_magnetic_moment	μ_e (mu_e)	—	-mag_ratio<92'847'646'917, 10'000'000'000> * mag_power<10, -24> * si::joule / si::tesla	mag_ratio<29, 10> * mag_power<10, -33> * si::joule / si::tesla
codata2022::electron_magnetic_moment_anomaly	electron_magnetic_moment_anomaly	—	mag_ratio<115'965'218'046, 100'000'000'000> * mag_power<10, -3> * one	mag_ratio<18, 10> * mag_power<10, -13> * one
codata2022::electron_magnetic_moment_to_bohr_magneton_ratio	electron_magnetic_moment_to_bohr_magneton_ratio	—	-mag_ratio<100'115'965'218'046, 100'000'000'000'000> * one	mag_ratio<18, 10> * mag_power<10, -13> * one
codata2022::electron_magnetic_moment_to_nuclear_magneton_ratio	electron_magnetic_moment_to_nuclear_magneton_ratio	—	-mag_ratio<1'838'281'971'877, 1'000'000'000> * one	mag_ratio<32, 10> * mag_power<10, -8> * one
codata2022::electron_mass	m_e	—	mag_ratio<91'093'837'139, 10'000'000'000> * mag_power<10, -31> * si::kilogram	mag_ratio<28, 10> * mag_power<10, -40> * si::kilogram
codata2022::electron_molar_mass	electron_molar_mass	—	mag_ratio<54'857'990'962, 10'000'000'000> * mag_power<10, -7> * si::kilogram / si::mole	mag_ratio<17, 10> * mag_power<10, -16> * si::kilogram / si::mole
codata2022::electron_muon_magnetic_moment_ratio	electron_muon_magnetic_moment_ratio	—	mag_ratio<2'067'669'881, 10'000'000> * one	mag_ratio<46, 10> * mag_power<10, -6> * one
codata2022::electron_muon_mass_ratio	electron_muon_mass_ratio	—	mag_ratio<483'633'170, 100'000'000> * mag_power<10, -3> * one	mag_ratio<11, 10> * mag_power<10, -10> * one
codata2022::electron_neutron_magnetic_moment_ratio	electron_neutron_magnetic_moment_ratio	—	mag_ratio<96'092'048, 100'000> * one	mag_ratio<23, 10> * mag_power<10, -4> * one
codata2022::electron_neutron_mass_ratio	electron_neutron_mass_ratio	—	mag_ratio<54'386'734'416, 10'000'000'000> * mag_power<10, -4> * one	mag_ratio<22, 10> * mag_power<10, -13> * one
codata2022::electron_proton_magnetic_moment_ratio	electron_proton_magnetic_moment_ratio	—	-mag_ratio<65'821'068'789, 100'000'000> * one	mag_ratio<19, 10> * mag_power<10, -7> * one
codata2022::electron_proton_mass_ratio	electron_proton_mass_ratio	—	mag_ratio<5'446'170'214'889, 1'000'000'000'000> * mag_power<10, -4> * one	mag_ratio<94, 10> * mag_power<10, -15> * one
codata2022::electron_relative_atomic_mass	electron_relative_atomic_mass	—	mag_ratio<5'485'799'090'441, 1'000'000'000'000> * mag_power<10, -4> * one	mag_ratio<97, 10> * mag_power<10, -15> * one
codata2022::electron_tau_mass_ratio	electron_tau_mass_ratio	—	mag_ratio<287'585, 100'000> * mag_power<10, -4> * one	mag_ratio<19, 10> * mag_power<10, -8> * one
codata2022::electron_to_alpha_particle_mass_ratio	electron_to_alpha_particle_mass_ratio	—	mag_ratio<1'370'933'554'733, 1'000'000'000'000> * mag_power<10, -4> * one	mag_ratio<32, 10> * mag_power<10, -15> * one
codata2022::electron_to_shielded_helion_magnetic_moment_ratio	electron_to_shielded_helion_magnetic_moment_ratio	—	mag_ratio<86'405'823'986, 100'000'000> * one	mag_ratio<70, 10> * mag_power<10, -7> * one
codata2022::electron_to_shielded_proton_magnetic_moment_ratio	electron_to_shielded_proton_magnetic_moment_ratio	—	-mag_ratio<6'582'275'856, 10'000'000> * one	mag_ratio<27, 10> * mag_power<10, -6> * one
codata2022::electron_triton_mass_ratio	electron_triton_mass_ratio	—	mag_ratio<1'819'200'062'327, 1'000'000'000'000> * mag_power<10, -4> * one	mag_ratio<68, 10> * mag_power<10, -15> * one
codata2022::elementary_charge_over_h_bar	elementary_charge_over_h_bar	—	elementary_charge / reduced_planck_constant	—
codata2022::faraday_constant	F	—	avogadro_constant * elementary_charge	—
codata2022::fermi_coupling_constant	fermi_coupling_constant	—	mag_ratio<11'663'787, 10'000'000> * mag_power<10, -5> * one / square(si::giga<si::electronvolt>)	mag<6> * mag_power<10, -12> * one / square(si::giga<si::electronvolt>)
codata2022::fine_structure_constant	α (alpha)	—	mag_ratio<72'973'525'643, 10'000'000'000> * mag_power<10, -3> * one	mag_ratio<11, 10> * mag_power<10, -12> * one
codata2022::first_radiation_constant	c_1	—	mag<2> * π * planck_constant * square(speed_of_light_in_vacuum)	—
codata2022::first_radiation_constant_for_spectral_radiance	c_1L	—	mag<2> * planck_constant * square(speed_of_light_in_vacuum) / si::steradian	—
codata2022::hartree_energy	E_h	—	mag_ratio<43'597'447'222'060, 10'000'000'000'000> * mag_power<10, -18> * si::joule	mag_ratio<48, 10> * mag_power<10, -30> * si::joule
codata2022::helion_electron_mass_ratio	helion_electron_mass_ratio	—	mag_ratio<549'588'527'984, 100'000'000> * one	mag_ratio<16, 10> * mag_power<10, -7> * one
codata2022::helion_g_factor	g_h	—	-mag_ratio<42'552'506'995, 10'000'000'000> * one	mag_ratio<34, 10> * mag_power<10, -9> * one
codata2022::helion_magnetic_moment	helion_magnetic_moment	—	-mag_ratio<107'461'755'198, 100'000'000'000> * mag_power<10, -26> * si::joule / si::tesla	mag_ratio<93, 10> * mag_power<10, -36> * si::joule / si::tesla
codata2022::helion_magnetic_moment_to_bohr_magneton_ratio	helion_magnetic_moment_to_bohr_magneton_ratio	—	-mag_ratio<115'874'098'083, 100'000'000'000> * mag_power<10, -3> * one	mag_ratio<94, 10> * mag_power<10, -13> * one
codata2022::helion_magnetic_moment_to_nuclear_magneton_ratio	helion_magnetic_moment_to_nuclear_magneton_ratio	—	-mag_ratio<21'276'253'498, 10'000'000'000> * one	mag_ratio<17, 10> * mag_power<10, -9> * one
codata2022::helion_mass	m_h	—	mag_ratio<50'064'127'862, 10'000'000'000> * mag_power<10, -27> * si::kilogram	mag_ratio<16, 10> * mag_power<10, -36> * si::kilogram
codata2022::helion_molar_mass	helion_molar_mass	—	mag_ratio<301'493'225'010, 100'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<94, 10> * mag_power<10, -13> * si::kilogram / si::mole
codata2022::helion_proton_mass_ratio	helion_proton_mass_ratio	—	mag_ratio<2'993'152'671'552, 1'000'000'000'000> * one	mag_ratio<70, 10> * mag_power<10, -11> * one
codata2022::helion_relative_atomic_mass	helion_relative_atomic_mass	—	mag_ratio<3'014'932'246'932, 1'000'000'000'000> * one	mag_ratio<74, 10> * mag_power<10, -11> * one
codata2022::helion_shielding_shift	helion_shielding_shift	—	mag_ratio<59'967'029, 10'000'000> * mag_power<10, -5> * one	mag_ratio<23, 10> * mag_power<10, -11> * one
codata2022::inverse_fine_structure_constant	inverse_fine_structure_constant	—	mag_ratio<137'035'999'177, 1'000'000'000> * one	mag_ratio<21, 10> * mag_power<10, -8> * one
codata2022::inverse_of_conductance_quantum	inverse_of_conductance_quantum	—	planck_constant / (mag<2> * square(elementary_charge))	—
codata2022::josephson_constant	K_J	—	mag<2> * elementary_charge / planck_constant	—
codata2022::lattice_parameter_of_silicon	lattice_parameter_of_silicon	—	mag_ratio<5'431'020'511, 1'000'000'000> * mag_power<10, -10> * si::metre	mag_ratio<89, 10> * mag_power<10, -18> * si::metre
codata2022::lattice_spacing_of_silicon_220	lattice_spacing_of_silicon_220	—	mag_ratio<1'920'155'716, 1'000'000'000> * mag_power<10, -10> * si::metre	mag_ratio<32, 10> * mag_power<10, -18> * si::metre
codata2022::loschmidt_constant_atm	loschmidt_constant_atm	—	mag_ratio<10'132'500, 27'315> * si::pascal / boltzmann_constant / si::kelvin	—
codata2022::loschmidt_constant_stp	n_0	—	mag_ratio<10'000'000, 27'315> * si::pascal / boltzmann_constant / si::kelvin	—
codata2022::magnetic_constant	μ₀ (u_0)	—	mag_ratio<125'663'706'127, 100'000'000'000> * mag_power<10, -6> * si::newton / square(si::ampere)	mag_ratio<20, 10> * mag_power<10, -16> * si::newton / square(si::ampere)
codata2022::magnetic_flux_quantum	Φ₀ (Phi_0)	—	planck_constant / (mag<2> * elementary_charge)	—
codata2022::molar_gas_constant	R	—	avogadro_constant * boltzmann_constant	—
codata2022::molar_mass_constant	M_u	—	mag_ratio<100'000'000'105, 100'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<31, 10> * mag_power<10, -13> * si::kilogram / si::mole
codata2022::molar_mass_of_carbon_12	molar_mass_of_carbon_12	—	mag_ratio<120'000'000'126, 10'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<37, 10> * mag_power<10, -12> * si::kilogram / si::mole
codata2022::molar_planck_constant	N_Ah	—	avogadro_constant * planck_constant	—
codata2022::molar_volume_of_ideal_gas_atm	molar_volume_of_ideal_gas_atm	—	mag_ratio<27'315, 10'132'500> * avogadro_constant * boltzmann_constant * si::kelvin / si::pascal	—
codata2022::molar_volume_of_ideal_gas_stp	molar_volume_of_ideal_gas_stp	—	mag_ratio<27'315, 10'000'000> * avogadro_constant * boltzmann_constant * si::kelvin / si::pascal	—
codata2022::molar_volume_of_silicon	molar_volume_of_silicon	—	mag_ratio<1'205'883'199, 1'000'000'000> * mag_power<10, -5> * cubic(si::metre) / si::mole	mag_ratio<60, 10> * mag_power<10, -13> * cubic(si::metre) / si::mole
codata2022::molybdenum_x_unit	molybdenum_x_unit	—	mag_ratio<100'209'952, 100'000'000> * mag_power<10, -13> * si::metre	mag_ratio<53, 10> * mag_power<10, -20> * si::metre
codata2022::muon_compton_wavelength	muon_compton_wavelength	—	mag_ratio<1'173'444'110, 1'000'000'000> * mag_power<10, -14> * si::metre	mag_ratio<26, 10> * mag_power<10, -22> * si::metre
codata2022::muon_electron_mass_ratio	muon_electron_mass_ratio	—	mag_ratio<2'067'682'827, 10'000'000> * one	mag_ratio<46, 10> * mag_power<10, -6> * one
codata2022::muon_g_factor	g_μ (g_mu)	—	-mag_ratio<200'233'184'123, 100'000'000'000> * one	mag_ratio<82, 10> * mag_power<10, -10> * one
codata2022::muon_magnetic_moment	μ_μ (mu_mu)	—	-mag_ratio<449'044'830, 100'000'000> * mag_power<10, -26> * si::joule / si::tesla	mag_ratio<10, 10> * mag_power<10, -33> * si::joule / si::tesla
codata2022::muon_magnetic_moment_anomaly	muon_magnetic_moment_anomaly	—	mag_ratio<116'592'062, 100'000'000> * mag_power<10, -3> * one	mag_ratio<41, 10> * mag_power<10, -10> * one
codata2022::muon_magnetic_moment_to_bohr_magneton_ratio	muon_magnetic_moment_to_bohr_magneton_ratio	—	-mag_ratio<484'197'048, 100'000'000> * mag_power<10, -3> * one	mag_ratio<11, 10> * mag_power<10, -10> * one
codata2022::muon_magnetic_moment_to_nuclear_magneton_ratio	muon_magnetic_moment_to_nuclear_magneton_ratio	—	-mag_ratio<889'059'704, 100'000'000> * one	mag_ratio<20, 10> * mag_power<10, -7> * one
codata2022::muon_mass	m_μ (m_mu)	—	mag_ratio<1'883'531'627, 1'000'000'000> * mag_power<10, -28> * si::kilogram	mag_ratio<42, 10> * mag_power<10, -36> * si::kilogram
codata2022::muon_molar_mass	muon_molar_mass	—	mag_ratio<1'134'289'258, 1'000'000'000> * mag_power<10, -4> * si::kilogram / si::mole	mag_ratio<25, 10> * mag_power<10, -12> * si::kilogram / si::mole
codata2022::muon_neutron_mass_ratio	muon_neutron_mass_ratio	—	mag_ratio<1'124'545'168, 10'000'000'000> * one	mag_ratio<25, 10> * mag_power<10, -9> * one
codata2022::muon_proton_magnetic_moment_ratio	muon_proton_magnetic_moment_ratio	—	-mag_ratio<3'183'345'146, 1'000'000'000> * one	mag_ratio<71, 10> * mag_power<10, -8> * one
codata2022::muon_proton_mass_ratio	muon_proton_mass_ratio	—	mag_ratio<1'126'095'262, 10'000'000'000> * one	mag_ratio<25, 10> * mag_power<10, -9> * one
codata2022::muon_tau_mass_ratio	muon_tau_mass_ratio	—	mag_ratio<594'635, 100'000> * mag_power<10, -2> * one	mag_ratio<40, 10> * mag_power<10, -6> * one
codata2022::natural_unit_of_action	ℏ (hbar)	—	alias to codata::codata2022::reduced_planck_constant	—
codata2022::natural_unit_of_energy	natural_unit_of_energy	—	mag_ratio<81'871'057'880, 10'000'000'000> * mag_power<10, -14> * si::joule	mag_ratio<26, 10> * mag_power<10, -23> * si::joule
codata2022::natural_unit_of_length	ƛ_C (lambdabar_C)	—	alias to codata::codata2018::reduced_electron_compton_wavelength	mag_ratio<12, 10> * mag_power<10, -22> * si::metre
codata2022::natural_unit_of_mass	m_e	—	alias to codata::codata2022::electron_mass	mag_ratio<28, 10> * mag_power<10, -40> * si::kilogram
codata2022::natural_unit_of_momentum	natural_unit_of_momentum	—	mag_ratio<273'092'453'446, 100'000'000'000> * mag_power<10, -22> * si::kilogram * si::metre / si::second	mag_ratio<85, 10> * mag_power<10, -32> * si::kilogram * si::metre / si::second
codata2022::natural_unit_of_time	natural_unit_of_time	—	mag_ratio<128'808'866'644, 100'000'000'000> * mag_power<10, -21> * si::second	mag_ratio<40, 10> * mag_power<10, -31> * si::second
codata2022::natural_unit_of_velocity	c	—	alias to speed_of_light_in_vacuum	—
codata2022::neutron_compton_wavelength	neutron_compton_wavelength	—	mag_ratio<131'959'090'382, 100'000'000'000> * mag_power<10, -15> * si::metre	mag_ratio<67, 10> * mag_power<10, -25> * si::metre
codata2022::neutron_electron_magnetic_moment_ratio	neutron_electron_magnetic_moment_ratio	—	mag_ratio<104'066'884, 100'000'000> * mag_power<10, -3> * one	mag_ratio<24, 10> * mag_power<10, -10> * one
codata2022::neutron_electron_mass_ratio	neutron_electron_mass_ratio	—	mag_ratio<183'868'366'200, 100'000'000> * one	mag_ratio<74, 10> * mag_power<10, -7> * one
codata2022::neutron_g_factor	g_n	—	-mag_ratio<382'608'552, 100'000'000> * one	mag_ratio<90, 10> * mag_power<10, -7> * one
codata2022::neutron_gyromagnetic_ratio	γ_n (gamma_n)	—	mag_ratio<183'247'174, 100'000'000> * mag_power<10, 8> * one / si::second / si::tesla	mag_ratio<43, 10> * mag_power<10, 1> * one / si::second / si::tesla
codata2022::neutron_magnetic_moment	μ_n (mu_n)	—	-mag_ratio<96'623'653, 10'000'000> * mag_power<10, -27> * si::joule / si::tesla	mag_ratio<23, 10> * mag_power<10, -33> * si::joule / si::tesla
codata2022::neutron_magnetic_moment_to_bohr_magneton_ratio	neutron_magnetic_moment_to_bohr_magneton_ratio	—	-mag_ratio<104'187'565, 100'000'000> * mag_power<10, -3> * one	mag_ratio<25, 10> * mag_power<10, -10> * one
codata2022::neutron_magnetic_moment_to_nuclear_magneton_ratio	neutron_magnetic_moment_to_nuclear_magneton_ratio	—	-mag_ratio<191'304'276, 100'000'000> * one	mag_ratio<45, 10> * mag_power<10, -7> * one
codata2022::neutron_mass	m_n	—	mag_ratio<167'492'750'056, 100'000'000'000> * mag_power<10, -27> * si::kilogram	mag_ratio<85, 10> * mag_power<10, -37> * si::kilogram
codata2022::neutron_molar_mass	neutron_molar_mass	—	mag_ratio<100'866'491'712, 100'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<51, 10> * mag_power<10, -13> * si::kilogram / si::mole
codata2022::neutron_muon_mass_ratio	neutron_muon_mass_ratio	—	mag_ratio<889'248'408, 100'000'000> * one	mag_ratio<20, 10> * mag_power<10, -7> * one
codata2022::neutron_proton_magnetic_moment_ratio	neutron_proton_magnetic_moment_ratio	—	-mag_ratio<68'497'935, 100'000'000> * one	mag_ratio<16, 10> * mag_power<10, -7> * one
codata2022::neutron_proton_mass_difference	neutron_proton_mass_difference	—	mag_ratio<230'557'461, 100'000'000> * mag_power<10, -30> * si::kilogram	mag_ratio<67, 10> * mag_power<10, -37> * si::kilogram
codata2022::neutron_proton_mass_ratio	neutron_proton_mass_ratio	—	mag_ratio<100'137'841'946, 100'000'000'000> * one	mag_ratio<40, 10> * mag_power<10, -10> * one
codata2022::neutron_relative_atomic_mass	neutron_relative_atomic_mass	—	mag_ratio<100'866'491'606, 100'000'000'000> * one	mag_ratio<40, 10> * mag_power<10, -10> * one
codata2022::neutron_tau_mass_ratio	neutron_tau_mass_ratio	—	mag_ratio<528'779, 1'000'000> * one	mag_ratio<36, 10> * mag_power<10, -5> * one
codata2022::neutron_to_shielded_proton_magnetic_moment_ratio	neutron_to_shielded_proton_magnetic_moment_ratio	—	-mag_ratio<68'499'694, 100'000'000> * one	mag_ratio<16, 10> * mag_power<10, -7> * one
codata2022::newtonian_constant_of_gravitation	G	—	mag_ratio<667'430, 100'000> * mag_power<10, -11> * cubic(si::metre) / si::kilogram / square(si::second)	mag_ratio<15, 10> * mag_power<10, -15> * cubic(si::metre) / si::kilogram / square(si::second)
codata2022::nuclear_magneton	μ_N (mu_N)	—	mag_ratio<50'507'837'393, 10'000'000'000> * mag_power<10, -27> * si::joule / si::tesla	mag_ratio<16, 10> * mag_power<10, -36> * si::joule / si::tesla
codata2022::planck_length	l_P	—	mag_ratio<1'616'255, 1'000'000> * mag_power<10, -35> * si::metre	mag_ratio<18, 10> * mag_power<10, -40> * si::metre
codata2022::planck_mass	m_P	—	mag_ratio<2'176'434, 1'000'000> * mag_power<10, -8> * si::kilogram	mag_ratio<24, 10> * mag_power<10, -13> * si::kilogram
codata2022::planck_temperature	T_P	—	mag_ratio<1'416'784, 1'000'000> * mag_power<10, 32> * si::kelvin	mag_ratio<16, 10> * mag_power<10, 27> * si::kelvin
codata2022::planck_time	t_P	—	mag_ratio<5'391'247, 1'000'000> * mag_power<10, -44> * si::second	mag_ratio<60, 10> * mag_power<10, -49> * si::second
codata2022::proton_charge_to_mass_quotient	proton_charge_to_mass_quotient	—	mag_ratio<95'788'331'430, 10'000'000'000> * mag_power<10, 7> * si::coulomb / si::kilogram	mag_ratio<30, 10> * mag_power<10, -2> * si::coulomb / si::kilogram
codata2022::proton_compton_wavelength	proton_compton_wavelength	—	mag_ratio<132'140'985'360, 100'000'000'000> * mag_power<10, -15> * si::metre	mag_ratio<41, 10> * mag_power<10, -25> * si::metre
codata2022::proton_electron_mass_ratio	proton_electron_mass_ratio	—	mag_ratio<1'836'152'673'426, 1'000'000'000> * one	mag_ratio<32, 10> * mag_power<10, -8> * one
codata2022::proton_g_factor	g_p	—	mag_ratio<55'856'946'893, 10'000'000'000> * one	mag_ratio<16, 10> * mag_power<10, -9> * one
codata2022::proton_gyromagnetic_ratio	γ_p (gamma_p)	—	mag_ratio<26'752'218'708, 10'000'000'000> * mag_power<10, 8> * one / si::second / si::tesla	mag_ratio<11, 10> * mag_power<10, -1> * one / si::second / si::tesla
codata2022::proton_magnetic_moment	μ_p (mu_p)	—	mag_ratio<141'060'679'545, 100'000'000'000> * mag_power<10, -26> * si::joule / si::tesla	mag_ratio<60, 10> * mag_power<10, -36> * si::joule / si::tesla
codata2022::proton_magnetic_moment_to_bohr_magneton_ratio	proton_magnetic_moment_to_bohr_magneton_ratio	—	mag_ratio<152'103'220'230, 100'000'000'000> * mag_power<10, -3> * one	mag_ratio<45, 10> * mag_power<10, -13> * one
codata2022::proton_magnetic_moment_to_nuclear_magneton_ratio	proton_magnetic_moment_to_nuclear_magneton_ratio	—	mag_ratio<279'284'734'463, 100'000'000'000> * one	mag_ratio<82, 10> * mag_power<10, -10> * one
codata2022::proton_magnetic_shielding_correction	proton_magnetic_shielding_correction	—	mag_ratio<256'715, 100'000> * mag_power<10, -5> * one	mag_ratio<41, 10> * mag_power<10, -9> * one
codata2022::proton_mass	m_p	—	mag_ratio<167'262'192'595, 100'000'000'000> * mag_power<10, -27> * si::kilogram	mag_ratio<52, 10> * mag_power<10, -37> * si::kilogram
codata2022::proton_molar_mass	proton_molar_mass	—	mag_ratio<100'727'646'764, 100'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<31, 10> * mag_power<10, -13> * si::kilogram / si::mole
codata2022::proton_muon_mass_ratio	proton_muon_mass_ratio	—	mag_ratio<888'024'338, 100'000'000> * one	mag_ratio<20, 10> * mag_power<10, -7> * one
codata2022::proton_neutron_magnetic_moment_ratio	proton_neutron_magnetic_moment_ratio	—	-mag_ratio<145'989'802, 100'000'000> * one	mag_ratio<34, 10> * mag_power<10, -7> * one
codata2022::proton_neutron_mass_ratio	proton_neutron_mass_ratio	—	mag_ratio<99'862'347'797, 100'000'000'000> * one	mag_ratio<40, 10> * mag_power<10, -10> * one
codata2022::proton_relative_atomic_mass	proton_relative_atomic_mass	—	mag_ratio<10'072'764'665'789, 10'000'000'000'000> * one	mag_ratio<83, 10> * mag_power<10, -12> * one
codata2022::proton_rms_charge_radius	r_p	—	mag_ratio<84'075, 10'000> * mag_power<10, -16> * si::metre	mag_ratio<64, 10> * mag_power<10, -19> * si::metre
codata2022::proton_tau_mass_ratio	proton_tau_mass_ratio	—	mag_ratio<528'051, 1'000'000> * one	mag_ratio<36, 10> * mag_power<10, -5> * one
codata2022::quantum_of_circulation	quantum_of_circulation	—	mag_ratio<36'369'475'467, 10'000'000'000> * mag_power<10, -4> * square(si::metre) / si::second	mag_ratio<11, 10> * mag_power<10, -13> * square(si::metre) / si::second
codata2022::quantum_of_circulation_times_2	quantum_of_circulation_times_2	—	mag_ratio<72'738'950'934, 10'000'000'000> * mag_power<10, -4> * square(si::metre) / si::second	mag_ratio<23, 10> * mag_power<10, -13> * square(si::metre) / si::second
codata2022::reduced_electron_compton_wavelength	ƛ_C (lambdabar_C)	—	mag_ratio<38'615'926'744, 10'000'000'000> * mag_power<10, -13> * si::metre	mag_ratio<12, 10> * mag_power<10, -22> * si::metre
codata2022::reduced_muon_compton_wavelength	reduced_muon_compton_wavelength	—	mag_ratio<1'867'594'306, 1'000'000'000> * mag_power<10, -15> * si::metre	mag_ratio<42, 10> * mag_power<10, -23> * si::metre
codata2022::reduced_neutron_compton_wavelength	reduced_neutron_compton_wavelength	—	mag_ratio<21'001'941'520, 10'000'000'000> * mag_power<10, -16> * si::metre	mag_ratio<11, 10> * mag_power<10, -25> * si::metre
codata2022::reduced_planck_constant	ℏ (hbar)	—	planck_constant / (mag<2> * π)	—
codata2022::reduced_proton_compton_wavelength	reduced_proton_compton_wavelength	—	mag_ratio<210'308'910'051, 100'000'000'000> * mag_power<10, -16> * si::metre	mag_ratio<66, 10> * mag_power<10, -26> * si::metre
codata2022::reduced_tau_compton_wavelength	reduced_tau_compton_wavelength	—	mag_ratio<1'110'538, 1'000'000> * mag_power<10, -16> * si::metre	mag_ratio<75, 10> * mag_power<10, -21> * si::metre
codata2022::rydberg_constant	R_∞ (R_inf)	—	mag_ratio<10'973'731'568'157, 1'000'000> * one / si::metre	mag_ratio<12, 10> * mag_power<10, -5> * one / si::metre
codata2022::sackur_tetrode_constant_100_kpa	sackur_tetrode_constant_100_kpa	—	-mag_ratio<115'170'753'496, 100'000'000'000> * one	mag_ratio<47, 10> * mag_power<10, -10> * one
codata2022::sackur_tetrode_constant_101_325_kpa	sackur_tetrode_constant_101_325_kpa	—	-mag_ratio<116'487'052'149, 100'000'000'000> * one	mag_ratio<47, 10> * mag_power<10, -10> * one
codata2022::second_radiation_constant	c_2	—	planck_constant * speed_of_light_in_vacuum / boltzmann_constant	—
codata2022::shielded_helion_gyromagnetic_ratio	shielded_helion_gyromagnetic_ratio	—	mag_ratio<20'378'946'078, 10'000'000'000> * mag_power<10, 8> * one / si::second / si::tesla	mag_ratio<18, 10> * mag_power<10, -1> * one / si::second / si::tesla
codata2022::shielded_helion_magnetic_moment	shielded_helion_magnetic_moment	—	-mag_ratio<107'455'311'035, 100'000'000'000> * mag_power<10, -26> * si::joule / si::tesla	mag_ratio<93, 10> * mag_power<10, -36> * si::joule / si::tesla
codata2022::shielded_helion_magnetic_moment_to_bohr_magneton_ratio	shielded_helion_magnetic_moment_to_bohr_magneton_ratio	—	-mag_ratio<115'867'149'457, 100'000'000'000> * mag_power<10, -3> * one	mag_ratio<94, 10> * mag_power<10, -13> * one
codata2022::shielded_helion_magnetic_moment_to_nuclear_magneton_ratio	shielded_helion_magnetic_moment_to_nuclear_magneton_ratio	—	-mag_ratio<21'274'977'624, 10'000'000'000> * one	mag_ratio<17, 10> * mag_power<10, -9> * one
codata2022::shielded_helion_to_proton_magnetic_moment_ratio	shielded_helion_to_proton_magnetic_moment_ratio	—	-mag_ratio<76'176'657'721, 100'000'000'000> * one	mag_ratio<66, 10> * mag_power<10, -10> * one
codata2022::shielded_helion_to_shielded_proton_magnetic_moment_ratio	shielded_helion_to_shielded_proton_magnetic_moment_ratio	—	-mag_ratio<7'617'861'334, 10'000'000'000> * one	mag_ratio<31, 10> * mag_power<10, -9> * one
codata2022::shielded_proton_gyromagnetic_ratio	shielded_proton_gyromagnetic_ratio	—	mag_ratio<2'675'153'194, 1'000'000'000> * mag_power<10, 8> * one / si::second / si::tesla	mag_ratio<11, 10> * one / si::second / si::tesla
codata2022::shielded_proton_magnetic_moment	shielded_proton_magnetic_moment	—	mag_ratio<14'105'705'830, 10'000'000'000> * mag_power<10, -26> * si::joule / si::tesla	mag_ratio<58, 10> * mag_power<10, -35> * si::joule / si::tesla
codata2022::shielded_proton_magnetic_moment_to_bohr_magneton_ratio	shielded_proton_magnetic_moment_to_bohr_magneton_ratio	—	mag_ratio<15'209'931'551, 10'000'000'000> * mag_power<10, -3> * one	mag_ratio<62, 10> * mag_power<10, -12> * one
codata2022::shielded_proton_magnetic_moment_to_nuclear_magneton_ratio	shielded_proton_magnetic_moment_to_nuclear_magneton_ratio	—	mag_ratio<2'792'775'648, 1'000'000'000> * one	mag_ratio<11, 10> * mag_power<10, -8> * one
codata2022::shielding_difference_of_d_and_p_in_hd	shielding_difference_of_d_and_p_in_hd	—	mag_ratio<198'770, 100'000> * mag_power<10, -8> * one	mag_ratio<10, 10> * mag_power<10, -12> * one
codata2022::shielding_difference_of_t_and_p_in_ht	shielding_difference_of_t_and_p_in_ht	—	mag_ratio<239'450, 100'000> * mag_power<10, -8> * one	mag_ratio<20, 10> * mag_power<10, -12> * one
codata2022::stefan_boltzmann_constant	σ (sigma)	—	mag_ratio<2, 15> * pow<5>(π) * pow<4>(boltzmann_constant) / cubic(planck_constant) / square(speed_of_light_in_vacuum)	—
codata2022::tau_compton_wavelength	tau_compton_wavelength	—	mag_ratio<697'771, 100'000> * mag_power<10, -16> * si::metre	mag_ratio<47, 10> * mag_power<10, -20> * si::metre
codata2022::tau_electron_mass_ratio	tau_electron_mass_ratio	—	mag_ratio<347'723, 100> * one	mag_ratio<23, 10> * mag_power<10, -1> * one
codata2022::tau_mass	m_τ (m_tau)	—	mag_ratio<316'754, 100'000> * mag_power<10, -27> * si::kilogram	mag_ratio<21, 10> * mag_power<10, -31> * si::kilogram
codata2022::tau_molar_mass	tau_molar_mass	—	mag_ratio<190'754, 100'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<13, 10> * mag_power<10, -7> * si::kilogram / si::mole
codata2022::tau_muon_mass_ratio	tau_muon_mass_ratio	—	mag_ratio<168'170, 10'000> * one	mag_ratio<11, 10> * mag_power<10, -3> * one
codata2022::tau_neutron_mass_ratio	tau_neutron_mass_ratio	—	mag_ratio<189'115, 100'000> * one	mag_ratio<13, 10> * mag_power<10, -4> * one
codata2022::tau_proton_mass_ratio	tau_proton_mass_ratio	—	mag_ratio<189'376, 100'000> * one	mag_ratio<13, 10> * mag_power<10, -4> * one
codata2022::thomson_cross_section	σ_e (sigma_e)	—	mag_ratio<66'524'587'051, 10'000'000'000> * mag_power<10, -29> * square(si::metre)	mag_ratio<62, 10> * mag_power<10, -38> * square(si::metre)
codata2022::triton_electron_mass_ratio	triton_electron_mass_ratio	—	mag_ratio<549'692'153'551, 100'000'000> * one	mag_ratio<21, 10> * mag_power<10, -7> * one
codata2022::triton_g_factor	g_t	—	mag_ratio<5'957'924'930, 1'000'000'000> * one	mag_ratio<12, 10> * mag_power<10, -8> * one
codata2022::triton_magnetic_moment	μ_t (mu_t)	—	mag_ratio<15'046'095'178, 10'000'000'000> * mag_power<10, -26> * si::joule / si::tesla	mag_ratio<30, 10> * mag_power<10, -35> * si::joule / si::tesla
codata2022::triton_magnetic_moment_to_bohr_magneton_ratio	triton_magnetic_moment_to_bohr_magneton_ratio	—	mag_ratio<16'223'936'648, 10'000'000'000> * mag_power<10, -3> * one	mag_ratio<32, 10> * mag_power<10, -12> * one
codata2022::triton_magnetic_moment_to_nuclear_magneton_ratio	triton_magnetic_moment_to_nuclear_magneton_ratio	—	mag_ratio<29'789'624'650, 10'000'000'000> * one	mag_ratio<59, 10> * mag_power<10, -9> * one
codata2022::triton_mass	m_t	—	mag_ratio<50'073'567'512, 10'000'000'000> * mag_power<10, -27> * si::kilogram	mag_ratio<16, 10> * mag_power<10, -36> * si::kilogram
codata2022::triton_molar_mass	triton_molar_mass	—	mag_ratio<301'550'071'913, 100'000'000'000> * mag_power<10, -3> * si::kilogram / si::mole	mag_ratio<94, 10> * mag_power<10, -13> * si::kilogram / si::mole
codata2022::triton_proton_mass_ratio	triton_proton_mass_ratio	—	mag_ratio<299'371'703'403, 100'000'000'000> * one	mag_ratio<10, 10> * mag_power<10, -10> * one
codata2022::triton_relative_atomic_mass	triton_relative_atomic_mass	—	mag_ratio<301'550'071'597, 100'000'000'000> * one	mag_ratio<10, 10> * mag_power<10, -10> * one
codata2022::triton_to_proton_magnetic_moment_ratio	triton_to_proton_magnetic_moment_ratio	—	mag_ratio<10'666'399'189, 10'000'000'000> * one	mag_ratio<21, 10> * mag_power<10, -9> * one
codata2022::unified_atomic_mass_unit	m_u	—	alias to codata::codata2022::atomic_mass_constant	mag_ratio<52, 10> * mag_power<10, -37> * si::kilogram
codata2022::vacuum_electric_permittivity	ε₀ (eps_0)	—	mag_ratio<88'541'878'188, 10'000'000'000> * mag_power<10, -12> * si::farad / si::metre	mag_ratio<14, 10> * mag_power<10, -21> * si::farad / si::metre
codata2022::von_klitzing_constant	R_K	—	planck_constant / square(elementary_charge)	—
codata2022::w_to_z_mass_ratio	w_to_z_mass_ratio	—	mag_ratio<88'145, 100'000> * one	mag_ratio<13, 10> * mag_power<10, -4> * one
codata2022::weak_mixing_angle	weak_mixing_angle	—	mag_ratio<22'305, 100'000> * one	mag_ratio<23, 10> * mag_power<10, -4> * one
codata2022::wien_frequency_displacement_law_constant	b′ (b_prime)	—	wien_x_frequency * boltzmann_constant / planck_constant	—
codata2022::wien_wavelength_displacement_law_constant	b	—	second_radiation_constant / wien_x_wavelength	—
conventional_value_of_josephson_constant	K_J-90	—	mag_ratio<4'835'979, 10> * mag_power<10, 9> * si::hertz / si::volt	—
conventional_value_of_von_klitzing_constant	R_K-90	—	mag_ratio<25'812'807, 1'000> * si::ohm	—
elementary_charge	e	—	alias to si::si2019::elementary_charge	—
hyperfine_structure_transition_frequency_of_cs	Δν_Cs (dv_Cs)	—	alias to si::si2019::hyperfine_structure_transition_frequency_of_cs	—
luminous_efficacy	K_cd	—	alias to si::si2019::luminous_efficacy	—
planck_constant	h	—	alias to si::si2019::planck_constant	—
speed_of_light_in_vacuum	c	—	alias to si::si2019::speed_of_light_in_vacuum	—
standard_atmosphere	atm	—	mag<101'325> * si::pascal	—
standard_gravity	g₀ (g_0)	—	mag_ratio<980'665, 100'000> * si::metre / square(si::second)	—
standard_state_pressure	standard_state_pressure	—	mag<100'000> * si::pascal	—
wien_x_frequency	x_ν (x_nu)	—	mag * one	—
wien_x_wavelength	x_λ (x_lambda)	—	mag * one	—

Constants with a standard uncertainty are measured rather than exact by definition, and satisfy the MeasuredConstant concept. The uncertainty is stated in the form its source publishes: an absolute value in the constant's own dimension, or a relative one (marked (relative)) when only that form is published. A — means no uncertainty is declared for that constant.

Inline Namespaces

The mp_units::codata::codata2022 namespace is inline in mp_units::codata, making its members directly accessible from the parent namespace.