codata

NAME
LIBRARY
SYNOPSIS
DESCRIPTION
NOTES
EXAMPLE
SEE ALSO
CODATA 2022
CODATA 2018
CODATA 2014
CODATA 2010

NAME

codata - libray for fundamental physical constants

LIBRARY

Codata library (libcodata, -lcodata)

SYNOPSIS

Fortran

use codata

C

#include "codata.h"

Python

import pycodata

DESCRIPTION

codata is a Fortran library providing the fundamental physical constants published by the CODATA. It includes the 2022, 2018, 2014 and 2010 recommended values, allowing applications to reproduce calculations based on specific CODATA releases.

The constants are implemented as a derived type that carries: the name, the value, the uncertainty, and the unit. All the constants are provided as double precision reals. Long constant names can be aliased with shorter names.

It provides:

CODATA 2022 constants

CODATA 2018 constants

CODATA 2014 constants

CODATA 2010 constants

Native Fortran API

C interoperability API

Python bindings

Fortran API

exposes the constants as derived type codata_constant_type which carries the name, the value, the uncertainty, and the unit.

C API

exposes a structure codata_constant_type that defines the same members as in Fortran i.e. the name, the value, the uncertainty, and the unit.

Python

exposes a dictionary with the keys being the name, the value, the uncertainty, and the unit.

NOTES

The latest values (2022) do not have the year as a suffix in their name whereas older values (2010, 2014, 2018) feature the year as a suffix. All constants are declared with the same variable name in Fortran, C, and Python.

[1]

P. J. Mohr, B. N. Taylor, and D. B. Newell,

“CODATA Recommended Values of the Fundamental Physical Constants: 2010,”
Review of Modern Physics, vol. 84, 2012.

[2]

P. J. Mohr, B. N. Taylor, and D. B. Newell,

“CODATA Recommended Values of the Fundamental Physical Constants: 2014,”
Journal of Physical and Chemical Reference Data, vol. 45, 2016.

[3]

P. J. Mohr, B. N. Taylor, and D. B. Newell, “CODATA Recommended Values of the Fundamental Physical Constants: 2018,” Review of Modern Physics, vol. 93, 2021.

[4]

P. Mohr, D. Newell, B. Taylor, and E. Tiesinga, “CODATA Recommended Values of the Fundamental Physical Constants: 2022.” Accessed: May 05, 2025. [Online]. Available: https://arxiv.org/abs/2409.03787

[5]

P. J. Mohr, D. B. Newell, B. N. Taylor, and E. Tiesinga, “CODATA Recommended Values of the Fundamental Physical Constants: 2022,” Reviews of Modern Physics, vol. 97, no. 2, p. 25002, Apr. 2025, doi: 10.1103/RevModPhys.97.025002.

EXAMPLE

Example in Fortran
program example_in_f
use codata
implicit none
print ’(A)’, ’########## EXAMPLE IN FORTRAN ##########’
print ’(A)’, ’# VERSION’
print *, "version = ", version()
print ’(A)’, ’# CONSTANTS’
print *, "c = ", SPEED_OF_LIGHT_IN_VACUUM%value
print ’(A)’, ’# UNCERTAINTY’
print *, "u(c) = ", SPEED_OF_LIGHT_IN_VACUUM%uncertainty
print ’(A)’, ’# OLDER VALUES’
print ’(A, F23.16)’, "Mu_2022(latest) = ", MOLAR_MASS_CONSTANT%value
print ’(A, F23.16)’, "Mu_2018 = ", MOLAR_MASS_CONSTANT_2018%value
print ’(A, F23.16)’, "Mu_2014 = ", MOLAR_MASS_CONSTANT_2014%value
print ’(A, F23.16)’, "Mu_2010 = ", MOLAR_MASS_CONSTANT_2010%value
end program

Example in C
#include <stdio.h>
#include "codata.h"

int main(void){
printf("%f", c);
printf("########## EXAMPLE IN C ##########\n");
printf("%s\n","# VERSION");
printf("version = %s\n", codata_version());
printf("%s\n","# CONSTANTS");
printf("c = %f\n", SPEED_OF_LIGHT_IN_VACUUM.value);
printf("%s\n","# UNCERTAINTY");
printf("u(c) = %f\n", SPEED_OF_LIGHT_IN_VACUUM.uncertainty);
printf("%s\n","# OLDER VALUES");
printf("Mu_2022(latest) = %23.16f\n", MOLAR_MASS_CONSTANT.value);
printf("Mu_2018 = %23.16f\n", MOLAR_MASS_CONSTANT_2018.value);
printf("Mu_2014 = %23.16f\n", MOLAR_MASS_CONSTANT_2014.value);
printf("Mu_2010 = %23.16f\n", MOLAR_MASS_CONSTANT_2010.value);
return 0;
}

Example in Python
import sys
sys.path.insert(0, "../py/src/")
import pycodata
print("########## EXAMPLE IN PYTHON ##########")
print("# VERSION")
print(f"version = {pycodata.__version__}")
print("# Constants")
print("c =", pycodata.SPEED_OF_LIGHT_IN_VACUUM["value"])
print("# UNCERTAINTY")
print("u(c) = ", pycodata.SPEED_OF_LIGHT_IN_VACUUM["uncertainty"])
print("# OLDER VALUES")
print("Mu_2022 = ", pycodata.MOLAR_MASS_CONSTANT["value"])
print("Mu_2018 = ", pycodata.MOLAR_MASS_CONSTANT_2018["value"])
print("Mu_2014 = ", pycodata.MOLAR_MASS_CONSTANT_2014["value"])
print("Mu_2010 = ", pycodata.MOLAR_MASS_CONSTANT_2010["value"])

SEE ALSO

codata(3), codata_cli(1), codata_version(3), codata_constant_type(3)

CODATA 2022

List of available constants:

ALPHA_PARTICLE_ELECTRON_MASS_RATIO

ALPHA_PARTICLE_MASS

ALPHA_PARTICLE_MASS_ENERGY_EQUIVALENT

ALPHA_PARTICLE_MASS_ENERGY_EQUIVALENT_IN_MEV

ALPHA_PARTICLE_MASS_IN_U

ALPHA_PARTICLE_MOLAR_MASS

ALPHA_PARTICLE_PROTON_MASS_RATIO

ALPHA_PARTICLE_RELATIVE_ATOMIC_MASS

ALPHA_PARTICLE_RMS_CHARGE_RADIUS

ANGSTROM_STAR

ATOMIC_MASS_CONSTANT

ATOMIC_MASS_CONSTANT_ENERGY_EQUIVALENT

ATOMIC_MASS_CONSTANT_ENERGY_EQUIVALENT_IN_MEV

ATOMIC_MASS_UNIT_ELECTRON_VOLT_RELATIONSHIP

ATOMIC_MASS_UNIT_HARTREE_RELATIONSHIP

ATOMIC_MASS_UNIT_HERTZ_RELATIONSHIP

ATOMIC_MASS_UNIT_INVERSE_METER_RELATIONSHIP

ATOMIC_MASS_UNIT_JOULE_RELATIONSHIP

ATOMIC_MASS_UNIT_KELVIN_RELATIONSHIP

ATOMIC_MASS_UNIT_KILOGRAM_RELATIONSHIP

ATOMIC_UNIT_OF_1ST_HYPERPOLARIZABILITY

ATOMIC_UNIT_OF_2ND_HYPERPOLARIZABILITY

ATOMIC_UNIT_OF_ACTION

ATOMIC_UNIT_OF_CHARGE

ATOMIC_UNIT_OF_CHARGE_DENSITY

ATOMIC_UNIT_OF_CURRENT

ATOMIC_UNIT_OF_ELECTRIC_DIPOLE_MOM

ATOMIC_UNIT_OF_ELECTRIC_FIELD

ATOMIC_UNIT_OF_ELECTRIC_FIELD_GRADIENT

ATOMIC_UNIT_OF_ELECTRIC_POLARIZABILITY

ATOMIC_UNIT_OF_ELECTRIC_POTENTIAL

ATOMIC_UNIT_OF_ELECTRIC_QUADRUPOLE_MOM

ATOMIC_UNIT_OF_ENERGY

ATOMIC_UNIT_OF_FORCE

ATOMIC_UNIT_OF_LENGTH

ATOMIC_UNIT_OF_MAG_DIPOLE_MOM

ATOMIC_UNIT_OF_MAG_FLUX_DENSITY

ATOMIC_UNIT_OF_MAGNETIZABILITY

ATOMIC_UNIT_OF_MASS

ATOMIC_UNIT_OF_MOMENTUM

ATOMIC_UNIT_OF_PERMITTIVITY

ATOMIC_UNIT_OF_TIME

ATOMIC_UNIT_OF_VELOCITY

AVOGADRO_CONSTANT

BOHR_MAGNETON

BOHR_MAGNETON_IN_EV_T

BOHR_MAGNETON_IN_HZ_T

BOHR_MAGNETON_IN_INVERSE_METER_PER_TESLA

BOHR_MAGNETON_IN_K_T

BOHR_RADIUS

BOLTZMANN_CONSTANT

BOLTZMANN_CONSTANT_IN_EV_K

BOLTZMANN_CONSTANT_IN_HZ_K

BOLTZMANN_CONSTANT_IN_INVERSE_METER_PER_KELVIN

CHARACTERISTIC_IMPEDANCE_OF_VACUUM

CLASSICAL_ELECTRON_RADIUS

COMPTON_WAVELENGTH

CONDUCTANCE_QUANTUM

CONVENTIONAL_VALUE_OF_AMPERE_90

CONVENTIONAL_VALUE_OF_COULOMB_90

CONVENTIONAL_VALUE_OF_FARAD_90

CONVENTIONAL_VALUE_OF_HENRY_90

CONVENTIONAL_VALUE_OF_JOSEPHSON_CONSTANT

CONVENTIONAL_VALUE_OF_OHM_90

CONVENTIONAL_VALUE_OF_VOLT_90

CONVENTIONAL_VALUE_OF_VON_KLITZING_CONSTANT

CONVENTIONAL_VALUE_OF_WATT_90

COPPER_X_UNIT

DEUTERON_ELECTRON_MAG_MOM_RATIO

DEUTERON_ELECTRON_MASS_RATIO

DEUTERON_G_FACTOR

DEUTERON_MAG_MOM

DEUTERON_MAG_MOM_TO_BOHR_MAGNETON_RATIO

DEUTERON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO

DEUTERON_MASS

DEUTERON_MASS_ENERGY_EQUIVALENT

DEUTERON_MASS_ENERGY_EQUIVALENT_IN_MEV

DEUTERON_MASS_IN_U

DEUTERON_MOLAR_MASS

DEUTERON_NEUTRON_MAG_MOM_RATIO

DEUTERON_PROTON_MAG_MOM_RATIO

DEUTERON_PROTON_MASS_RATIO

DEUTERON_RELATIVE_ATOMIC_MASS

DEUTERON_RMS_CHARGE_RADIUS

ELECTRON_CHARGE_TO_MASS_QUOTIENT

ELECTRON_DEUTERON_MAG_MOM_RATIO

ELECTRON_DEUTERON_MASS_RATIO

ELECTRON_G_FACTOR

ELECTRON_GYROMAG_RATIO

ELECTRON_GYROMAG_RATIO_IN_MHZ_T

ELECTRON_HELION_MASS_RATIO

ELECTRON_MAG_MOM

ELECTRON_MAG_MOM_ANOMALY

ELECTRON_MAG_MOM_TO_BOHR_MAGNETON_RATIO

ELECTRON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO

ELECTRON_MASS

ELECTRON_MASS_ENERGY_EQUIVALENT

ELECTRON_MASS_ENERGY_EQUIVALENT_IN_MEV

ELECTRON_MASS_IN_U

ELECTRON_MOLAR_MASS

ELECTRON_MUON_MAG_MOM_RATIO

ELECTRON_MUON_MASS_RATIO

ELECTRON_NEUTRON_MAG_MOM_RATIO

ELECTRON_NEUTRON_MASS_RATIO

ELECTRON_PROTON_MAG_MOM_RATIO

ELECTRON_PROTON_MASS_RATIO

ELECTRON_RELATIVE_ATOMIC_MASS

ELECTRON_TAU_MASS_RATIO

ELECTRON_TO_ALPHA_PARTICLE_MASS_RATIO

ELECTRON_TO_SHIELDED_HELION_MAG_MOM_RATIO

ELECTRON_TO_SHIELDED_PROTON_MAG_MOM_RATIO

ELECTRON_TRITON_MASS_RATIO

ELECTRON_VOLT

ELECTRON_VOLT_ATOMIC_MASS_UNIT_RELATIONSHIP

ELECTRON_VOLT_HARTREE_RELATIONSHIP

ELECTRON_VOLT_HERTZ_RELATIONSHIP

ELECTRON_VOLT_INVERSE_METER_RELATIONSHIP

ELECTRON_VOLT_JOULE_RELATIONSHIP

ELECTRON_VOLT_KELVIN_RELATIONSHIP

ELECTRON_VOLT_KILOGRAM_RELATIONSHIP

ELEMENTARY_CHARGE

ELEMENTARY_CHARGE_OVER_H_BAR

FARADAY_CONSTANT

FERMI_COUPLING_CONSTANT

FINE_STRUCTURE_CONSTANT

FIRST_RADIATION_CONSTANT

FIRST_RADIATION_CONSTANT_FOR_SPECTRAL_RADIANCE

HARTREE_ATOMIC_MASS_UNIT_RELATIONSHIP

HARTREE_ELECTRON_VOLT_RELATIONSHIP

HARTREE_ENERGY

HARTREE_ENERGY_IN_EV

HARTREE_HERTZ_RELATIONSHIP

HARTREE_INVERSE_METER_RELATIONSHIP

HARTREE_JOULE_RELATIONSHIP

HARTREE_KELVIN_RELATIONSHIP

HARTREE_KILOGRAM_RELATIONSHIP

HELION_ELECTRON_MASS_RATIO

HELION_G_FACTOR

HELION_MAG_MOM

HELION_MAG_MOM_TO_BOHR_MAGNETON_RATIO

HELION_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO

HELION_MASS

HELION_MASS_ENERGY_EQUIVALENT

HELION_MASS_ENERGY_EQUIVALENT_IN_MEV

HELION_MASS_IN_U

HELION_MOLAR_MASS

HELION_PROTON_MASS_RATIO

HELION_RELATIVE_ATOMIC_MASS

HELION_SHIELDING_SHIFT

HERTZ_ATOMIC_MASS_UNIT_RELATIONSHIP

HERTZ_ELECTRON_VOLT_RELATIONSHIP

HERTZ_HARTREE_RELATIONSHIP

HERTZ_INVERSE_METER_RELATIONSHIP

HERTZ_JOULE_RELATIONSHIP

HERTZ_KELVIN_RELATIONSHIP

HERTZ_KILOGRAM_RELATIONSHIP

HYPERFINE_TRANSITION_FREQUENCY_OF_CS_133

INVERSE_FINE_STRUCTURE_CONSTANT

INVERSE_METER_ATOMIC_MASS_UNIT_RELATIONSHIP

INVERSE_METER_ELECTRON_VOLT_RELATIONSHIP

INVERSE_METER_HARTREE_RELATIONSHIP

INVERSE_METER_HERTZ_RELATIONSHIP

INVERSE_METER_JOULE_RELATIONSHIP

INVERSE_METER_KELVIN_RELATIONSHIP

INVERSE_METER_KILOGRAM_RELATIONSHIP

INVERSE_OF_CONDUCTANCE_QUANTUM

JOSEPHSON_CONSTANT

JOULE_ATOMIC_MASS_UNIT_RELATIONSHIP

JOULE_ELECTRON_VOLT_RELATIONSHIP

JOULE_HARTREE_RELATIONSHIP

JOULE_HERTZ_RELATIONSHIP

JOULE_INVERSE_METER_RELATIONSHIP

JOULE_KELVIN_RELATIONSHIP

JOULE_KILOGRAM_RELATIONSHIP

KELVIN_ATOMIC_MASS_UNIT_RELATIONSHIP

KELVIN_ELECTRON_VOLT_RELATIONSHIP

KELVIN_HARTREE_RELATIONSHIP

KELVIN_HERTZ_RELATIONSHIP

KELVIN_INVERSE_METER_RELATIONSHIP

KELVIN_JOULE_RELATIONSHIP

KELVIN_KILOGRAM_RELATIONSHIP

KILOGRAM_ATOMIC_MASS_UNIT_RELATIONSHIP

KILOGRAM_ELECTRON_VOLT_RELATIONSHIP

KILOGRAM_HARTREE_RELATIONSHIP

KILOGRAM_HERTZ_RELATIONSHIP

KILOGRAM_INVERSE_METER_RELATIONSHIP

KILOGRAM_JOULE_RELATIONSHIP

KILOGRAM_KELVIN_RELATIONSHIP

LATTICE_PARAMETER_OF_SILICON

LATTICE_SPACING_OF_IDEAL_SI_220

LOSCHMIDT_CONSTANT_273_15_K_100_KPA

LOSCHMIDT_CONSTANT_273_15_K_101_325_KPA

LUMINOUS_EFFICACY

MAG_FLUX_QUANTUM

MOLAR_GAS_CONSTANT

MOLAR_MASS_CONSTANT

MOLAR_MASS_OF_CARBON_12

MOLAR_PLANCK_CONSTANT

MOLAR_VOLUME_OF_IDEAL_GAS_273_15_K_100_KPA

MOLAR_VOLUME_OF_IDEAL_GAS_273_15_K_101_325_KPA

MOLAR_VOLUME_OF_SILICON

MOLYBDENUM_X_UNIT

MUON_COMPTON_WAVELENGTH

MUON_ELECTRON_MASS_RATIO

MUON_G_FACTOR

MUON_MAG_MOM

MUON_MAG_MOM_ANOMALY

MUON_MAG_MOM_TO_BOHR_MAGNETON_RATIO

MUON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO

MUON_MASS

MUON_MASS_ENERGY_EQUIVALENT

MUON_MASS_ENERGY_EQUIVALENT_IN_MEV

MUON_MASS_IN_U

MUON_MOLAR_MASS

MUON_NEUTRON_MASS_RATIO

MUON_PROTON_MAG_MOM_RATIO

MUON_PROTON_MASS_RATIO

MUON_TAU_MASS_RATIO

NATURAL_UNIT_OF_ACTION

NATURAL_UNIT_OF_ACTION_IN_EV_S

NATURAL_UNIT_OF_ENERGY

NATURAL_UNIT_OF_ENERGY_IN_MEV

NATURAL_UNIT_OF_LENGTH

NATURAL_UNIT_OF_MASS

NATURAL_UNIT_OF_MOMENTUM

NATURAL_UNIT_OF_MOMENTUM_IN_MEV_C

NATURAL_UNIT_OF_TIME

NATURAL_UNIT_OF_VELOCITY

NEUTRON_COMPTON_WAVELENGTH

NEUTRON_ELECTRON_MAG_MOM_RATIO

NEUTRON_ELECTRON_MASS_RATIO

NEUTRON_G_FACTOR

NEUTRON_GYROMAG_RATIO

NEUTRON_GYROMAG_RATIO_IN_MHZ_T

NEUTRON_MAG_MOM

NEUTRON_MAG_MOM_TO_BOHR_MAGNETON_RATIO

NEUTRON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO

NEUTRON_MASS

NEUTRON_MASS_ENERGY_EQUIVALENT

NEUTRON_MASS_ENERGY_EQUIVALENT_IN_MEV

NEUTRON_MASS_IN_U

NEUTRON_MOLAR_MASS

NEUTRON_MUON_MASS_RATIO

NEUTRON_PROTON_MAG_MOM_RATIO

NEUTRON_PROTON_MASS_DIFFERENCE

NEUTRON_PROTON_MASS_DIFFERENCE_ENERGY_EQUIVALENT

NEUTRON_PROTON_MASS_DIFFERENCE_ENERGY_EQUIVALENT_IN_MEV

NEUTRON_PROTON_MASS_DIFFERENCE_IN_U

NEUTRON_PROTON_MASS_RATIO

NEUTRON_RELATIVE_ATOMIC_MASS

NEUTRON_TAU_MASS_RATIO

NEUTRON_TO_SHIELDED_PROTON_MAG_MOM_RATIO

NEWTONIAN_CONSTANT_OF_GRAVITATION

NEWTONIAN_CONSTANT_OF_GRAVITATION_OVER_H_BAR_C

NUCLEAR_MAGNETON

NUCLEAR_MAGNETON_IN_EV_T

NUCLEAR_MAGNETON_IN_INVERSE_METER_PER_TESLA

NUCLEAR_MAGNETON_IN_K_T

NUCLEAR_MAGNETON_IN_MHZ_T

PLANCK_CONSTANT

PLANCK_CONSTANT_IN_EV_HZ

PLANCK_LENGTH

PLANCK_MASS

PLANCK_MASS_ENERGY_EQUIVALENT_IN_GEV

PLANCK_TEMPERATURE

PLANCK_TIME

PROTON_CHARGE_TO_MASS_QUOTIENT

PROTON_COMPTON_WAVELENGTH

PROTON_ELECTRON_MASS_RATIO

PROTON_G_FACTOR

PROTON_GYROMAG_RATIO

PROTON_GYROMAG_RATIO_IN_MHZ_T

PROTON_MAG_MOM

PROTON_MAG_MOM_TO_BOHR_MAGNETON_RATIO

PROTON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO

PROTON_MAG_SHIELDING_CORRECTION

PROTON_MASS

PROTON_MASS_ENERGY_EQUIVALENT

PROTON_MASS_ENERGY_EQUIVALENT_IN_MEV

PROTON_MASS_IN_U

PROTON_MOLAR_MASS

PROTON_MUON_MASS_RATIO

PROTON_NEUTRON_MAG_MOM_RATIO

PROTON_NEUTRON_MASS_RATIO

PROTON_RELATIVE_ATOMIC_MASS

PROTON_RMS_CHARGE_RADIUS

PROTON_TAU_MASS_RATIO

QUANTUM_OF_CIRCULATION

QUANTUM_OF_CIRCULATION_TIMES_2

REDUCED_COMPTON_WAVELENGTH

REDUCED_MUON_COMPTON_WAVELENGTH

REDUCED_NEUTRON_COMPTON_WAVELENGTH

REDUCED_PLANCK_CONSTANT

REDUCED_PLANCK_CONSTANT_IN_EV_S

REDUCED_PLANCK_CONSTANT_TIMES_C_IN_MEV_FM

REDUCED_PROTON_COMPTON_WAVELENGTH

REDUCED_TAU_COMPTON_WAVELENGTH

RYDBERG_CONSTANT

RYDBERG_CONSTANT_TIMES_C_IN_HZ

RYDBERG_CONSTANT_TIMES_HC_IN_EV

RYDBERG_CONSTANT_TIMES_HC_IN_J

SACKUR_TETRODE_CONSTANT_1_K_100_KPA

SACKUR_TETRODE_CONSTANT_1_K_101_325_KPA

SECOND_RADIATION_CONSTANT

SHIELDED_HELION_GYROMAG_RATIO

SHIELDED_HELION_GYROMAG_RATIO_IN_MHZ_T

SHIELDED_HELION_MAG_MOM

SHIELDED_HELION_MAG_MOM_TO_BOHR_MAGNETON_RATIO

SHIELDED_HELION_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO

SHIELDED_HELION_TO_PROTON_MAG_MOM_RATIO

SHIELDED_HELION_TO_SHIELDED_PROTON_MAG_MOM_RATIO

SHIELDED_PROTON_GYROMAG_RATIO

SHIELDED_PROTON_GYROMAG_RATIO_IN_MHZ_T

SHIELDED_PROTON_MAG_MOM

SHIELDED_PROTON_MAG_MOM_TO_BOHR_MAGNETON_RATIO

SHIELDED_PROTON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO

SHIELDING_DIFFERENCE_OF_D_AND_P_IN_HD

SHIELDING_DIFFERENCE_OF_T_AND_P_IN_HT

SPEED_OF_LIGHT_IN_VACUUM

STANDARD_ACCELERATION_OF_GRAVITY

STANDARD_ATMOSPHERE

STANDARD_STATE_PRESSURE

STEFAN_BOLTZMANN_CONSTANT

TAU_COMPTON_WAVELENGTH

TAU_ELECTRON_MASS_RATIO

TAU_ENERGY_EQUIVALENT

TAU_MASS

TAU_MASS_ENERGY_EQUIVALENT

TAU_MASS_IN_U

TAU_MOLAR_MASS

TAU_MUON_MASS_RATIO

TAU_NEUTRON_MASS_RATIO

TAU_PROTON_MASS_RATIO

THOMSON_CROSS_SECTION

TRITON_ELECTRON_MASS_RATIO

TRITON_G_FACTOR

TRITON_MAG_MOM

TRITON_MAG_MOM_TO_BOHR_MAGNETON_RATIO

TRITON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO

TRITON_MASS

TRITON_MASS_ENERGY_EQUIVALENT

TRITON_MASS_ENERGY_EQUIVALENT_IN_MEV

TRITON_MASS_IN_U

TRITON_MOLAR_MASS

TRITON_PROTON_MASS_RATIO

TRITON_RELATIVE_ATOMIC_MASS

TRITON_TO_PROTON_MAG_MOM_RATIO

UNIFIED_ATOMIC_MASS_UNIT

VACUUM_ELECTRIC_PERMITTIVITY

VACUUM_MAG_PERMEABILITY

VON_KLITZING_CONSTANT

WEAK_MIXING_ANGLE

WIEN_FREQUENCY_DISPLACEMENT_LAW_CONSTANT

WIEN_WAVELENGTH_DISPLACEMENT_LAW_CONSTANT

W_TO_Z_MASS_RATIO

CODATA 2018

List of available constants:

ALPHA_PARTICLE_ELECTRON_MASS_RATIO _2018

ALPHA_PARTICLE_MASS _2018

ALPHA_PARTICLE_MASS_ENERGY_EQUIVALENT _2018

ALPHA_PARTICLE_MASS_ENERGY_EQUIVALENT_IN_MEV _2018

ALPHA_PARTICLE_MASS_IN_U _2018

ALPHA_PARTICLE_MOLAR_MASS _2018

ALPHA_PARTICLE_PROTON_MASS_RATIO _2018

ALPHA_PARTICLE_RELATIVE_ATOMIC_MASS _2018

ANGSTROM_STAR _2018

ATOMIC_MASS_CONSTANT _2018

ATOMIC_MASS_CONSTANT_ENERGY_EQUIVALENT _2018

ATOMIC_MASS_CONSTANT_ENERGY_EQUIVALENT_IN_MEV _2018

ATOMIC_MASS_UNIT_ELECTRON_VOLT_RELATIONSHIP _2018

ATOMIC_MASS_UNIT_HARTREE_RELATIONSHIP _2018

ATOMIC_MASS_UNIT_HERTZ_RELATIONSHIP _2018

ATOMIC_MASS_UNIT_INVERSE_METER_RELATIONSHIP _2018

ATOMIC_MASS_UNIT_JOULE_RELATIONSHIP _2018

ATOMIC_MASS_UNIT_KELVIN_RELATIONSHIP _2018

ATOMIC_MASS_UNIT_KILOGRAM_RELATIONSHIP _2018

ATOMIC_UNIT_OF_1ST_HYPERPOLARIZABILITY _2018

ATOMIC_UNIT_OF_2ND_HYPERPOLARIZABILITY _2018

ATOMIC_UNIT_OF_ACTION _2018

ATOMIC_UNIT_OF_CHARGE _2018

ATOMIC_UNIT_OF_CHARGE_DENSITY _2018

ATOMIC_UNIT_OF_CURRENT _2018

ATOMIC_UNIT_OF_ELECTRIC_DIPOLE_MOM _2018

ATOMIC_UNIT_OF_ELECTRIC_FIELD _2018

ATOMIC_UNIT_OF_ELECTRIC_FIELD_GRADIENT _2018

ATOMIC_UNIT_OF_ELECTRIC_POLARIZABILITY _2018

ATOMIC_UNIT_OF_ELECTRIC_POTENTIAL _2018

ATOMIC_UNIT_OF_ELECTRIC_QUADRUPOLE_MOM _2018

ATOMIC_UNIT_OF_ENERGY _2018

ATOMIC_UNIT_OF_FORCE _2018

ATOMIC_UNIT_OF_LENGTH _2018

ATOMIC_UNIT_OF_MAG_DIPOLE_MOM _2018

ATOMIC_UNIT_OF_MAG_FLUX_DENSITY _2018

ATOMIC_UNIT_OF_MAGNETIZABILITY _2018

ATOMIC_UNIT_OF_MASS _2018

ATOMIC_UNIT_OF_MOMENTUM _2018

ATOMIC_UNIT_OF_PERMITTIVITY _2018

ATOMIC_UNIT_OF_TIME _2018

ATOMIC_UNIT_OF_VELOCITY _2018

AVOGADRO_CONSTANT _2018

BOHR_MAGNETON _2018

BOHR_MAGNETON_IN_EV_T _2018

BOHR_MAGNETON_IN_HZ_T _2018

BOHR_MAGNETON_IN_INVERSE_METER_PER_TESLA _2018

BOHR_MAGNETON_IN_K_T _2018

BOHR_RADIUS _2018

BOLTZMANN_CONSTANT _2018

BOLTZMANN_CONSTANT_IN_EV_K _2018

BOLTZMANN_CONSTANT_IN_HZ_K _2018

BOLTZMANN_CONSTANT_IN_INVERSE_METER_PER_KELVIN _2018

CHARACTERISTIC_IMPEDANCE_OF_VACUUM _2018

CLASSICAL_ELECTRON_RADIUS _2018

COMPTON_WAVELENGTH _2018

CONDUCTANCE_QUANTUM _2018

CONVENTIONAL_VALUE_OF_AMPERE_90 _2018

CONVENTIONAL_VALUE_OF_COULOMB_90 _2018

CONVENTIONAL_VALUE_OF_FARAD_90 _2018

CONVENTIONAL_VALUE_OF_HENRY_90 _2018

CONVENTIONAL_VALUE_OF_JOSEPHSON_CONSTANT _2018

CONVENTIONAL_VALUE_OF_OHM_90 _2018

CONVENTIONAL_VALUE_OF_VOLT_90 _2018

CONVENTIONAL_VALUE_OF_VON_KLITZING_CONSTANT _2018

CONVENTIONAL_VALUE_OF_WATT_90 _2018

COPPER_X_UNIT _2018

DEUTERON_ELECTRON_MAG_MOM_RATIO _2018

DEUTERON_ELECTRON_MASS_RATIO _2018

DEUTERON_G_FACTOR _2018

DEUTERON_MAG_MOM _2018

DEUTERON_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2018

DEUTERON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2018

DEUTERON_MASS _2018

DEUTERON_MASS_ENERGY_EQUIVALENT _2018

DEUTERON_MASS_ENERGY_EQUIVALENT_IN_MEV _2018

DEUTERON_MASS_IN_U _2018

DEUTERON_MOLAR_MASS _2018

DEUTERON_NEUTRON_MAG_MOM_RATIO _2018

DEUTERON_PROTON_MAG_MOM_RATIO _2018

DEUTERON_PROTON_MASS_RATIO _2018

DEUTERON_RELATIVE_ATOMIC_MASS _2018

DEUTERON_RMS_CHARGE_RADIUS _2018

ELECTRON_CHARGE_TO_MASS_QUOTIENT _2018

ELECTRON_DEUTERON_MAG_MOM_RATIO _2018

ELECTRON_DEUTERON_MASS_RATIO _2018

ELECTRON_G_FACTOR _2018

ELECTRON_GYROMAG_RATIO _2018

ELECTRON_GYROMAG_RATIO_IN_MHZ_T _2018

ELECTRON_HELION_MASS_RATIO _2018

ELECTRON_MAG_MOM _2018

ELECTRON_MAG_MOM_ANOMALY _2018

ELECTRON_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2018

ELECTRON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2018

ELECTRON_MASS _2018

ELECTRON_MASS_ENERGY_EQUIVALENT _2018

ELECTRON_MASS_ENERGY_EQUIVALENT_IN_MEV _2018

ELECTRON_MASS_IN_U _2018

ELECTRON_MOLAR_MASS _2018

ELECTRON_MUON_MAG_MOM_RATIO _2018

ELECTRON_MUON_MASS_RATIO _2018

ELECTRON_NEUTRON_MAG_MOM_RATIO _2018

ELECTRON_NEUTRON_MASS_RATIO _2018

ELECTRON_PROTON_MAG_MOM_RATIO _2018

ELECTRON_PROTON_MASS_RATIO _2018

ELECTRON_RELATIVE_ATOMIC_MASS _2018

ELECTRON_TAU_MASS_RATIO _2018

ELECTRON_TO_ALPHA_PARTICLE_MASS_RATIO _2018

ELECTRON_TO_SHIELDED_HELION_MAG_MOM_RATIO _2018

ELECTRON_TO_SHIELDED_PROTON_MAG_MOM_RATIO _2018

ELECTRON_TRITON_MASS_RATIO _2018

ELECTRON_VOLT _2018

ELECTRON_VOLT_ATOMIC_MASS_UNIT_RELATIONSHIP _2018

ELECTRON_VOLT_HARTREE_RELATIONSHIP _2018

ELECTRON_VOLT_HERTZ_RELATIONSHIP _2018

ELECTRON_VOLT_INVERSE_METER_RELATIONSHIP _2018

ELECTRON_VOLT_JOULE_RELATIONSHIP _2018

ELECTRON_VOLT_KELVIN_RELATIONSHIP _2018

ELECTRON_VOLT_KILOGRAM_RELATIONSHIP _2018

ELEMENTARY_CHARGE _2018

ELEMENTARY_CHARGE_OVER_H_BAR _2018

FARADAY_CONSTANT _2018

FERMI_COUPLING_CONSTANT _2018

FINE_STRUCTURE_CONSTANT _2018

FIRST_RADIATION_CONSTANT _2018

FIRST_RADIATION_CONSTANT_FOR_SPECTRAL_RADIANCE _2018

HARTREE_ATOMIC_MASS_UNIT_RELATIONSHIP _2018

HARTREE_ELECTRON_VOLT_RELATIONSHIP _2018

HARTREE_ENERGY _2018

HARTREE_ENERGY_IN_EV _2018

HARTREE_HERTZ_RELATIONSHIP _2018

HARTREE_INVERSE_METER_RELATIONSHIP _2018

HARTREE_JOULE_RELATIONSHIP _2018

HARTREE_KELVIN_RELATIONSHIP _2018

HARTREE_KILOGRAM_RELATIONSHIP _2018

HELION_ELECTRON_MASS_RATIO _2018

HELION_G_FACTOR _2018

HELION_MAG_MOM _2018

HELION_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2018

HELION_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2018

HELION_MASS _2018

HELION_MASS_ENERGY_EQUIVALENT _2018

HELION_MASS_ENERGY_EQUIVALENT_IN_MEV _2018

HELION_MASS_IN_U _2018

HELION_MOLAR_MASS _2018

HELION_PROTON_MASS_RATIO _2018

HELION_RELATIVE_ATOMIC_MASS _2018

HELION_SHIELDING_SHIFT _2018

HERTZ_ATOMIC_MASS_UNIT_RELATIONSHIP _2018

HERTZ_ELECTRON_VOLT_RELATIONSHIP _2018

HERTZ_HARTREE_RELATIONSHIP _2018

HERTZ_INVERSE_METER_RELATIONSHIP _2018

HERTZ_JOULE_RELATIONSHIP _2018

HERTZ_KELVIN_RELATIONSHIP _2018

HERTZ_KILOGRAM_RELATIONSHIP _2018

HYPERFINE_TRANSITION_FREQUENCY_OF_CS_133 _2018

INVERSE_FINE_STRUCTURE_CONSTANT _2018

INVERSE_METER_ATOMIC_MASS_UNIT_RELATIONSHIP _2018

INVERSE_METER_ELECTRON_VOLT_RELATIONSHIP _2018

INVERSE_METER_HARTREE_RELATIONSHIP _2018

INVERSE_METER_HERTZ_RELATIONSHIP _2018

INVERSE_METER_JOULE_RELATIONSHIP _2018

INVERSE_METER_KELVIN_RELATIONSHIP _2018

INVERSE_METER_KILOGRAM_RELATIONSHIP _2018

INVERSE_OF_CONDUCTANCE_QUANTUM _2018

JOSEPHSON_CONSTANT _2018

JOULE_ATOMIC_MASS_UNIT_RELATIONSHIP _2018

JOULE_ELECTRON_VOLT_RELATIONSHIP _2018

JOULE_HARTREE_RELATIONSHIP _2018

JOULE_HERTZ_RELATIONSHIP _2018

JOULE_INVERSE_METER_RELATIONSHIP _2018

JOULE_KELVIN_RELATIONSHIP _2018

JOULE_KILOGRAM_RELATIONSHIP _2018

KELVIN_ATOMIC_MASS_UNIT_RELATIONSHIP _2018

KELVIN_ELECTRON_VOLT_RELATIONSHIP _2018

KELVIN_HARTREE_RELATIONSHIP _2018

KELVIN_HERTZ_RELATIONSHIP _2018

KELVIN_INVERSE_METER_RELATIONSHIP _2018

KELVIN_JOULE_RELATIONSHIP _2018

KELVIN_KILOGRAM_RELATIONSHIP _2018

KILOGRAM_ATOMIC_MASS_UNIT_RELATIONSHIP _2018

KILOGRAM_ELECTRON_VOLT_RELATIONSHIP _2018

KILOGRAM_HARTREE_RELATIONSHIP _2018

KILOGRAM_HERTZ_RELATIONSHIP _2018

KILOGRAM_INVERSE_METER_RELATIONSHIP _2018

KILOGRAM_JOULE_RELATIONSHIP _2018

KILOGRAM_KELVIN_RELATIONSHIP _2018

LATTICE_PARAMETER_OF_SILICON _2018

LATTICE_SPACING_OF_IDEAL_SI_220 _2018

LOSCHMIDT_CONSTANT_273_15_K_100_KPA _2018

LOSCHMIDT_CONSTANT_273_15_K_101_325_KPA _2018

LUMINOUS_EFFICACY _2018

MAG_FLUX_QUANTUM _2018

MOLAR_GAS_CONSTANT _2018

MOLAR_MASS_CONSTANT _2018

MOLAR_MASS_OF_CARBON_12 _2018

MOLAR_PLANCK_CONSTANT _2018

MOLAR_VOLUME_OF_IDEAL_GAS_273_15_K_100_KPA _2018

MOLAR_VOLUME_OF_IDEAL_GAS_273_15_K_101_325_KPA _2018

MOLAR_VOLUME_OF_SILICON _2018

MOLYBDENUM_X_UNIT _2018

MUON_COMPTON_WAVELENGTH _2018

MUON_ELECTRON_MASS_RATIO _2018

MUON_G_FACTOR _2018

MUON_MAG_MOM _2018

MUON_MAG_MOM_ANOMALY _2018

MUON_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2018

MUON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2018

MUON_MASS _2018

MUON_MASS_ENERGY_EQUIVALENT _2018

MUON_MASS_ENERGY_EQUIVALENT_IN_MEV _2018

MUON_MASS_IN_U _2018

MUON_MOLAR_MASS _2018

MUON_NEUTRON_MASS_RATIO _2018

MUON_PROTON_MAG_MOM_RATIO _2018

MUON_PROTON_MASS_RATIO _2018

MUON_TAU_MASS_RATIO _2018

NATURAL_UNIT_OF_ACTION _2018

NATURAL_UNIT_OF_ACTION_IN_EV_S _2018

NATURAL_UNIT_OF_ENERGY _2018

NATURAL_UNIT_OF_ENERGY_IN_MEV _2018

NATURAL_UNIT_OF_LENGTH _2018

NATURAL_UNIT_OF_MASS _2018

NATURAL_UNIT_OF_MOMENTUM _2018

NATURAL_UNIT_OF_MOMENTUM_IN_MEV_C _2018

NATURAL_UNIT_OF_TIME _2018

NATURAL_UNIT_OF_VELOCITY _2018

NEUTRON_COMPTON_WAVELENGTH _2018

NEUTRON_ELECTRON_MAG_MOM_RATIO _2018

NEUTRON_ELECTRON_MASS_RATIO _2018

NEUTRON_G_FACTOR _2018

NEUTRON_GYROMAG_RATIO _2018

NEUTRON_GYROMAG_RATIO_IN_MHZ_T _2018

NEUTRON_MAG_MOM _2018

NEUTRON_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2018

NEUTRON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2018

NEUTRON_MASS _2018

NEUTRON_MASS_ENERGY_EQUIVALENT _2018

NEUTRON_MASS_ENERGY_EQUIVALENT_IN_MEV _2018

NEUTRON_MASS_IN_U _2018

NEUTRON_MOLAR_MASS _2018

NEUTRON_MUON_MASS_RATIO _2018

NEUTRON_PROTON_MAG_MOM_RATIO _2018

NEUTRON_PROTON_MASS_DIFFERENCE _2018

NEUTRON_PROTON_MASS_DIFFERENCE_ENERGY_EQUIVALENT _2018

NEUTRON_PROTON_MASS_DIFFERENCE_ENERGY_EQUIVALENT_IN_MEV _2018

NEUTRON_PROTON_MASS_DIFFERENCE_IN_U _2018

NEUTRON_PROTON_MASS_RATIO _2018

NEUTRON_RELATIVE_ATOMIC_MASS _2018

NEUTRON_TAU_MASS_RATIO _2018

NEUTRON_TO_SHIELDED_PROTON_MAG_MOM_RATIO _2018

NEWTONIAN_CONSTANT_OF_GRAVITATION _2018

NEWTONIAN_CONSTANT_OF_GRAVITATION_OVER_H_BAR_C _2018

NUCLEAR_MAGNETON _2018

NUCLEAR_MAGNETON_IN_EV_T _2018

NUCLEAR_MAGNETON_IN_INVERSE_METER_PER_TESLA _2018

NUCLEAR_MAGNETON_IN_K_T _2018

NUCLEAR_MAGNETON_IN_MHZ_T _2018

PLANCK_CONSTANT _2018

PLANCK_CONSTANT_IN_EV_HZ _2018

PLANCK_LENGTH _2018

PLANCK_MASS _2018

PLANCK_MASS_ENERGY_EQUIVALENT_IN_GEV _2018

PLANCK_TEMPERATURE _2018

PLANCK_TIME _2018

PROTON_CHARGE_TO_MASS_QUOTIENT _2018

PROTON_COMPTON_WAVELENGTH _2018

PROTON_ELECTRON_MASS_RATIO _2018

PROTON_G_FACTOR _2018

PROTON_GYROMAG_RATIO _2018

PROTON_GYROMAG_RATIO_IN_MHZ_T _2018

PROTON_MAG_MOM _2018

PROTON_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2018

PROTON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2018

PROTON_MAG_SHIELDING_CORRECTION _2018

PROTON_MASS _2018

PROTON_MASS_ENERGY_EQUIVALENT _2018

PROTON_MASS_ENERGY_EQUIVALENT_IN_MEV _2018

PROTON_MASS_IN_U _2018

PROTON_MOLAR_MASS _2018

PROTON_MUON_MASS_RATIO _2018

PROTON_NEUTRON_MAG_MOM_RATIO _2018

PROTON_NEUTRON_MASS_RATIO _2018

PROTON_RELATIVE_ATOMIC_MASS _2018

PROTON_RMS_CHARGE_RADIUS _2018

PROTON_TAU_MASS_RATIO _2018

QUANTUM_OF_CIRCULATION _2018

QUANTUM_OF_CIRCULATION_TIMES_2 _2018

REDUCED_COMPTON_WAVELENGTH _2018

REDUCED_MUON_COMPTON_WAVELENGTH _2018

REDUCED_NEUTRON_COMPTON_WAVELENGTH _2018

REDUCED_PLANCK_CONSTANT _2018

REDUCED_PLANCK_CONSTANT_IN_EV_S _2018

REDUCED_PLANCK_CONSTANT_TIMES_C_IN_MEV_FM _2018

REDUCED_PROTON_COMPTON_WAVELENGTH _2018

REDUCED_TAU_COMPTON_WAVELENGTH _2018

RYDBERG_CONSTANT _2018

RYDBERG_CONSTANT_TIMES_C_IN_HZ _2018

RYDBERG_CONSTANT_TIMES_HC_IN_EV _2018

RYDBERG_CONSTANT_TIMES_HC_IN_J _2018

SACKUR_TETRODE_CONSTANT_1_K_100_KPA _2018

SACKUR_TETRODE_CONSTANT_1_K_101_325_KPA _2018

SECOND_RADIATION_CONSTANT _2018

SHIELDED_HELION_GYROMAG_RATIO _2018

SHIELDED_HELION_GYROMAG_RATIO_IN_MHZ_T _2018

SHIELDED_HELION_MAG_MOM _2018

SHIELDED_HELION_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2018

SHIELDED_HELION_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2018

SHIELDED_HELION_TO_PROTON_MAG_MOM_RATIO _2018

SHIELDED_HELION_TO_SHIELDED_PROTON_MAG_MOM_RATIO _2018

SHIELDED_PROTON_GYROMAG_RATIO _2018

SHIELDED_PROTON_GYROMAG_RATIO_IN_MHZ_T _2018

SHIELDED_PROTON_MAG_MOM _2018

SHIELDED_PROTON_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2018

SHIELDED_PROTON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2018

SHIELDING_DIFFERENCE_OF_D_AND_P_IN_HD _2018

SHIELDING_DIFFERENCE_OF_T_AND_P_IN_HT _2018

SPEED_OF_LIGHT_IN_VACUUM _2018

STANDARD_ACCELERATION_OF_GRAVITY _2018

STANDARD_ATMOSPHERE _2018

STANDARD_STATE_PRESSURE _2018

STEFAN_BOLTZMANN_CONSTANT _2018

TAU_COMPTON_WAVELENGTH _2018

TAU_ELECTRON_MASS_RATIO _2018

TAU_ENERGY_EQUIVALENT _2018

TAU_MASS _2018

TAU_MASS_ENERGY_EQUIVALENT _2018

TAU_MASS_IN_U _2018

TAU_MOLAR_MASS _2018

TAU_MUON_MASS_RATIO _2018

TAU_NEUTRON_MASS_RATIO _2018

TAU_PROTON_MASS_RATIO _2018

THOMSON_CROSS_SECTION _2018

TRITON_ELECTRON_MASS_RATIO _2018

TRITON_G_FACTOR _2018

TRITON_MAG_MOM _2018

TRITON_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2018

TRITON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2018

TRITON_MASS _2018

TRITON_MASS_ENERGY_EQUIVALENT _2018

TRITON_MASS_ENERGY_EQUIVALENT_IN_MEV _2018

TRITON_MASS_IN_U _2018

TRITON_MOLAR_MASS _2018

TRITON_PROTON_MASS_RATIO _2018

TRITON_RELATIVE_ATOMIC_MASS _2018

TRITON_TO_PROTON_MAG_MOM_RATIO _2018

UNIFIED_ATOMIC_MASS_UNIT _2018

VACUUM_ELECTRIC_PERMITTIVITY _2018

VACUUM_MAG_PERMEABILITY _2018

VON_KLITZING_CONSTANT _2018

WEAK_MIXING_ANGLE _2018

WIEN_FREQUENCY_DISPLACEMENT_LAW_CONSTANT _2018

WIEN_WAVELENGTH_DISPLACEMENT_LAW_CONSTANT _2018

W_TO_Z_MASS_RATIO _2018

CODATA 2014

List of available constants:

LATTICE_SPACING_OF_SILICON _2014

ALPHA_PARTICLE_ELECTRON_MASS_RATIO _2014

ALPHA_PARTICLE_MASS _2014

ALPHA_PARTICLE_MASS_ENERGY_EQUIVALENT _2014

ALPHA_PARTICLE_MASS_ENERGY_EQUIVALENT_IN_MEV _2014

ALPHA_PARTICLE_MASS_IN_U _2014

ALPHA_PARTICLE_MOLAR_MASS _2014

ALPHA_PARTICLE_PROTON_MASS_RATIO _2014

ANGSTROM_STAR _2014

ATOMIC_MASS_CONSTANT _2014

ATOMIC_MASS_CONSTANT_ENERGY_EQUIVALENT _2014

ATOMIC_MASS_CONSTANT_ENERGY_EQUIVALENT_IN_MEV _2014

ATOMIC_MASS_UNIT_ELECTRON_VOLT_RELATIONSHIP _2014

ATOMIC_MASS_UNIT_HARTREE_RELATIONSHIP _2014

ATOMIC_MASS_UNIT_HERTZ_RELATIONSHIP _2014

ATOMIC_MASS_UNIT_INVERSE_METER_RELATIONSHIP _2014

ATOMIC_MASS_UNIT_JOULE_RELATIONSHIP _2014

ATOMIC_MASS_UNIT_KELVIN_RELATIONSHIP _2014

ATOMIC_MASS_UNIT_KILOGRAM_RELATIONSHIP _2014

ATOMIC_UNIT_OF_1ST_HYPERPOLARIZABILITY _2014

ATOMIC_UNIT_OF_2ND_HYPERPOLARIZABILITY _2014

ATOMIC_UNIT_OF_ACTION _2014

ATOMIC_UNIT_OF_CHARGE _2014

ATOMIC_UNIT_OF_CHARGE_DENSITY _2014

ATOMIC_UNIT_OF_CURRENT _2014

ATOMIC_UNIT_OF_ELECTRIC_DIPOLE_MOM _2014

ATOMIC_UNIT_OF_ELECTRIC_FIELD _2014

ATOMIC_UNIT_OF_ELECTRIC_FIELD_GRADIENT _2014

ATOMIC_UNIT_OF_ELECTRIC_POLARIZABILITY _2014

ATOMIC_UNIT_OF_ELECTRIC_POTENTIAL _2014

ATOMIC_UNIT_OF_ELECTRIC_QUADRUPOLE_MOM _2014

ATOMIC_UNIT_OF_ENERGY _2014

ATOMIC_UNIT_OF_FORCE _2014

ATOMIC_UNIT_OF_LENGTH _2014

ATOMIC_UNIT_OF_MAG_DIPOLE_MOM _2014

ATOMIC_UNIT_OF_MAG_FLUX_DENSITY _2014

ATOMIC_UNIT_OF_MAGNETIZABILITY _2014

ATOMIC_UNIT_OF_MASS _2014

ATOMIC_UNIT_OF_MOMUM _2014

ATOMIC_UNIT_OF_PERMITTIVITY _2014

ATOMIC_UNIT_OF_TIME _2014

ATOMIC_UNIT_OF_VELOCITY _2014

AVOGADRO_CONSTANT _2014

BOHR_MAGNETON _2014

BOHR_MAGNETON_IN_EV_T _2014

BOHR_MAGNETON_IN_HZ_T _2014

BOHR_MAGNETON_IN_INVERSE_METERS_PER_TESLA _2014

BOHR_MAGNETON_IN_K_T _2014

BOHR_RADIUS _2014

BOLTZMANN_CONSTANT _2014

BOLTZMANN_CONSTANT_IN_EV_K _2014

BOLTZMANN_CONSTANT_IN_HZ_K _2014

BOLTZMANN_CONSTANT_IN_INVERSE_METERS_PER_KELVIN _2014

CHARACTERISTIC_IMPEDANCE_OF_VACUUM _2014

CLASSICAL_ELECTRON_RADIUS _2014

COMPTON_WAVELENGTH _2014

COMPTON_WAVELENGTH_OVER_2_PI _2014

CONDUCTANCE_QUANTUM _2014

CONVENTIONAL_VALUE_OF_JOSEPHSON_CONSTANT _2014

CONVENTIONAL_VALUE_OF_VON_KLITZING_CONSTANT _2014

CU_X_UNIT _2014

DEUTERON_ELECTRON_MAG_MOM_RATIO _2014

DEUTERON_ELECTRON_MASS_RATIO _2014

DEUTERON_G_FACTOR _2014

DEUTERON_MAG_MOM _2014

DEUTERON_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2014

DEUTERON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2014

DEUTERON_MASS _2014

DEUTERON_MASS_ENERGY_EQUIVALENT _2014

DEUTERON_MASS_ENERGY_EQUIVALENT_IN_MEV _2014

DEUTERON_MASS_IN_U _2014

DEUTERON_MOLAR_MASS _2014

DEUTERON_NEUTRON_MAG_MOM_RATIO _2014

DEUTERON_PROTON_MAG_MOM_RATIO _2014

DEUTERON_PROTON_MASS_RATIO _2014

DEUTERON_RMS_CHARGE_RADIUS _2014

ELECTRIC_CONSTANT _2014

ELECTRON_CHARGE_TO_MASS_QUOTIENT _2014

ELECTRON_DEUTERON_MAG_MOM_RATIO _2014

ELECTRON_DEUTERON_MASS_RATIO _2014

ELECTRON_G_FACTOR _2014

ELECTRON_GYROMAG_RATIO _2014

ELECTRON_GYROMAG_RATIO_OVER_2_PI _2014

ELECTRON_HELION_MASS_RATIO _2014

ELECTRON_MAG_MOM _2014

ELECTRON_MAG_MOM_ANOMALY _2014

ELECTRON_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2014

ELECTRON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2014

ELECTRON_MASS _2014

ELECTRON_MASS_ENERGY_EQUIVALENT _2014

ELECTRON_MASS_ENERGY_EQUIVALENT_IN_MEV _2014

ELECTRON_MASS_IN_U _2014

ELECTRON_MOLAR_MASS _2014

ELECTRON_MUON_MAG_MOM_RATIO _2014

ELECTRON_MUON_MASS_RATIO _2014

ELECTRON_NEUTRON_MAG_MOM_RATIO _2014

ELECTRON_NEUTRON_MASS_RATIO _2014

ELECTRON_PROTON_MAG_MOM_RATIO _2014

ELECTRON_PROTON_MASS_RATIO _2014

ELECTRON_TAU_MASS_RATIO _2014

ELECTRON_TO_ALPHA_PARTICLE_MASS_RATIO _2014

ELECTRON_TO_SHIELDED_HELION_MAG_MOM_RATIO _2014

ELECTRON_TO_SHIELDED_PROTON_MAG_MOM_RATIO _2014

ELECTRON_TRITON_MASS_RATIO _2014

ELECTRON_VOLT _2014

ELECTRON_VOLT_ATOMIC_MASS_UNIT_RELATIONSHIP _2014

ELECTRON_VOLT_HARTREE_RELATIONSHIP _2014

ELECTRON_VOLT_HERTZ_RELATIONSHIP _2014

ELECTRON_VOLT_INVERSE_METER_RELATIONSHIP _2014

ELECTRON_VOLT_JOULE_RELATIONSHIP _2014

ELECTRON_VOLT_KELVIN_RELATIONSHIP _2014

ELECTRON_VOLT_KILOGRAM_RELATIONSHIP _2014

ELEMENTARY_CHARGE _2014

ELEMENTARY_CHARGE_OVER_H _2014

FARADAY_CONSTANT _2014

FARADAY_CONSTANT_FOR_CONVENTIONAL_ELECTRIC_CURRENT _2014

FERMI_COUPLING_CONSTANT _2014

FINE_STRUCTURE_CONSTANT _2014

FIRST_RADIATION_CONSTANT _2014

FIRST_RADIATION_CONSTANT_FOR_SPECTRAL_RADIANCE _2014

HARTREE_ATOMIC_MASS_UNIT_RELATIONSHIP _2014

HARTREE_ELECTRON_VOLT_RELATIONSHIP _2014

HARTREE_ENERGY _2014

HARTREE_ENERGY_IN_EV _2014

HARTREE_HERTZ_RELATIONSHIP _2014

HARTREE_INVERSE_METER_RELATIONSHIP _2014

HARTREE_JOULE_RELATIONSHIP _2014

HARTREE_KELVIN_RELATIONSHIP _2014

HARTREE_KILOGRAM_RELATIONSHIP _2014

HELION_ELECTRON_MASS_RATIO _2014

HELION_G_FACTOR _2014

HELION_MAG_MOM _2014

HELION_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2014

HELION_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2014

HELION_MASS _2014

HELION_MASS_ENERGY_EQUIVALENT _2014

HELION_MASS_ENERGY_EQUIVALENT_IN_MEV _2014

HELION_MASS_IN_U _2014

HELION_MOLAR_MASS _2014

HELION_PROTON_MASS_RATIO _2014

HERTZ_ATOMIC_MASS_UNIT_RELATIONSHIP _2014

HERTZ_ELECTRON_VOLT_RELATIONSHIP _2014

HERTZ_HARTREE_RELATIONSHIP _2014

HERTZ_INVERSE_METER_RELATIONSHIP _2014

HERTZ_JOULE_RELATIONSHIP _2014

HERTZ_KELVIN_RELATIONSHIP _2014

HERTZ_KILOGRAM_RELATIONSHIP _2014

INVERSE_FINE_STRUCTURE_CONSTANT _2014

INVERSE_METER_ATOMIC_MASS_UNIT_RELATIONSHIP _2014

INVERSE_METER_ELECTRON_VOLT_RELATIONSHIP _2014

INVERSE_METER_HARTREE_RELATIONSHIP _2014

INVERSE_METER_HERTZ_RELATIONSHIP _2014

INVERSE_METER_JOULE_RELATIONSHIP _2014

INVERSE_METER_KELVIN_RELATIONSHIP _2014

INVERSE_METER_KILOGRAM_RELATIONSHIP _2014

INVERSE_OF_CONDUCTANCE_QUANTUM _2014

JOSEPHSON_CONSTANT _2014

JOULE_ATOMIC_MASS_UNIT_RELATIONSHIP _2014

JOULE_ELECTRON_VOLT_RELATIONSHIP _2014

JOULE_HARTREE_RELATIONSHIP _2014

JOULE_HERTZ_RELATIONSHIP _2014

JOULE_INVERSE_METER_RELATIONSHIP _2014

JOULE_KELVIN_RELATIONSHIP _2014

JOULE_KILOGRAM_RELATIONSHIP _2014

KELVIN_ATOMIC_MASS_UNIT_RELATIONSHIP _2014

KELVIN_ELECTRON_VOLT_RELATIONSHIP _2014

KELVIN_HARTREE_RELATIONSHIP _2014

KELVIN_HERTZ_RELATIONSHIP _2014

KELVIN_INVERSE_METER_RELATIONSHIP _2014

KELVIN_JOULE_RELATIONSHIP _2014

KELVIN_KILOGRAM_RELATIONSHIP _2014

KILOGRAM_ATOMIC_MASS_UNIT_RELATIONSHIP _2014

KILOGRAM_ELECTRON_VOLT_RELATIONSHIP _2014

KILOGRAM_HARTREE_RELATIONSHIP _2014

KILOGRAM_HERTZ_RELATIONSHIP _2014

KILOGRAM_INVERSE_METER_RELATIONSHIP _2014

KILOGRAM_JOULE_RELATIONSHIP _2014

KILOGRAM_KELVIN_RELATIONSHIP _2014

LATTICE_PARAMETER_OF_SILICON _2014

LOSCHMIDT_CONSTANT_273_15_K_100_KPA _2014

LOSCHMIDT_CONSTANT_273_15_K_101_325_KPA _2014

MAG_CONSTANT _2014

MAG_FLUX_QUANTUM _2014

MOLAR_GAS_CONSTANT _2014

MOLAR_MASS_CONSTANT _2014

MOLAR_MASS_OF_CARBON_12 _2014

MOLAR_PLANCK_CONSTANT _2014

MOLAR_PLANCK_CONSTANT_TIMES_C _2014

MOLAR_VOLUME_OF_IDEAL_GAS_273_15_K_100_KPA _2014

MOLAR_VOLUME_OF_IDEAL_GAS_273_15_K_101_325_KPA _2014

MOLAR_VOLUME_OF_SILICON _2014

MO_X_UNIT _2014

MUON_COMPTON_WAVELENGTH _2014

MUON_COMPTON_WAVELENGTH_OVER_2_PI _2014

MUON_ELECTRON_MASS_RATIO _2014

MUON_G_FACTOR _2014

MUON_MAG_MOM _2014

MUON_MAG_MOM_ANOMALY _2014

MUON_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2014

MUON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2014

MUON_MASS _2014

MUON_MASS_ENERGY_EQUIVALENT _2014

MUON_MASS_ENERGY_EQUIVALENT_IN_MEV _2014

MUON_MASS_IN_U _2014

MUON_MOLAR_MASS _2014

MUON_NEUTRON_MASS_RATIO _2014

MUON_PROTON_MAG_MOM_RATIO _2014

MUON_PROTON_MASS_RATIO _2014

MUON_TAU_MASS_RATIO _2014

NATURAL_UNIT_OF_ACTION _2014

NATURAL_UNIT_OF_ACTION_IN_EV_S _2014

NATURAL_UNIT_OF_ENERGY _2014

NATURAL_UNIT_OF_ENERGY_IN_MEV _2014

NATURAL_UNIT_OF_LENGTH _2014

NATURAL_UNIT_OF_MASS _2014

NATURAL_UNIT_OF_MOMUM _2014

NATURAL_UNIT_OF_MOMUM_IN_MEV_C _2014

NATURAL_UNIT_OF_TIME _2014

NATURAL_UNIT_OF_VELOCITY _2014

NEUTRON_COMPTON_WAVELENGTH _2014

NEUTRON_COMPTON_WAVELENGTH_OVER_2_PI _2014

NEUTRON_ELECTRON_MAG_MOM_RATIO _2014

NEUTRON_ELECTRON_MASS_RATIO _2014

NEUTRON_G_FACTOR _2014

NEUTRON_GYROMAG_RATIO _2014

NEUTRON_GYROMAG_RATIO_OVER_2_PI _2014

NEUTRON_MAG_MOM _2014

NEUTRON_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2014

NEUTRON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2014

NEUTRON_MASS _2014

NEUTRON_MASS_ENERGY_EQUIVALENT _2014

NEUTRON_MASS_ENERGY_EQUIVALENT_IN_MEV _2014

NEUTRON_MASS_IN_U _2014

NEUTRON_MOLAR_MASS _2014

NEUTRON_MUON_MASS_RATIO _2014

NEUTRON_PROTON_MAG_MOM_RATIO _2014

NEUTRON_PROTON_MASS_DIFFERENCE _2014

NEUTRON_PROTON_MASS_DIFFERENCE_ENERGY_EQUIVALENT _2014

NEUTRON_PROTON_MASS_DIFFERENCE_ENERGY_EQUIVALENT_IN_MEV _2014

NEUTRON_PROTON_MASS_DIFFERENCE_IN_U _2014

NEUTRON_PROTON_MASS_RATIO _2014

NEUTRON_TAU_MASS_RATIO _2014

NEUTRON_TO_SHIELDED_PROTON_MAG_MOM_RATIO _2014

NEWTONIAN_CONSTANT_OF_GRAVITATION _2014

NEWTONIAN_CONSTANT_OF_GRAVITATION_OVER_H_BAR_C _2014

NUCLEAR_MAGNETON _2014

NUCLEAR_MAGNETON_IN_EV_T _2014

NUCLEAR_MAGNETON_IN_INVERSE_METERS_PER_TESLA _2014

NUCLEAR_MAGNETON_IN_K_T _2014

NUCLEAR_MAGNETON_IN_MHZ_T _2014

PLANCK_CONSTANT _2014

PLANCK_CONSTANT_IN_EV_S _2014

PLANCK_CONSTANT_OVER_2_PI _2014

PLANCK_CONSTANT_OVER_2_PI_IN_EV_S _2014

PLANCK_CONSTANT_OVER_2_PI_TIMES_C_IN_MEV_FM _2014

PLANCK_LENGTH _2014

PLANCK_MASS _2014

PLANCK_MASS_ENERGY_EQUIVALENT_IN_GEV _2014

PLANCK_TEMPERATURE _2014

PLANCK_TIME _2014

PROTON_CHARGE_TO_MASS_QUOTIENT _2014

PROTON_COMPTON_WAVELENGTH _2014

PROTON_COMPTON_WAVELENGTH_OVER_2_PI _2014

PROTON_ELECTRON_MASS_RATIO _2014

PROTON_G_FACTOR _2014

PROTON_GYROMAG_RATIO _2014

PROTON_GYROMAG_RATIO_OVER_2_PI _2014

PROTON_MAG_MOM _2014

PROTON_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2014

PROTON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2014

PROTON_MAG_SHIELDING_CORRECTION _2014

PROTON_MASS _2014

PROTON_MASS_ENERGY_EQUIVALENT _2014

PROTON_MASS_ENERGY_EQUIVALENT_IN_MEV _2014

PROTON_MASS_IN_U _2014

PROTON_MOLAR_MASS _2014

PROTON_MUON_MASS_RATIO _2014

PROTON_NEUTRON_MAG_MOM_RATIO _2014

PROTON_NEUTRON_MASS_RATIO _2014

PROTON_RMS_CHARGE_RADIUS _2014

PROTON_TAU_MASS_RATIO _2014

QUANTUM_OF_CIRCULATION _2014

QUANTUM_OF_CIRCULATION_TIMES_2 _2014

RYDBERG_CONSTANT _2014

RYDBERG_CONSTANT_TIMES_C_IN_HZ _2014

RYDBERG_CONSTANT_TIMES_HC_IN_EV _2014

RYDBERG_CONSTANT_TIMES_HC_IN_J _2014

SACKUR_TETRODE_CONSTANT_1_K_100_KPA _2014

SACKUR_TETRODE_CONSTANT_1_K_101_325_KPA _2014

SECOND_RADIATION_CONSTANT _2014

SHIELDED_HELION_GYROMAG_RATIO _2014

SHIELDED_HELION_GYROMAG_RATIO_OVER_2_PI _2014

SHIELDED_HELION_MAG_MOM _2014

SHIELDED_HELION_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2014

SHIELDED_HELION_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2014

SHIELDED_HELION_TO_PROTON_MAG_MOM_RATIO _2014

SHIELDED_HELION_TO_SHIELDED_PROTON_MAG_MOM_RATIO _2014

SHIELDED_PROTON_GYROMAG_RATIO _2014

SHIELDED_PROTON_GYROMAG_RATIO_OVER_2_PI _2014

SHIELDED_PROTON_MAG_MOM _2014

SHIELDED_PROTON_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2014

SHIELDED_PROTON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2014

SPEED_OF_LIGHT_IN_VACUUM _2014

STANDARD_ACCELERATION_OF_GRAVITY _2014

STANDARD_ATMOSPHERE _2014

STANDARD_STATE_PRESSURE _2014

STEFAN_BOLTZMANN_CONSTANT _2014

TAU_COMPTON_WAVELENGTH _2014

TAU_COMPTON_WAVELENGTH_OVER_2_PI _2014

TAU_ELECTRON_MASS_RATIO _2014

TAU_MASS _2014

TAU_MASS_ENERGY_EQUIVALENT _2014

TAU_MASS_ENERGY_EQUIVALENT_IN_MEV _2014

TAU_MASS_IN_U _2014

TAU_MOLAR_MASS _2014

TAU_MUON_MASS_RATIO _2014

TAU_NEUTRON_MASS_RATIO _2014

TAU_PROTON_MASS_RATIO _2014

THOMSON_CROSS_SECTION _2014

TRITON_ELECTRON_MASS_RATIO _2014

TRITON_G_FACTOR _2014

TRITON_MAG_MOM _2014

TRITON_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2014

TRITON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2014

TRITON_MASS _2014

TRITON_MASS_ENERGY_EQUIVALENT _2014

TRITON_MASS_ENERGY_EQUIVALENT_IN_MEV _2014

TRITON_MASS_IN_U _2014

TRITON_MOLAR_MASS _2014

TRITON_PROTON_MASS_RATIO _2014

UNIFIED_ATOMIC_MASS_UNIT _2014

VON_KLITZING_CONSTANT _2014

WEAK_MIXING_ANGLE _2014

WIEN_FREQUENCY_DISPLACEMENT_LAW_CONSTANT _2014

WIEN_WAVELENGTH_DISPLACEMENT_LAW_CONSTANT _2014

CODATA 2010

List of available constants:

LATTICE_SPACING_OF_SILICON _2010

ALPHA_PARTICLE_ELECTRON_MASS_RATIO _2010

ALPHA_PARTICLE_MASS _2010

ALPHA_PARTICLE_MASS_ENERGY_EQUIVALENT _2010

ALPHA_PARTICLE_MASS_ENERGY_EQUIVALENT_IN_MEV _2010

ALPHA_PARTICLE_MASS_IN_U _2010

ALPHA_PARTICLE_MOLAR_MASS _2010

ALPHA_PARTICLE_PROTON_MASS_RATIO _2010

ANGSTROM_STAR _2010

ATOMIC_MASS_CONSTANT _2010

ATOMIC_MASS_CONSTANT_ENERGY_EQUIVALENT _2010

ATOMIC_MASS_CONSTANT_ENERGY_EQUIVALENT_IN_MEV _2010

ATOMIC_MASS_UNIT_ELECTRON_VOLT_RELATIONSHIP _2010

ATOMIC_MASS_UNIT_HARTREE_RELATIONSHIP _2010

ATOMIC_MASS_UNIT_HERTZ_RELATIONSHIP _2010

ATOMIC_MASS_UNIT_INVERSE_METER_RELATIONSHIP _2010

ATOMIC_MASS_UNIT_JOULE_RELATIONSHIP _2010

ATOMIC_MASS_UNIT_KELVIN_RELATIONSHIP _2010

ATOMIC_MASS_UNIT_KILOGRAM_RELATIONSHIP _2010

ATOMIC_UNIT_OF_1ST_HYPERPOLARIZABILITY _2010

ATOMIC_UNIT_OF_2ND_HYPERPOLARIZABILITY _2010

ATOMIC_UNIT_OF_ACTION _2010

ATOMIC_UNIT_OF_CHARGE _2010

ATOMIC_UNIT_OF_CHARGE_DENSITY _2010

ATOMIC_UNIT_OF_CURRENT _2010

ATOMIC_UNIT_OF_ELECTRIC_DIPOLE_MOM _2010

ATOMIC_UNIT_OF_ELECTRIC_FIELD _2010

ATOMIC_UNIT_OF_ELECTRIC_FIELD_GRADIENT _2010

ATOMIC_UNIT_OF_ELECTRIC_POLARIZABILITY _2010

ATOMIC_UNIT_OF_ELECTRIC_POTENTIAL _2010

ATOMIC_UNIT_OF_ELECTRIC_QUADRUPOLE_MOM _2010

ATOMIC_UNIT_OF_ENERGY _2010

ATOMIC_UNIT_OF_FORCE _2010

ATOMIC_UNIT_OF_LENGTH _2010

ATOMIC_UNIT_OF_MAG_DIPOLE_MOM _2010

ATOMIC_UNIT_OF_MAG_FLUX_DENSITY _2010

ATOMIC_UNIT_OF_MAGNETIZABILITY _2010

ATOMIC_UNIT_OF_MASS _2010

ATOMIC_UNIT_OF_MOMUM _2010

ATOMIC_UNIT_OF_PERMITTIVITY _2010

ATOMIC_UNIT_OF_TIME _2010

ATOMIC_UNIT_OF_VELOCITY _2010

AVOGADRO_CONSTANT _2010

BOHR_MAGNETON _2010

BOHR_MAGNETON_IN_EV_T _2010

BOHR_MAGNETON_IN_HZ_T _2010

BOHR_MAGNETON_IN_INVERSE_METERS_PER_TESLA _2010

BOHR_MAGNETON_IN_K_T _2010

BOHR_RADIUS _2010

BOLTZMANN_CONSTANT _2010

BOLTZMANN_CONSTANT_IN_EV_K _2010

BOLTZMANN_CONSTANT_IN_HZ_K _2010

BOLTZMANN_CONSTANT_IN_INVERSE_METERS_PER_KELVIN _2010

CHARACTERISTIC_IMPEDANCE_OF_VACUUM _2010

CLASSICAL_ELECTRON_RADIUS _2010

COMPTON_WAVELENGTH _2010

COMPTON_WAVELENGTH_OVER_2_PI _2010

CONDUCTANCE_QUANTUM _2010

CONVENTIONAL_VALUE_OF_JOSEPHSON_CONSTANT _2010

CONVENTIONAL_VALUE_OF_VON_KLITZING_CONSTANT _2010

CU_X_UNIT _2010

DEUTERON_ELECTRON_MAG_MOM_RATIO _2010

DEUTERON_ELECTRON_MASS_RATIO _2010

DEUTERON_G_FACTOR _2010

DEUTERON_MAG_MOM _2010

DEUTERON_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2010

DEUTERON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2010

DEUTERON_MASS _2010

DEUTERON_MASS_ENERGY_EQUIVALENT _2010

DEUTERON_MASS_ENERGY_EQUIVALENT_IN_MEV _2010

DEUTERON_MASS_IN_U _2010

DEUTERON_MOLAR_MASS _2010

DEUTERON_NEUTRON_MAG_MOM_RATIO _2010

DEUTERON_PROTON_MAG_MOM_RATIO _2010

DEUTERON_PROTON_MASS_RATIO _2010

DEUTERON_RMS_CHARGE_RADIUS _2010

ELECTRIC_CONSTANT _2010

ELECTRON_CHARGE_TO_MASS_QUOTIENT _2010

ELECTRON_DEUTERON_MAG_MOM_RATIO _2010

ELECTRON_DEUTERON_MASS_RATIO _2010

ELECTRON_G_FACTOR _2010

ELECTRON_GYROMAG_RATIO _2010

ELECTRON_GYROMAG_RATIO_OVER_2_PI _2010

ELECTRON_HELION_MASS_RATIO _2010

ELECTRON_MAG_MOM _2010

ELECTRON_MAG_MOM_ANOMALY _2010

ELECTRON_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2010

ELECTRON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2010

ELECTRON_MASS _2010

ELECTRON_MASS_ENERGY_EQUIVALENT _2010

ELECTRON_MASS_ENERGY_EQUIVALENT_IN_MEV _2010

ELECTRON_MASS_IN_U _2010

ELECTRON_MOLAR_MASS _2010

ELECTRON_MUON_MAG_MOM_RATIO _2010

ELECTRON_MUON_MASS_RATIO _2010

ELECTRON_NEUTRON_MAG_MOM_RATIO _2010

ELECTRON_NEUTRON_MASS_RATIO _2010

ELECTRON_PROTON_MAG_MOM_RATIO _2010

ELECTRON_PROTON_MASS_RATIO _2010

ELECTRON_TAU_MASS_RATIO _2010

ELECTRON_TO_ALPHA_PARTICLE_MASS_RATIO _2010

ELECTRON_TO_SHIELDED_HELION_MAG_MOM_RATIO _2010

ELECTRON_TO_SHIELDED_PROTON_MAG_MOM_RATIO _2010

ELECTRON_TRITON_MASS_RATIO _2010

ELECTRON_VOLT _2010

ELECTRON_VOLT_ATOMIC_MASS_UNIT_RELATIONSHIP _2010

ELECTRON_VOLT_HARTREE_RELATIONSHIP _2010

ELECTRON_VOLT_HERTZ_RELATIONSHIP _2010

ELECTRON_VOLT_INVERSE_METER_RELATIONSHIP _2010

ELECTRON_VOLT_JOULE_RELATIONSHIP _2010

ELECTRON_VOLT_KELVIN_RELATIONSHIP _2010

ELECTRON_VOLT_KILOGRAM_RELATIONSHIP _2010

ELEMENTARY_CHARGE _2010

ELEMENTARY_CHARGE_OVER_H _2010

FARADAY_CONSTANT _2010

FARADAY_CONSTANT_FOR_CONVENTIONAL_ELECTRIC_CURRENT _2010

FERMI_COUPLING_CONSTANT _2010

FINE_STRUCTURE_CONSTANT _2010

FIRST_RADIATION_CONSTANT _2010

FIRST_RADIATION_CONSTANT_FOR_SPECTRAL_RADIANCE _2010

HARTREE_ATOMIC_MASS_UNIT_RELATIONSHIP _2010

HARTREE_ELECTRON_VOLT_RELATIONSHIP _2010

HARTREE_ENERGY _2010

HARTREE_ENERGY_IN_EV _2010

HARTREE_HERTZ_RELATIONSHIP _2010

HARTREE_INVERSE_METER_RELATIONSHIP _2010

HARTREE_JOULE_RELATIONSHIP _2010

HARTREE_KELVIN_RELATIONSHIP _2010

HARTREE_KILOGRAM_RELATIONSHIP _2010

HELION_ELECTRON_MASS_RATIO _2010

HELION_G_FACTOR _2010

HELION_MAG_MOM _2010

HELION_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2010

HELION_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2010

HELION_MASS _2010

HELION_MASS_ENERGY_EQUIVALENT _2010

HELION_MASS_ENERGY_EQUIVALENT_IN_MEV _2010

HELION_MASS_IN_U _2010

HELION_MOLAR_MASS _2010

HELION_PROTON_MASS_RATIO _2010

HERTZ_ATOMIC_MASS_UNIT_RELATIONSHIP _2010

HERTZ_ELECTRON_VOLT_RELATIONSHIP _2010

HERTZ_HARTREE_RELATIONSHIP _2010

HERTZ_INVERSE_METER_RELATIONSHIP _2010

HERTZ_JOULE_RELATIONSHIP _2010

HERTZ_KELVIN_RELATIONSHIP _2010

HERTZ_KILOGRAM_RELATIONSHIP _2010

INVERSE_FINE_STRUCTURE_CONSTANT _2010

INVERSE_METER_ATOMIC_MASS_UNIT_RELATIONSHIP _2010

INVERSE_METER_ELECTRON_VOLT_RELATIONSHIP _2010

INVERSE_METER_HARTREE_RELATIONSHIP _2010

INVERSE_METER_HERTZ_RELATIONSHIP _2010

INVERSE_METER_JOULE_RELATIONSHIP _2010

INVERSE_METER_KELVIN_RELATIONSHIP _2010

INVERSE_METER_KILOGRAM_RELATIONSHIP _2010

INVERSE_OF_CONDUCTANCE_QUANTUM _2010

JOSEPHSON_CONSTANT _2010

JOULE_ATOMIC_MASS_UNIT_RELATIONSHIP _2010

JOULE_ELECTRON_VOLT_RELATIONSHIP _2010

JOULE_HARTREE_RELATIONSHIP _2010

JOULE_HERTZ_RELATIONSHIP _2010

JOULE_INVERSE_METER_RELATIONSHIP _2010

JOULE_KELVIN_RELATIONSHIP _2010

JOULE_KILOGRAM_RELATIONSHIP _2010

KELVIN_ATOMIC_MASS_UNIT_RELATIONSHIP _2010

KELVIN_ELECTRON_VOLT_RELATIONSHIP _2010

KELVIN_HARTREE_RELATIONSHIP _2010

KELVIN_HERTZ_RELATIONSHIP _2010

KELVIN_INVERSE_METER_RELATIONSHIP _2010

KELVIN_JOULE_RELATIONSHIP _2010

KELVIN_KILOGRAM_RELATIONSHIP _2010

KILOGRAM_ATOMIC_MASS_UNIT_RELATIONSHIP _2010

KILOGRAM_ELECTRON_VOLT_RELATIONSHIP _2010

KILOGRAM_HARTREE_RELATIONSHIP _2010

KILOGRAM_HERTZ_RELATIONSHIP _2010

KILOGRAM_INVERSE_METER_RELATIONSHIP _2010

KILOGRAM_JOULE_RELATIONSHIP _2010

KILOGRAM_KELVIN_RELATIONSHIP _2010

LATTICE_PARAMETER_OF_SILICON _2010

LOSCHMIDT_CONSTANT_273_15_K_100_KPA _2010

LOSCHMIDT_CONSTANT_273_15_K_101_325_KPA _2010

MAG_CONSTANT _2010

MAG_FLUX_QUANTUM _2010

MOLAR_GAS_CONSTANT _2010

MOLAR_MASS_CONSTANT _2010

MOLAR_MASS_OF_CARBON_12 _2010

MOLAR_PLANCK_CONSTANT _2010

MOLAR_PLANCK_CONSTANT_TIMES_C _2010

MOLAR_VOLUME_OF_IDEAL_GAS_273_15_K_100_KPA _2010

MOLAR_VOLUME_OF_IDEAL_GAS_273_15_K_101_325_KPA _2010

MOLAR_VOLUME_OF_SILICON _2010

MO_X_UNIT _2010

MUON_COMPTON_WAVELENGTH _2010

MUON_COMPTON_WAVELENGTH_OVER_2_PI _2010

MUON_ELECTRON_MASS_RATIO _2010

MUON_G_FACTOR _2010

MUON_MAG_MOM _2010

MUON_MAG_MOM_ANOMALY _2010

MUON_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2010

MUON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2010

MUON_MASS _2010

MUON_MASS_ENERGY_EQUIVALENT _2010

MUON_MASS_ENERGY_EQUIVALENT_IN_MEV _2010

MUON_MASS_IN_U _2010

MUON_MOLAR_MASS _2010

MUON_NEUTRON_MASS_RATIO _2010

MUON_PROTON_MAG_MOM_RATIO _2010

MUON_PROTON_MASS_RATIO _2010

MUON_TAU_MASS_RATIO _2010

NATURAL_UNIT_OF_ACTION _2010

NATURAL_UNIT_OF_ACTION_IN_EV_S _2010

NATURAL_UNIT_OF_ENERGY _2010

NATURAL_UNIT_OF_ENERGY_IN_MEV _2010

NATURAL_UNIT_OF_LENGTH _2010

NATURAL_UNIT_OF_MASS _2010

NATURAL_UNIT_OF_MOMUM _2010

NATURAL_UNIT_OF_MOMUM_IN_MEV_C _2010

NATURAL_UNIT_OF_TIME _2010

NATURAL_UNIT_OF_VELOCITY _2010

NEUTRON_COMPTON_WAVELENGTH _2010

NEUTRON_COMPTON_WAVELENGTH_OVER_2_PI _2010

NEUTRON_ELECTRON_MAG_MOM_RATIO _2010

NEUTRON_ELECTRON_MASS_RATIO _2010

NEUTRON_G_FACTOR _2010

NEUTRON_GYROMAG_RATIO _2010

NEUTRON_GYROMAG_RATIO_OVER_2_PI _2010

NEUTRON_MAG_MOM _2010

NEUTRON_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2010

NEUTRON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2010

NEUTRON_MASS _2010

NEUTRON_MASS_ENERGY_EQUIVALENT _2010

NEUTRON_MASS_ENERGY_EQUIVALENT_IN_MEV _2010

NEUTRON_MASS_IN_U _2010

NEUTRON_MOLAR_MASS _2010

NEUTRON_MUON_MASS_RATIO _2010

NEUTRON_PROTON_MAG_MOM_RATIO _2010

NEUTRON_PROTON_MASS_DIFFERENCE _2010

NEUTRON_PROTON_MASS_DIFFERENCE_ENERGY_EQUIVALENT _2010

NEUTRON_PROTON_MASS_DIFFERENCE_ENERGY_EQUIVALENT_IN_MEV _2010

NEUTRON_PROTON_MASS_DIFFERENCE_IN_U _2010

NEUTRON_PROTON_MASS_RATIO _2010

NEUTRON_TAU_MASS_RATIO _2010

NEUTRON_TO_SHIELDED_PROTON_MAG_MOM_RATIO _2010

NEWTONIAN_CONSTANT_OF_GRAVITATION _2010

NEWTONIAN_CONSTANT_OF_GRAVITATION_OVER_H_BAR_C _2010

NUCLEAR_MAGNETON _2010

NUCLEAR_MAGNETON_IN_EV_T _2010

NUCLEAR_MAGNETON_IN_INVERSE_METERS_PER_TESLA _2010

NUCLEAR_MAGNETON_IN_K_T _2010

NUCLEAR_MAGNETON_IN_MHZ_T _2010

PLANCK_CONSTANT _2010

PLANCK_CONSTANT_IN_EV_S _2010

PLANCK_CONSTANT_OVER_2_PI _2010

PLANCK_CONSTANT_OVER_2_PI_IN_EV_S _2010

PLANCK_CONSTANT_OVER_2_PI_TIMES_C_IN_MEV_FM _2010

PLANCK_LENGTH _2010

PLANCK_MASS _2010

PLANCK_MASS_ENERGY_EQUIVALENT_IN_GEV _2010

PLANCK_TEMPERATURE _2010

PLANCK_TIME _2010

PROTON_CHARGE_TO_MASS_QUOTIENT _2010

PROTON_COMPTON_WAVELENGTH _2010

PROTON_COMPTON_WAVELENGTH_OVER_2_PI _2010

PROTON_ELECTRON_MASS_RATIO _2010

PROTON_G_FACTOR _2010

PROTON_GYROMAG_RATIO _2010

PROTON_GYROMAG_RATIO_OVER_2_PI _2010

PROTON_MAG_MOM _2010

PROTON_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2010

PROTON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2010

PROTON_MAG_SHIELDING_CORRECTION _2010

PROTON_MASS _2010

PROTON_MASS_ENERGY_EQUIVALENT _2010

PROTON_MASS_ENERGY_EQUIVALENT_IN_MEV _2010

PROTON_MASS_IN_U _2010

PROTON_MOLAR_MASS _2010

PROTON_MUON_MASS_RATIO _2010

PROTON_NEUTRON_MAG_MOM_RATIO _2010

PROTON_NEUTRON_MASS_RATIO _2010

PROTON_RMS_CHARGE_RADIUS _2010

PROTON_TAU_MASS_RATIO _2010

QUANTUM_OF_CIRCULATION _2010

QUANTUM_OF_CIRCULATION_TIMES_2 _2010

RYDBERG_CONSTANT _2010

RYDBERG_CONSTANT_TIMES_C_IN_HZ _2010

RYDBERG_CONSTANT_TIMES_HC_IN_EV _2010

RYDBERG_CONSTANT_TIMES_HC_IN_J _2010

SACKUR_TETRODE_CONSTANT_1_K_100_KPA _2010

SACKUR_TETRODE_CONSTANT_1_K_101_325_KPA _2010

SECOND_RADIATION_CONSTANT _2010

SHIELDED_HELION_GYROMAG_RATIO _2010

SHIELDED_HELION_GYROMAG_RATIO_OVER_2_PI _2010

SHIELDED_HELION_MAG_MOM _2010

SHIELDED_HELION_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2010

SHIELDED_HELION_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2010

SHIELDED_HELION_TO_PROTON_MAG_MOM_RATIO _2010

SHIELDED_HELION_TO_SHIELDED_PROTON_MAG_MOM_RATIO _2010

SHIELDED_PROTON_GYROMAG_RATIO _2010

SHIELDED_PROTON_GYROMAG_RATIO_OVER_2_PI _2010

SHIELDED_PROTON_MAG_MOM _2010

SHIELDED_PROTON_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2010

SHIELDED_PROTON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2010

SPEED_OF_LIGHT_IN_VACUUM _2010

STANDARD_ACCELERATION_OF_GRAVITY _2010

STANDARD_ATMOSPHERE _2010

STANDARD_STATE_PRESSURE _2010

STEFAN_BOLTZMANN_CONSTANT _2010

TAU_COMPTON_WAVELENGTH _2010

TAU_COMPTON_WAVELENGTH_OVER_2_PI _2010

TAU_ELECTRON_MASS_RATIO _2010

TAU_MASS _2010

TAU_MASS_ENERGY_EQUIVALENT _2010

TAU_MASS_ENERGY_EQUIVALENT_IN_MEV _2010

TAU_MASS_IN_U _2010

TAU_MOLAR_MASS _2010

TAU_MUON_MASS_RATIO _2010

TAU_NEUTRON_MASS_RATIO _2010

TAU_PROTON_MASS_RATIO _2010

THOMSON_CROSS_SECTION _2010

TRITON_ELECTRON_MASS_RATIO _2010

TRITON_G_FACTOR _2010

TRITON_MAG_MOM _2010

TRITON_MAG_MOM_TO_BOHR_MAGNETON_RATIO _2010

TRITON_MAG_MOM_TO_NUCLEAR_MAGNETON_RATIO _2010

TRITON_MASS _2010

TRITON_MASS_ENERGY_EQUIVALENT _2010

TRITON_MASS_ENERGY_EQUIVALENT_IN_MEV _2010

TRITON_MASS_IN_U _2010

TRITON_MOLAR_MASS _2010

TRITON_PROTON_MASS_RATIO _2010

UNIFIED_ATOMIC_MASS_UNIT _2010

VON_KLITZING_CONSTANT _2010

WEAK_MIXING_ANGLE _2010

WIEN_FREQUENCY_DISPLACEMENT_LAW_CONSTANT _2010

WIEN_WAVELENGTH_DISPLACEMENT_LAW_CONSTANT _2010