Physical Constants

Physical constants in PSI4

Label

Value

Description

_220_lattice_spacing_of_silicon

1.920155714E-10

{220} lattice spacing of silicon [m] uncertainty=0.000 0032 e-12

alpha_particle_electron_mass_ratio

7294.29954136

alpha particle-electron mass ratio [] uncertainty=0.000 000 24

alpha_particle_mass

6.644657230E-27

alpha particle mass [kg] uncertainty=0.000 000 082 e-27

alpha_particle_mass_energy_equivalent

5.971920097E-10

alpha particle mass energy equivalent [J] uncertainty=0.000 000 073 e-10

alpha_particle_mass_energy_equivalent_in_MeV

3727.379378

alpha particle mass energy equivalent in MeV [MeV] uncertainty=0.000 023

alpha_particle_mass_in_u

4.001506179127

alpha particle mass in u [u] uncertainty=0.000 000 000 063

alpha_particle_molar_mass

0.004001506179127

alpha particle molar mass [kg mol^{-1}] uncertainty=0.000 000 000 063 e-3

alpha_particle_proton_mass_ratio

3.97259968907

alpha particle-proton mass ratio [] uncertainty=0.000 000 000 36

Angstrom_star

1.00001495E-10

Angstrom star [m] uncertainty=0.000 000 90 e-10

atomic_mass_constant

1.660539040E-27

atomic mass constant [kg] uncertainty=0.000 000 020 e-27

atomic_mass_constant_energy_equivalent

1.492418062E-10

atomic mass constant energy equivalent [J] uncertainty=0.000 000 018 e-10

atomic_mass_constant_energy_equivalent_in_MeV

931.4940954

atomic mass constant energy equivalent in MeV [MeV] uncertainty=0.000 0057

atomic_mass_unit_electron_volt_relationship

931494095.4

atomic mass unit-electron volt relationship [eV] uncertainty=0.000 0057 e6

atomic_mass_unit_hartree_relationship

34231776.902

atomic mass unit-hartree relationship [E_h] uncertainty=0.000 000 0016 e7

atomic_mass_unit_hertz_relationship

2.2523427206E+23

atomic mass unit-hertz relationship [Hz] uncertainty=0.000 000 0010 e23

atomic_mass_unit_inverse_meter_relationship

7.5130066166E+14

atomic mass unit-inverse meter relationship [m^{-1}] uncertainty=0.000 000 0034 e14

atomic_mass_unit_joule_relationship

1.492418062E-10

atomic mass unit-joule relationship [J] uncertainty=0.000 000 018 e-10

atomic_mass_unit_kelvin_relationship

1.08095438E+13

atomic mass unit-kelvin relationship [K] uncertainty=0.000 000 62 e13

atomic_mass_unit_kilogram_relationship

1.660539040E-27

atomic mass unit-kilogram relationship [kg] uncertainty=0.000 000 020 e-27

atomic_unit_of_1st_hyperpolarizability

3.206361329E-53

atomic unit of 1st hyperpolarizability [C^3 m^3 J^{-2}] uncertainty=0.000 000 020 e-53

atomic_unit_of_2nd_hyperpolarizability

6.235380085E-65

atomic unit of 2nd hyperpolarizability [C^4 m^4 J^{-3}] uncertainty=0.000 000 077 e-65

atomic_unit_of_action

1.054571800E-34

atomic unit of action [J s] uncertainty=0.000 000 013 e-34

atomic_unit_of_charge

1.6021766208E-19

atomic unit of charge [C] uncertainty=0.000 000 0098 e-19

atomic_unit_of_charge_density

1.0812023770E+12

atomic unit of charge density [C m^{-3}] uncertainty=0.000 000 0067 e12

atomic_unit_of_current

0.006623618183

atomic unit of current [A] uncertainty=0.000 000 041 e-3

atomic_unit_of_electric_dipole_mom

8.478353552E-30

atomic unit of electric dipole mom. [C m] uncertainty=0.000 000 052 e-30

atomic_unit_of_electric_field

5.142206707E+11

atomic unit of electric field [V m^{-1}] uncertainty=0.000 000 032 e11

atomic_unit_of_electric_field_gradient

9.717362356E+21

atomic unit of electric field gradient [V m^{-2}] uncertainty=0.000 000 060 e21

atomic_unit_of_electric_polarizability

1.6487772731E-41

atomic unit of electric polarizability [C^2 m^2 J^{-1}] uncertainty=0.000 000 0011 e-41

atomic_unit_of_electric_potential

27.21138602

atomic unit of electric potential [V] uncertainty=0.000 000 17

atomic_unit_of_electric_quadrupole_mom

4.486551484E-40

atomic unit of electric quadrupole mom. [C m^2] uncertainty=0.000 000 028 e-40

atomic_unit_of_energy

4.359744650E-18

atomic unit of energy [J] uncertainty=0.000 000 054 e-18

atomic_unit_of_force

8.23872336E-8

atomic unit of force [N] uncertainty=0.000 000 10 e-8

atomic_unit_of_length

5.2917721067E-11

atomic unit of length [m] uncertainty=0.000 000 000 12 e-10

atomic_unit_of_mag_dipole_mom

1.854801999E-23

atomic unit of mag. dipole mom. [J T^{-1}] uncertainty=0.000 000 011 e-23

atomic_unit_of_mag_flux_density

235051.7550

atomic unit of mag. flux density [T] uncertainty=0.000 000 014 e5

atomic_unit_of_magnetizability

7.8910365886E-29

atomic unit of magnetizability [J T^{-2}] uncertainty=0.000 000 0090 e-29

atomic_unit_of_mass

9.10938356E-31

atomic unit of mass [kg] uncertainty=0.000 000 11 e-31

atomic_unit_of_momum

1.992851882E-24

atomic unit of mom.um [kg m s^{-1}] uncertainty=0.000 000 024 e-24

atomic_unit_of_permittivity

1.112650056E-10

atomic unit of permittivity [F m^{-1}] uncertainty=(exact)

atomic_unit_of_time

2.418884326509E-17

atomic unit of time [s] uncertainty=0.000 000 000 014 e-17

atomic_unit_of_velocity

2187691.26277

atomic unit of velocity [m s^{-1}] uncertainty=0.000 000 000 50 e6

Avogadro_constant

6.022140857E+23

Avogadro constant [mol^{-1}] uncertainty=0.000 000 074 e23

Bohr_magneton

9.274009994E-24

Bohr magneton [J T^{-1}] uncertainty=0.000 0057 e-26

Bohr_magneton_in_eVpT

0.000057883818012

Bohr magneton in eV/T [eV T^{-1}] uncertainty=0.000 000 0026 e-5

Bohr_magneton_in_HzpT

13996245042

Bohr magneton in Hz/T [Hz T^{-1}] uncertainty=0.000 000 086 e9

Bohr_magneton_in_inverse_meters_per_tesla

46.68644814

Bohr magneton in inverse meters per tesla [m^{-1} T^{-1}] uncertainty=0.000 000 29

Bohr_magneton_in_KpT

0.67171405

Bohr magneton in K/T [K T^{-1}] uncertainty=0.000 000 39

Bohr_radius

5.2917721067E-11

Bohr radius [m] uncertainty=0.000 000 000 12 e-10

Boltzmann_constant

1.38064852E-23

Boltzmann constant [J K^{-1}] uncertainty=0.000 000 79 e-23

Boltzmann_constant_in_eVpK

0.000086173303

Boltzmann constant in eV/K [eV K^{-1}] uncertainty=0.000 0050 e-5

Boltzmann_constant_in_HzpK

2.0836612E+10

Boltzmann constant in Hz/K [Hz K^{-1}] uncertainty=0.000 0012 e10

Boltzmann_constant_in_inverse_meters_per_kelvin

69.503457

Boltzmann constant in inverse meters per kelvin [m^{-1} K^{-1}] uncertainty=0.000 040

characteristic_impedance_of_vacuum

376.730313461

characteristic impedance of vacuum [ohm] uncertainty=(exact)

classical_electron_radius

2.8179403227E-15

classical electron radius [m] uncertainty=0.000 000 0019 e-15

Compton_wavelength

2.4263102367E-12

Compton wavelength [m] uncertainty=0.000 000 0011 e-12

Compton_wavelength_over_2_pi

3.8615926764E-13

Compton wavelength over 2 pi [m] uncertainty=0.000 000 18 e-15

conductance_quantum

0.000077480917310

conductance quantum [S] uncertainty=0.000 000 0018 e-5

conventional_value_of_Josephson_constant

4.835979E+14

conventional value of Josephson constant [Hz V^{-1}] uncertainty=(exact)

conventional_value_of_von_Klitzing_constant

25812.807

conventional value of von Klitzing constant [ohm] uncertainty=(exact)

Cu_x_unit

1.00207697E-13

Cu x unit [m] uncertainty=0.000 000 28 e-13

deuteron_electron_mag_mom_ratio

-0.0004664345535

deuteron-electron mag. mom. ratio [] uncertainty=0.000 000 026 e-4

deuteron_electron_mass_ratio

3670.48296785

deuteron-electron mass ratio [] uncertainty=0.000 000 13

deuteron_g_factor

0.8574382311

deuteron g factor [] uncertainty=0.000 000 0048

deuteron_mag_mom

4.330735040E-27

deuteron mag. mom. [J T^{-1}] uncertainty=0.000 000 0036 e-26

deuteron_mag_mom_to_Bohr_magneton_ratio

0.0004669754554

deuteron mag. mom. to Bohr magneton ratio [] uncertainty=0.000 000 0026 e-3

deuteron_mag_mom_to_nuclear_magneton_ratio

0.8574382311

deuteron mag. mom. to nuclear magneton ratio [] uncertainty=0.000 000 0048

deuteron_mass

3.343583719E-27

deuteron mass [kg] uncertainty=0.000 000 041 e-27

deuteron_mass_energy_equivalent

3.005063183E-10

deuteron mass energy equivalent [J] uncertainty=0.000 000 037 e-10

deuteron_mass_energy_equivalent_in_MeV

1875.612928

deuteron mass energy equivalent in MeV [MeV] uncertainty=0.000 012

deuteron_mass_in_u

2.013553212745

deuteron mass in u [u] uncertainty=0.000 000 000 040

deuteron_molar_mass

0.002013553212745

deuteron molar mass [kg mol^{-1}] uncertainty=0.000 000 000 040 e-3

deuteron_neutron_mag_mom_ratio

-0.44820652

deuteron-neutron mag. mom. ratio [] uncertainty=0.000 000 11

deuteron_proton_mag_mom_ratio

0.3070122077

deuteron-proton mag. mom. ratio [] uncertainty=0.000 000 0015

deuteron_proton_mass_ratio

1.99900750087

deuteron-proton mass ratio [] uncertainty=0.000 000 000 19

deuteron_rms_charge_radius

2.1413E-15

deuteron rms charge radius [m] uncertainty=0.0025 e-15

electric_constant

8.854187817E-12

electric constant [F m^{-1}] uncertainty=(exact)

electron_charge_to_mass_quotient

-1.758820024E+11

electron charge to mass quotient [C kg^{-1}] uncertainty=0.000 000 011 e11

electron_deuteron_mag_mom_ratio

-2143.923499

electron-deuteron mag. mom. ratio [] uncertainty=0.000 012

electron_deuteron_mass_ratio

0.0002724437107484

electron-deuteron mass ratio [] uncertainty=0.000 000 000 096 e-4

electron_g_factor

-2.00231930436182

electron g factor [] uncertainty=0.000 000 000 000 52

electron_gyromag_ratio

1.760859644E+11

electron gyromag. ratio [s^{-1} T^{-1}] uncertainty=0.000 000 011 e11

electron_gyromag_ratio_over_2_pi

28024.95164

electron gyromag. ratio over 2 pi [MHz T^{-1}] uncertainty=0.000 17

electron_helion_mass_ratio

0.0001819543074854

electron-helion mass ratio [] uncertainty=0.000 000 000 088 e-4

electron_mag_mom

-9.284764620E-24

electron mag. mom. [J T^{-1}] uncertainty=0.000 0057 e-26

electron_mag_mom_anomaly

0.00115965218091

electron mag. mom. anomaly [] uncertainty=0.000 000 000 26 e-3

electron_mag_mom_to_Bohr_magneton_ratio

-1.00115965218091

electron mag. mom. to Bohr magneton ratio [] uncertainty=0.000 000 000 000 26

electron_mag_mom_to_nuclear_magneton_ratio

-1838.28197234

electron mag. mom. to nuclear magneton ratio [] uncertainty=0.000 000 17

electron_mass

9.10938356E-31

electron mass [kg] uncertainty=0.000 000 11 e-31

electron_mass_energy_equivalent

8.18710565E-14

electron mass energy equivalent [J] uncertainty=0.000 000 10 e-14

electron_mass_energy_equivalent_in_MeV

0.5109989461

electron mass energy equivalent in MeV [MeV] uncertainty=0.000 000 0031

electron_mass_in_u

0.000548579909070

electron mass in u [u] uncertainty=0.000 000 000 16 e-4

electron_molar_mass

5.48579909070E-7

electron molar mass [kg mol^{-1}] uncertainty=0.000 000 000 16 e-7

electron_muon_mag_mom_ratio

206.7669880

electron-muon mag. mom. ratio [] uncertainty=0.000 0046

electron_muon_mass_ratio

0.00483633170

electron-muon mass ratio [] uncertainty=0.000 000 11 e-3

electron_neutron_mag_mom_ratio

960.92050

electron-neutron mag. mom. ratio [] uncertainty=0.000 23

electron_neutron_mass_ratio

0.00054386734428

electron-neutron mass ratio [] uncertainty=0.000 000 0027 e-4

electron_proton_mag_mom_ratio

-658.2106866

electron-proton mag. mom. ratio [] uncertainty=0.000 0020

electron_proton_mass_ratio

0.000544617021352

electron-proton mass ratio [] uncertainty=0.000 000 000 52 e-4

electron_tau_mass_ratio

0.000287592

electron-tau mass ratio [] uncertainty=0.000 26 e-4

electron_to_alpha_particle_mass_ratio

0.0001370933554798

electron to alpha particle mass ratio [] uncertainty=0.000 000 000 045 e-4

electron_to_shielded_helion_mag_mom_ratio

864.058257

electron to shielded helion mag. mom. ratio [] uncertainty=0.000 010

electron_to_shielded_proton_mag_mom_ratio

-658.2275971

electron to shielded proton mag. mom. ratio [] uncertainty=0.000 0072

electron_triton_mass_ratio

0.0001819200062203

electron-triton mass ratio [] uncertainty=0.000 000 000 084 e-4

electron_volt

1.6021766208E-19

electron volt [J] uncertainty=0.000 000 0098 e-19

electron_volt_atomic_mass_unit_relationship

1.0735441105E-9

electron volt-atomic mass unit relationship [u] uncertainty=0.000 000 0066 e-9

electron_volt_hartree_relationship

0.03674932248

electron volt-hartree relationship [E_h] uncertainty=0.000 000 023 e-2

electron_volt_hertz_relationship

2.417989262E+14

electron volt-hertz relationship [Hz] uncertainty=0.000 000 015 e14

electron_volt_inverse_meter_relationship

806554.4005

electron volt-inverse meter relationship [m^{-1}] uncertainty=0.000 000 050 e5

electron_volt_joule_relationship

1.6021766208E-19

electron volt-joule relationship [J] uncertainty=0.000 000 0098 e-19

electron_volt_kelvin_relationship

11604.5221

electron volt-kelvin relationship [K] uncertainty=0.000 000 67 e4

electron_volt_kilogram_relationship

1.782661907E-36

electron volt-kilogram relationship [kg] uncertainty=0.000 000 011 e-36

elementary_charge

1.6021766208E-19

elementary charge [C] uncertainty=0.000 000 0098 e-19

elementary_charge_over_h

2.417989262E+14

elementary charge over h [A J^{-1}] uncertainty=0.000 000 015 e14

Faraday_constant

96485.33289

Faraday constant [C mol^{-1}] uncertainty=0.000 59

Faraday_constant_for_conventional_electric_current

96485.3251

Faraday constant for conventional electric current [C_{90} mol^{-1}] uncertainty=0.0012

Fermi_coupling_constant

0.000011663787

Fermi coupling constant [GeV^{-2}] uncertainty=0.000 0006 e-5

fine_structure_constant

0.0072973525664

fine-structure constant [] uncertainty=0.000 000 0017 e-3

first_radiation_constant

3.741771790E-16

first radiation constant [W m^2] uncertainty=0.000 000 046 e-16

first_radiation_constant_for_spectral_radiance

1.191042953E-16

first radiation constant for spectral radiance [W m^2 sr^{-1}] uncertainty=0.000 000 015 e-16

hartree_atomic_mass_unit_relationship

2.9212623197E-8

hartree-atomic mass unit relationship [u] uncertainty=0.000 000 0013 e-8

hartree_electron_volt_relationship

27.21138602

hartree-electron volt relationship [eV] uncertainty=0.000 000 17

Hartree_energy

4.359744650E-18

Hartree energy [J] uncertainty=0.000 000 054 e-18

Hartree_energy_in_eV

27.21138602

Hartree energy in eV [eV] uncertainty=0.000 000 17

hartree_hertz_relationship

6.579683920711E+15

hartree-hertz relationship [Hz] uncertainty=0.000 000 000 039 e15

hartree_inverse_meter_relationship

21947463.13702

hartree-inverse meter relationship [m^{-1}] uncertainty=0.000 000 000 013 e7

hartree_joule_relationship

4.359744650E-18

hartree-joule relationship [J] uncertainty=0.000 000 054 e-18

hartree_kelvin_relationship

315775.13

hartree-kelvin relationship [K] uncertainty=0.000 0018 e5

hartree_kilogram_relationship

4.850870129E-35

hartree-kilogram relationship [kg] uncertainty=0.000 000 060 e-35

helion_electron_mass_ratio

5495.88527922

helion-electron mass ratio [] uncertainty=0.000 000 27

helion_g_factor

-4.255250616

helion g factor [] uncertainty=0.000 000 050

helion_mag_mom

-1.074617522E-26

helion mag. mom. [J T^{-1}] uncertainty=0.000 000 014 e-26

helion_mag_mom_to_Bohr_magneton_ratio

-0.001158740958

helion mag. mom. to Bohr magneton ratio [] uncertainty=0.000 000 014 e-3

helion_mag_mom_to_nuclear_magneton_ratio

-2.127625308

helion mag. mom. to nuclear magneton ratio [] uncertainty=0.000 000 025

helion_mass

5.006412700E-27

helion mass [kg] uncertainty=0.000 000 062 e-27

helion_mass_energy_equivalent

4.499539341E-10

helion mass energy equivalent [J] uncertainty=0.000 000 055 e-10

helion_mass_energy_equivalent_in_MeV

2808.391586

helion mass energy equivalent in MeV [MeV] uncertainty=0.000 017

helion_mass_in_u

3.01493224673

helion mass in u [u] uncertainty=0.000 000 000 12

helion_molar_mass

0.00301493224673

helion molar mass [kg mol^{-1}] uncertainty=0.000 000 000 12 e-3

helion_proton_mass_ratio

2.99315267046

helion-proton mass ratio [] uncertainty=0.000 000 000 29

hertz_atomic_mass_unit_relationship

4.4398216616E-24

hertz-atomic mass unit relationship [u] uncertainty=0.000 000 0020 e-24

hertz_electron_volt_relationship

4.135667662E-15

hertz-electron volt relationship [eV] uncertainty=0.000 000 025 e-15

hertz_hartree_relationship

1.5198298460088E-16

hertz-hartree relationship [E_h] uncertainty=0.000 000 000 0090 e-16

hertz_inverse_meter_relationship

3.335640951E-9

hertz-inverse meter relationship [m^{-1}] uncertainty=(exact)

hertz_joule_relationship

6.626070040E-34

hertz-joule relationship [J] uncertainty=0.000 000 081 e-34

hertz_kelvin_relationship

4.7992447E-11

hertz-kelvin relationship [K] uncertainty=0.000 0028 e-11

hertz_kilogram_relationship

7.372497201E-51

hertz-kilogram relationship [kg] uncertainty=0.000 000 091 e-51

inverse_fine_structure_constant

137.035999139

inverse fine-structure constant [] uncertainty=0.000 000 031

inverse_meter_atomic_mass_unit_relationship

1.33102504900E-15

inverse meter-atomic mass unit relationship [u] uncertainty=0.000 000 000 61 e-15

inverse_meter_electron_volt_relationship

0.0000012398419739

inverse meter-electron volt relationship [eV] uncertainty=0.000 000 0076 e-6

inverse_meter_hartree_relationship

4.556335252767E-8

inverse meter-hartree relationship [E_h] uncertainty=0.000 000 000 027 e-8

inverse_meter_hertz_relationship

299792458

inverse meter-hertz relationship [Hz] uncertainty=(exact)

inverse_meter_joule_relationship

1.986445824E-25

inverse meter-joule relationship [J] uncertainty=0.000 000 024 e-25

inverse_meter_kelvin_relationship

0.0143877736

inverse meter-kelvin relationship [K] uncertainty=0.000 000 83 e-2

inverse_meter_kilogram_relationship

2.210219057E-42

inverse meter-kilogram relationship [kg] uncertainty=0.000 000 027 e-42

inverse_of_conductance_quantum

12906.4037278

inverse of conductance quantum [ohm] uncertainty=0.000 0029

Josephson_constant

4.835978525E+14

Josephson constant [Hz V^{-1}] uncertainty=0.0030 e9

joule_atomic_mass_unit_relationship

6700535363

joule-atomic mass unit relationship [u] uncertainty=0.000 000 082 e9

joule_electron_volt_relationship

6.241509126E+18

joule-electron volt relationship [eV] uncertainty=0.000 000 038 e18

joule_hartree_relationship

2.293712317E+17

joule-hartree relationship [E_h] uncertainty=0.000 000 028 e17

joule_hertz_relationship

1.509190205E+33

joule-hertz relationship [Hz] uncertainty=0.000 000 019 e33

joule_inverse_meter_relationship

5.034116651E+24

joule-inverse meter relationship [m^{-1}] uncertainty=0.000 000 062 e24

joule_kelvin_relationship

7.2429731E+22

joule-kelvin relationship [K] uncertainty=0.000 0042 e22

joule_kilogram_relationship

1.112650056E-17

joule-kilogram relationship [kg] uncertainty=(exact)

kelvin_atomic_mass_unit_relationship

9.2510842E-14

kelvin-atomic mass unit relationship [u] uncertainty=0.000 0053 e-14

kelvin_electron_volt_relationship

0.000086173303

kelvin-electron volt relationship [eV] uncertainty=0.000 0050 e-5

kelvin_hartree_relationship

0.0000031668105

kelvin-hartree relationship [E_h] uncertainty=0.000 0018 e-6

kelvin_hertz_relationship

2.0836612E+10

kelvin-hertz relationship [Hz] uncertainty=0.000 0012 e10

kelvin_inverse_meter_relationship

69.503457

kelvin-inverse meter relationship [m^{-1}] uncertainty=0.000 040

kelvin_joule_relationship

1.38064852E-23

kelvin-joule relationship [J] uncertainty=0.000 000 79 e-23

kelvin_kilogram_relationship

1.53617865E-40

kelvin-kilogram relationship [kg] uncertainty=0.000 000 88 e-40

kilogram_atomic_mass_unit_relationship

6.022140857E+26

kilogram-atomic mass unit relationship [u] uncertainty=0.000 000 074 e26

kilogram_electron_volt_relationship

5.609588650E+35

kilogram-electron volt relationship [eV] uncertainty=0.000 000 034 e35

kilogram_hartree_relationship

2.061485823E+34

kilogram-hartree relationship [E_h] uncertainty=0.000 000 025 e34

kilogram_hertz_relationship

1.356392512E+50

kilogram-hertz relationship [Hz] uncertainty=0.000 000 017 e50

kilogram_inverse_meter_relationship

4.524438411E+41

kilogram-inverse meter relationship [m^{-1}] uncertainty=0.000 000 056 e41

kilogram_joule_relationship

8.987551787E+16

kilogram-joule relationship [J] uncertainty=(exact)

kilogram_kelvin_relationship

6.5096595E+39

kilogram-kelvin relationship [K] uncertainty=0.000 0037 e39

lattice_parameter_of_silicon

5.431020504E-10

lattice parameter of silicon [m] uncertainty=0.000 0089 e-12

Loschmidt_constant_27315_K_100_kPa

2.6516467E+25

Loschmidt constant (273.15 K, 100 kPa) [m^{-3}] uncertainty=0.000 0015 e25

Loschmidt_constant_27315_K_101325_kPa

2.6867811E+25

Loschmidt constant (273.15 K, 101.325 kPa) [m^{-3}] uncertainty=0.000 0015 e25

mag_constant

0.0000012566370614

mag. constant [N A^{-2}] uncertainty=(exact)

mag_flux_quantum

2.067833831E-15

mag. flux quantum [Wb] uncertainty=0.000 000 013 e-15

molar_gas_constant

8.3144598

molar gas constant [J mol^{-1} K^{-1}] uncertainty=0.000 0048

molar_mass_constant

0.001

molar mass constant [kg mol^{-1}] uncertainty=(exact)

molar_mass_of_carbon_12

0.012

molar mass of carbon-12 [kg mol^{-1}] uncertainty=(exact)

molar_Planck_constant

3.9903127110E-10

molar Planck constant [J s mol^{-1}] uncertainty=0.000 000 0018 e-10

molar_Planck_constant_times_c

0.119626565582

molar Planck constant times c [J m mol^{-1}] uncertainty=0.000 000 000 054

molar_volume_of_ideal_gas_27315_K_100_kPa

0.022710947

molar volume of ideal gas (273.15 K, 100 kPa) [m^3 mol^{-1}] uncertainty=0.000 013 e-3

molar_volume_of_ideal_gas_27315_K_101325_kPa

0.022413962

molar volume of ideal gas (273.15 K, 101.325 kPa) [m^3 mol^{-1}] uncertainty=0.000 013 e-3

molar_volume_of_silicon

0.00001205883214

molar volume of silicon [m^3 mol^{-1}] uncertainty=0.000 000 61 e-6

Mo_x_unit

1.00209952E-13

Mo x unit [m] uncertainty=0.000 000 53 e-13

muon_Compton_wavelength

1.173444111E-14

muon Compton wavelength [m] uncertainty=0.000 000 26 e-15

muon_Compton_wavelength_over_2_pi

1.867594308E-15

muon Compton wavelength over 2 pi [m] uncertainty=0.000 000 042 e-15

muon_electron_mass_ratio

206.7682826

muon-electron mass ratio [] uncertainty=0.000 0046

muon_g_factor

-2.0023318418

muon g factor [] uncertainty=0.000 000 0013

muon_mag_mom

-4.49044826E-26

muon mag. mom. [J T^{-1}] uncertainty=0.000 000 10 e-26

muon_mag_mom_anomaly

0.00116592089

muon mag. mom. anomaly [] uncertainty=0.000 000 63 e-3

muon_mag_mom_to_Bohr_magneton_ratio

-0.00484197048

muon mag. mom. to Bohr magneton ratio [] uncertainty=0.000 000 11 e-3

muon_mag_mom_to_nuclear_magneton_ratio

-8.89059705

muon mag. mom. to nuclear magneton ratio [] uncertainty=0.000 000 20

muon_mass

1.883531594E-28

muon mass [kg] uncertainty=0.000 000 048 e-28

muon_mass_energy_equivalent

1.692833774E-11

muon mass energy equivalent [J] uncertainty=0.000 000 043 e-11

muon_mass_energy_equivalent_in_MeV

105.6583745

muon mass energy equivalent in MeV [MeV] uncertainty=0.000 0024

muon_mass_in_u

0.1134289257

muon mass in u [u] uncertainty=0.000 000 0025

muon_molar_mass

0.0001134289257

muon molar mass [kg mol^{-1}] uncertainty=0.000 000 0025 e-3

muon_neutron_mass_ratio

0.1124545167

muon-neutron mass ratio [] uncertainty=0.000 000 0025

muon_proton_mag_mom_ratio

-3.183345142

muon-proton mag. mom. ratio [] uncertainty=0.000 000 071

muon_proton_mass_ratio

0.1126095262

muon-proton mass ratio [] uncertainty=0.000 000 0025

muon_tau_mass_ratio

0.0594649

muon-tau mass ratio [] uncertainty=0.000 54 e-2

natural_unit_of_action

1.054571800E-34

natural unit of action [J s] uncertainty=0.000 000 013 e-34

natural_unit_of_action_in_eV_s

6.582119514E-16

natural unit of action in eV s [eV s] uncertainty=0.000 000 040 e-16

natural_unit_of_energy

8.18710565E-14

natural unit of energy [J] uncertainty=0.000 000 10 e-14

natural_unit_of_energy_in_MeV

0.5109989461

natural unit of energy in MeV [MeV] uncertainty=0.000 000 0031

natural_unit_of_length

3.8615926764E-13

natural unit of length [m] uncertainty=0.000 000 18 e-15

natural_unit_of_mass

9.10938356E-31

natural unit of mass [kg] uncertainty=0.000 000 11 e-31

natural_unit_of_momum

2.730924488E-22

natural unit of mom.um [kg m s^{-1}] uncertainty=0.000 000 034 e-22

natural_unit_of_momum_in_MeVpc

0.5109989461

natural unit of mom.um in MeV/c [MeV/c] uncertainty=0.000 000 0031

natural_unit_of_time

1.28808866712E-21

natural unit of time [s] uncertainty=0.000 000 000 58 e-21

natural_unit_of_velocity

299792458

natural unit of velocity [m s^{-1}] uncertainty=(exact)

neutron_Compton_wavelength

1.31959090481E-15

neutron Compton wavelength [m] uncertainty=0.000 000 000 88 e-15

neutron_Compton_wavelength_over_2_pi

2.1001941536E-16

neutron Compton wavelength over 2 pi [m] uncertainty=0.000 000 000 14 e-15

neutron_electron_mag_mom_ratio

0.00104066882

neutron-electron mag. mom. ratio [] uncertainty=0.000 000 25 e-3

neutron_electron_mass_ratio

1838.68366158

neutron-electron mass ratio [] uncertainty=0.000 000 90

neutron_g_factor

-3.82608545

neutron g factor [] uncertainty=0.000 000 90

neutron_gyromag_ratio

183247172

neutron gyromag. ratio [s^{-1} T^{-1}] uncertainty=0.000 000 43 e8

neutron_gyromag_ratio_over_2_pi

29.1646933

neutron gyromag. ratio over 2 pi [MHz T^{-1}] uncertainty=0.000 0069

neutron_mag_mom

-9.6623650E-27

neutron mag. mom. [J T^{-1}] uncertainty=0.000 000 23 e-26

neutron_mag_mom_to_Bohr_magneton_ratio

-0.00104187563

neutron mag. mom. to Bohr magneton ratio [] uncertainty=0.000 000 25 e-3

neutron_mag_mom_to_nuclear_magneton_ratio

-1.91304273

neutron mag. mom. to nuclear magneton ratio [] uncertainty=0.000 000 45

neutron_mass

1.674927471E-27

neutron mass [kg] uncertainty=0.000 000 021 e-27

neutron_mass_energy_equivalent

1.505349739E-10

neutron mass energy equivalent [J] uncertainty=0.000 000 019 e-10

neutron_mass_energy_equivalent_in_MeV

939.5654133

neutron mass energy equivalent in MeV [MeV] uncertainty=0.000 0058

neutron_mass_in_u

1.00866491588

neutron mass in u [u] uncertainty=0.000 000 000 49

neutron_molar_mass

0.00100866491588

neutron molar mass [kg mol^{-1}] uncertainty=0.000 000 000 49 e-3

neutron_muon_mass_ratio

8.89248408

neutron-muon mass ratio [] uncertainty=0.000 000 20

neutron_proton_mag_mom_ratio

-0.68497934

neutron-proton mag. mom. ratio [] uncertainty=0.000 000 16

neutron_proton_mass_difference

2.30557377E-30

neutron-proton mass difference [] uncertainty=0.000 000 85 e-30

neutron_proton_mass_difference_energy_equivalent

2.07214637E-13

neutron-proton mass difference energy equivalent [] uncertainty=0.000 000 76 e-13

neutron_proton_mass_difference_energy_equivalent_in_MeV

1.29333205

neutron-proton mass difference energy equivalent in MeV [] uncertainty=0.000 000 48

neutron_proton_mass_difference_in_u

0.00138844900

neutron-proton mass difference in u [] uncertainty=0.000 000 000 51

neutron_proton_mass_ratio

1.00137841898

neutron-proton mass ratio [] uncertainty=0.000 000 000 51

neutron_tau_mass_ratio

0.528790

neutron-tau mass ratio [] uncertainty=0.000 048

neutron_to_shielded_proton_mag_mom_ratio

-0.68499694

neutron to shielded proton mag. mom. ratio [] uncertainty=0.000 000 16

Newtonian_constant_of_gravitation

6.67408E-11

Newtonian constant of gravitation [m^3 kg^{-1} s^{-2}] uncertainty=0.000 31 e-11

Newtonian_constant_of_gravitation_over_h_bar_c

6.70861E-39

Newtonian constant of gravitation over h-bar c [(GeV/c^2)^-2] uncertainty=0.000 31 e-39

nuclear_magneton

5.050783699E-27

nuclear magneton [J T^{-1}] uncertainty=0.000 000 031 e-27

nuclear_magneton_in_eVpT

3.1524512550E-8

nuclear magneton in eV/T [eV T^{-1}] uncertainty=0.000 000 0015 e-8

nuclear_magneton_in_inverse_meters_per_tesla

0.02542623432

nuclear magneton in inverse meters per tesla [m^{-1} T^{-1}] uncertainty=0.000 000 016 e-2

nuclear_magneton_in_KpT

0.00036582690

nuclear magneton in K/T [K T^{-1}] uncertainty=0.000 0021 e-4

nuclear_magneton_in_MHzpT

7.622593285

nuclear magneton in MHz/T [MHz T^{-1}] uncertainty=0.000 000 047

Planck_constant

6.626070040E-34

Planck constant [J s] uncertainty=0.000 000 081 e-34

Planck_constant_in_eV_s

4.135667662E-15

Planck constant in eV s [eV s] uncertainty=0.000 000 025 e-15

Planck_constant_over_2_pi

1.054571800E-34

Planck constant over 2 pi [J s] uncertainty=0.000 000 013 e-34

Planck_constant_over_2_pi_in_eV_s

6.582119514E-16

Planck constant over 2 pi in eV s [eV s] uncertainty=0.000 000 040 e-16

Planck_constant_over_2_pi_times_c_in_MeV_fm

197.3269788

Planck constant over 2 pi times c in MeV fm [MeV fm] uncertainty=0.000 0012

Planck_length

1.616229E-35

Planck length [m] uncertainty=0.000 038 e-35

Planck_mass

2.176470E-8

Planck mass [kg] uncertainty=0.000 051 e-8

Planck_mass_energy_equivalent_in_GeV

1.220910E+19

Planck mass energy equivalent in GeV [GeV] uncertainty=0.000 029 e19

Planck_temperature

1.416808E+32

Planck temperature [K] uncertainty=0.000 033 e32

Planck_time

5.39116E-44

Planck time [s] uncertainty=0.000 13 e-44

proton_charge_to_mass_quotient

95788332.26

proton charge to mass quotient [C kg^{-1}] uncertainty=0.000 000 059 e7

proton_Compton_wavelength

1.32140985396E-15

proton Compton wavelength [m] uncertainty=0.000 000 000 61 e-15

proton_Compton_wavelength_over_2_pi

2.10308910109E-16

proton Compton wavelength over 2 pi [m] uncertainty=0.000 000 000 097 e-15

proton_electron_mass_ratio

1836.15267389

proton-electron mass ratio [] uncertainty=0.000 000 17

proton_g_factor

5.585694702

proton g factor [] uncertainty=0.000 000 017

proton_gyromag_ratio

267522190.0

proton gyromag. ratio [s^{-1} T^{-1}] uncertainty=0.000 000 018 e8

proton_gyromag_ratio_over_2_pi

42.57747892

proton gyromag. ratio over 2 pi [MHz T^{-1}] uncertainty=0.000 000 29

proton_mag_mom

1.4106067873E-26

proton mag. mom. [J T^{-1}] uncertainty=0.000 000 0097 e-26

proton_mag_mom_to_Bohr_magneton_ratio

0.0015210322053

proton mag. mom. to Bohr magneton ratio [] uncertainty=0.000 000 0046 e-3

proton_mag_mom_to_nuclear_magneton_ratio

2.7928473508

proton mag. mom. to nuclear magneton ratio [] uncertainty=0.000 000 0085

proton_mag_shielding_correction

0.000025691

proton mag. shielding correction [] uncertainty=0.011 e-6

proton_mass

1.672621898E-27

proton mass [kg] uncertainty=0.000 000 021 e-27

proton_mass_energy_equivalent

1.503277593E-10

proton mass energy equivalent [J] uncertainty=0.000 000 018 e-10

proton_mass_energy_equivalent_in_MeV

938.2720813

proton mass energy equivalent in MeV [MeV] uncertainty=0.000 0058

proton_mass_in_u

1.007276466879

proton mass in u [u] uncertainty=0.000 000 000 091

proton_molar_mass

0.001007276466879

proton molar mass [kg mol^{-1}] uncertainty=0.000 000 000 091 e-3

proton_muon_mass_ratio

8.88024338

proton-muon mass ratio [] uncertainty=0.000 000 20

proton_neutron_mag_mom_ratio

-1.45989805

proton-neutron mag. mom. ratio [] uncertainty=0.000 000 34

proton_neutron_mass_ratio

0.99862347844

proton-neutron mass ratio [] uncertainty=0.000 000 000 51

proton_rms_charge_radius

8.751E-16

proton rms charge radius [m] uncertainty=0.0061 e-15

proton_tau_mass_ratio

0.528063

proton-tau mass ratio [] uncertainty=0.000 048

quantum_of_circulation

0.00036369475486

quantum of circulation [m^2 s^{-1}] uncertainty=0.000 000 0017 e-4

quantum_of_circulation_times_2

0.00072738950972

quantum of circulation times 2 [m^2 s^{-1}] uncertainty=0.000 000 0033 e-4

Rydberg_constant

10973731.568508

Rydberg constant [m^{-1}] uncertainty=0.000 065

Rydberg_constant_times_c_in_Hz

3.289841960355E+15

Rydberg constant times c in Hz [Hz] uncertainty=0.000 000 000 019 e15

Rydberg_constant_times_hc_in_eV

13.605693009

Rydberg constant times hc in eV [eV] uncertainty=0.000 000 084

Rydberg_constant_times_hc_in_J

2.179872325E-18

Rydberg constant times hc in J [J] uncertainty=0.000 000 027 e-18

Sackur_Tetrode_constant_1_K_100_kPa

-1.1517084

Sackur-Tetrode constant (1 K, 100 kPa) [] uncertainty=0.000 0014

Sackur_Tetrode_constant_1_K_101325_kPa

-1.1648714

Sackur-Tetrode constant (1 K, 101.325 kPa) [] uncertainty=0.000 0014

second_radiation_constant

0.0143877736

second radiation constant [m K] uncertainty=0.000 000 83 e-2

shielded_helion_gyromag_ratio

203789458.5

shielded helion gyromag. ratio [s^{-1} T^{-1}] uncertainty=0.000 000 027 e8

shielded_helion_gyromag_ratio_over_2_pi

32.43409966

shielded helion gyromag. ratio over 2 pi [MHz T^{-1}] uncertainty=0.000 000 43

shielded_helion_mag_mom

-1.074553080E-26

shielded helion mag. mom. [J T^{-1}] uncertainty=0.000 000 014 e-26

shielded_helion_mag_mom_to_Bohr_magneton_ratio

-0.001158671471

shielded helion mag. mom. to Bohr magneton ratio [] uncertainty=0.000 000 014 e-3

shielded_helion_mag_mom_to_nuclear_magneton_ratio

-2.127497720

shielded helion mag. mom. to nuclear magneton ratio [] uncertainty=0.000 000 025

shielded_helion_to_proton_mag_mom_ratio

-0.7617665603

shielded helion to proton mag. mom. ratio [] uncertainty=0.000 000 0092

shielded_helion_to_shielded_proton_mag_mom_ratio

-0.7617861313

shielded helion to shielded proton mag. mom. ratio [] uncertainty=0.000 000 0033

shielded_proton_gyromag_ratio

267515317.1

shielded proton gyromag. ratio [s^{-1} T^{-1}] uncertainty=0.000 000 033 e8

shielded_proton_gyromag_ratio_over_2_pi

42.57638507

shielded proton gyromag. ratio over 2 pi [MHz T^{-1}] uncertainty=0.000 000 53

shielded_proton_mag_mom

1.410570547E-26

shielded proton mag. mom. [J T^{-1}] uncertainty=0.000 000 018 e-26

shielded_proton_mag_mom_to_Bohr_magneton_ratio

0.001520993128

shielded proton mag. mom. to Bohr magneton ratio [] uncertainty=0.000 000 017 e-3

shielded_proton_mag_mom_to_nuclear_magneton_ratio

2.792775600

shielded proton mag. mom. to nuclear magneton ratio [] uncertainty=0.000 000 030

speed_of_light_in_vacuum

299792458

speed of light in vacuum [m s^{-1}] uncertainty=(exact)

standard_acceleration_of_gravity

9.80665

standard acceleration of gravity [m s^{-2}] uncertainty=(exact)

standard_atmosphere

101325

standard atmosphere [Pa] uncertainty=(exact)

standard_state_pressure

100000

standard-state pressure [Pa] uncertainty=(exact)

Stefan_Boltzmann_constant

5.670367E-8

Stefan-Boltzmann constant [W m^{-2} K^{-4}] uncertainty=0.000 013 e-8

tau_Compton_wavelength

6.97787E-16

tau Compton wavelength [m] uncertainty=0.000 063 e-15

tau_Compton_wavelength_over_2_pi

1.11056E-16

tau Compton wavelength over 2 pi [m] uncertainty=0.000 010 e-15

tau_electron_mass_ratio

3477.15

tau-electron mass ratio [] uncertainty=0.31

tau_mass

3.16747E-27

tau mass [kg] uncertainty=0.000 29 e-27

tau_mass_energy_equivalent

2.84678E-10

tau mass energy equivalent [J] uncertainty=0.000 26 e-10

tau_mass_energy_equivalent_in_MeV

1776.82

tau mass energy equivalent in MeV [MeV] uncertainty=0.16

tau_mass_in_u

1.90749

tau mass in u [u] uncertainty=0.000 17

tau_molar_mass

0.00190749

tau molar mass [kg mol^{-1}] uncertainty=0.000 17 e-3

tau_muon_mass_ratio

16.8167

tau-muon mass ratio [] uncertainty=0.0015

tau_neutron_mass_ratio

1.89111

tau-neutron mass ratio [] uncertainty=0.000 17

tau_proton_mass_ratio

1.89372

tau-proton mass ratio [] uncertainty=0.000 17

Thomson_cross_section

6.6524587158E-29

Thomson cross section [m^2] uncertainty=0.000 000 000 91 e-28

triton_electron_mass_ratio

5496.92153588

triton-electron mass ratio [] uncertainty=0.000 000 26

triton_g_factor

5.957924920

triton g factor [] uncertainty=0.000 000 028

triton_mag_mom

1.504609503E-26

triton mag. mom. [J T^{-1}] uncertainty=0.000 000 012 e-26

triton_mag_mom_to_Bohr_magneton_ratio

0.0016223936616

triton mag. mom. to Bohr magneton ratio [] uncertainty=0.000 000 0076 e-3

triton_mag_mom_to_nuclear_magneton_ratio

2.978962460

triton mag. mom. to nuclear magneton ratio [] uncertainty=0.000 000 014

triton_mass

5.007356665E-27

triton mass [kg] uncertainty=0.000 000 062 e-27

triton_mass_energy_equivalent

4.500387735E-10

triton mass energy equivalent [J] uncertainty=0.000 000 055 e-10

triton_mass_energy_equivalent_in_MeV

2808.921112

triton mass energy equivalent in MeV [MeV] uncertainty=0.000 017

triton_mass_in_u

3.01550071632

triton mass in u [u] uncertainty=0.000 000 000 11

triton_molar_mass

0.00301550071632

triton molar mass [kg mol^{-1}] uncertainty=0.000 000 000 11 e-3

triton_proton_mass_ratio

2.99371703348

triton-proton mass ratio [] uncertainty=0.000 000 000 22

unified_atomic_mass_unit

1.660539040E-27

unified atomic mass unit [kg] uncertainty=0.000 000 020 e-27

von_Klitzing_constant

25812.8074555

von Klitzing constant [ohm] uncertainty=0.000 0059

weak_mixing_angle

0.2223

weak mixing angle [] uncertainty=0.0021

Wien_frequency_displacement_law_constant

5.8789238E+10

Wien frequency displacement law constant [Hz K^{-1}] uncertainty=0.000 0034 e10

Wien_wavelength_displacement_law_constant

0.0028977729

Wien wavelength displacement law constant [m K] uncertainty=0.000 0017 e-3

calorie_joule_relationship

4.184

calorie-joule relationship [J] uncertainty=(exact)

h

6.626070040E-34

h [J] The Planck constant (Js)

c

299792458

c [Hz] Speed of light (ms$^{-1}$)

kb

1.38064852E-23

kb [J] The Boltzmann constant (JK$^{-1}$)

R

8.3144598

R [J mol^-1 K^-1] Universal gas constant (JK$^{-1}$mol$^{-1}$)

bohr2angstroms

0.52917721067

bohr2angstroms [AA] Bohr to Angstroms conversion factor

bohr2m

5.2917721067E-11

bohr2m [m] Bohr to meters conversion factor

bohr2cm

5.291772106700E-9

bohr2cm [cm] Bohr to centimeters conversion factor

amu2g

1.660539040000E-24

amu2g [g] Atomic mass units to grams conversion factor

amu2kg

1.660539040E-27

amu2kg [kg] Atomic mass units to kg conversion factor

au2amu

0.000548579909070

au2amu [u] Atomic units (m$@@e$) to atomic mass units conversion factor

hartree2J

4.359744650E-18

hartree2J [J] Hartree to joule conversion factor

hartree2aJ

4.359744650

hartree2aJ [aJ] Hartree to attojoule (10$^{-18}$J) conversion factor

cal2J

4.184

cal2J [J] Calorie to joule conversion factor

dipmom_au2si

8.478353552E-30

dipmom_au2si [C m] Atomic units to SI units (Cm) conversion factor for dipoles

dipmom_au2debye

2.541746451895025916414946904

dipmom_au2debye [???] Atomic units to Debye conversion factor for dipoles

dipmom_debye2si

3.335640951E-30

dipmom_debye2si [???] Debye to SI units (Cm) conversion factor for dipoles

c_au

137.035999139

c_au [] Speed of light in atomic units

hartree2ev

27.21138602

hartree2ev [eV] Hartree to eV conversion factor

hartree2wavenumbers

219474.6313702

hartree2wavenumbers [cm^-1] Hartree to cm$^{-1}$ conversion factor

hartree2kcalmol

627.5094737775374055927342256

hartree2kcalmol [kcal mol^-1] Hartree to kcal mol$^{-1}$ conversion factor

hartree2kJmol

2625.4996382852165050

hartree2kJmol [kJ mol^-1] Hartree to kilojoule mol$^{-1}$ conversion factor

hartree2MHz

6579683920.711

hartree2MHz [MHz] Hartree to MHz conversion factor

kcalmol2wavenumbers

349.7550882318031839256652313

kcalmol2wavenumbers [kcal cm mol^-1] kcal mol$^{-1}$ to cm$^{-1}$ conversion factor

e0

8.854187817E-12

e0 [F m^-1] Vacuum permittivity (Fm$^{-1}$)

na

6.022140857E+23

na [mol^-1] Avogadro’s number

me

9.10938356E-31

me [kg] Electron rest mass (in kg)