List of Set of Constants

Each dataset listed below exports by default only the full long names of the constants. Short aliases are provided for convenience, but they are not exported, to avoid polluting the main namespace with dozens of short-named variables. Users can to import the short names of the variables they use most frequently, as shown in the examples above.

Long nameShortValueUnit
AtomicMassConstantm_u1.66053906892e-27kg
AvogadroConstantN_A6.02214076e23mol^-1
BohrMagnetonμ_B9.2740100657e-24J T^-1
BohrRadiusa_05.29177210544e-11m
BoltzmannConstantk_B1.380649e-23J K^-1
CharacteristicImpedanceOfVacuumZ_0376.730313412Ω
DiracConstantħ1.0545718176461565e-34J s
DiracConstantTimesSpeedOfLightħc3.16152677349669e-26J m
EarthMassM🜨5.9722e24kg
EarthRadiusR🜨6.3781e6m
ElectromagneticFineStructureConstantα0.0072973525643
ElectronMassm_e9.1093837139e-31kg
ElementaryChargee1.602176634e-19C
FermiCouplingConstantG_F1.4365331758849134e-11J^-2
FineStructureConstantα0.0072973525643
GravitationalFineStructureConstantα_G5.906149413805094e-39
MassChargedBosonWeakInteractionm_W1.432707559793125e-25kg
MassChargedPionm_πᶜ2.4880681963975513e-28kg
MassDeltaPlusm_Δ⁺2.19623948744557e-27kg
MassElectronm_e9.1093837139e-31kg
MassGluonm_g0.0kg
MassHiggsBosonm_H2.2318927258781276e-25kg
MassMuonm_μ1.8835316270491198e-28kg
MassNeutralBosonWeakInteractionm_Z⁰1.6255737530940473e-25kg
MassNeutralPionm_π⁰2.406180016631844e-28kg
MassNeutronm_n1.67492750056e-27kg
MassPhotonm_γ0.0kg
MassProtonm_p1.67262192595e-27kg
MassQuarkBottomm_qb7.456874818169496e-27kg
MassQuarkCharmm_qc2.2693286262323135e-27kg
MassQuarkDownm_qd8.37851103165112e-30kg
MassQuarkStrangem_qs1.6667888967220845e-28kg
MassQuarkTopm_qt3.0761614119611e-25kg
MassQuarkUpm_qu3.8505497507162585e-30kg
MassTaum_τ3.1676654483982603e-27kg
MolarGasConstantR8.31446261815324J K^-1 mol^-1
NeutronMassm_n1.67492750056e-27kg
NewtonianConstantOfGravitationG6.6743e-11m^3 kg^-1 s^-2
PlanckConstanth6.62607015e-34J s
PlanckEnergyE_Pl5.413655629189003e9J
PlanckLengthℓ_Pl1.6162550244237053e-35m
PlanckMassm_Pl2.1764343427178984e-8kg
PlanckTimet_Pl5.391246448313604e-44s
ProtonMassm_p1.67262192595e-27kg
ReducedFermiCouplingConstantG_F04.5437957e14J^-2
ReducedPlanckConstantħ1.0545718176461565e-34J s
RydbergConstantR_∞1.0973731568157e7m^-1
SinWeinbergAngleSquaredsinθW²0.2229
SolarMassM☉1.98847e30kg
SolarRadiusR☉6.9566e11m
SpeedOfLightInVacuumc_02.99792458e8m s^-1
StandardAccelerationOfGravitationg_n9.80665m s^-2
StandardAtmosphereatm101325.0Pa
StefanBoltzmannConstantσ5.6703744191844294e-8W K^-4 m^-2
StrongFineStructureConstantα_s0.1183
ThomsonCrossSectionσ_e6.6524587051e-29m^2
VacuumElectricPermittivityε_08.8541878188e-12F m^-1
VacuumMagneticPermeabilityμ_01.25663706127e-6N A^-2
WeinbergAngleθ_W0.49169738195642276
WienFrequencyDisplacementLawConstantb′5.878925757646825e10Hz K^-1
WienWavelengthDisplacementLawConstantb0.0028977719551851727K m
AtomicMassConstantm_u1.66053906892e-27kg
AvogadroConstantN_A6.02214076e23mol^-1
BohrMagnetonμ_B9.2740100657e-24J T^-1
BohrRadiusa_05.29177210544e-11m
BoltzmannConstantk_B1.380649e-23J K^-1
CharacteristicImpedanceOfVacuumZ_0376.730313412Ω
ElectronMassm_e9.1093837139e-31kg
ElementaryChargee1.602176634e-19C
FineStructureConstantα0.0072973525643
MolarGasConstantR8.31446261815324J K^-1 mol^-1
NeutronMassm_n1.67492750056e-27kg
NewtonianConstantOfGravitationG6.6743e-11m^3 kg^-1 s^-2
PlanckConstanth6.62607015e-34J s
ProtonMassm_p1.67262192595e-27kg
ReducedPlanckConstantħ1.0545718176461565e-34J s
RydbergConstantR_∞1.0973731568157e7m^-1
SpeedOfLightInVacuumc_02.99792458e8m s^-1
StandardAccelerationOfGravitationg_n9.80665m s^-2
StandardAtmosphereatm101325.0Pa
StefanBoltzmannConstantσ5.6703744191844294e-8W K^-4 m^-2
ThomsonCrossSectionσ_e6.6524587051e-29m^2
VacuumElectricPermittivityε_08.8541878188e-12F m^-1
VacuumMagneticPermeabilityμ_01.25663706127e-6N A^-2
WienFrequencyDisplacementLawConstantb′5.878925757646825e10Hz K^-1
WienWavelengthDisplacementLawConstantb0.0028977719551851727K m