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Common Constants in Physics

Identifier Value Units Description
uc_AtomicMass 1.6605387310-27 kg atomic mass constant
uc_AtomicMass_Energy 1.4924177810-10 J atomic mass constant energy equivalent
uc_Bar 1105 kg m-1 s-2 bar (pressure)
uc_Barn 110-28 m2 barn (cross section)
uc_Boltzmann 1.380650310-23 J K-1 Boltzmann constant k
uc_Boltzmann_eVK 8.61734210-5 eV K-1 Boltzmann constant k in eV/K
uc_Curie 3.71010 s-1 Curie
uc_Dyne 110-5 kg m s-2 dyne
uc_Erg 110-7 kg m2 s-2 erg
uc_Gauss 110-4 kg a-1 s-2 Gauss
uc_GramForce 9.8066510-3 kg m s-2 gram (force)
uc_InchMercury 3.38638815789103 kg m-1 s-2 inch mercury
uc_InchWater 2.490889102 kg m-1 s-2 inch water
uc_Joule 1100 kg m2 s-2 Joule
uc_Lambert 1104 cd sr m-2 Lambert
uc_Lumen 1100 cd sr lumen
uc_Lux 1100 cd sr m-2 lux
uc_MassElectron 9.1093818810-31 kg mass of electron
uc_MassMuon 1.8835310910-28 kg mass of muon
uc_MassNeutron 1.6749271610-27 kg mass of neutron
uc_MassProton 1.6726215810-27 kg mass of proton
uc_Newton 1100 kg m s-2 Newton (force)
uc_Phot 1104 cd sr m-2 phot
uc_PlanckH 6.6260687610-34 J s Planck constant h
uc_PlanckH_eVs 4.1356672710-15 eV s Planck constant h in eV s
uc_PlanckHBar 1.05457159610-34 J s Planck constant h/2Pi
uc_PlanckHBar_eVs 6.5821188910-16 eV s Planck constant h/2Pi in eV s
uc_PlanckLength 1.616010-35 m Planck length
uc_PlanckMass 2.176710-8 kg Planck mass
uc_PlanckTime 5.390610-44 s Planck time
uc_SpeedLight 2.99792458108 m s-1 speed of light in vacuum
uc_Poise 110-1 kg m-1 s-1 Poise
uc_ProtonMagneticMoment 1.41060663310-26 A m2 magnetic moment of a proton
uc_Rad 110-2 m2 s-2 rad
uc_Roentgen 2.5810-4 a s kg-1 Roentgen
uc_Stilb 1104 cd m-2 stilb
uc_Stokes 110-4 m2 s-1 Stokes
uc_Torr 1.33322368421102 kg m-1 s-2 Torr

Last Update: 2012-Oct-20