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General Constants
The list presented below contains physical constants not specifically related to electricity or magnetism.
* : Reduced Planck constant, = h/2p
Visit NIST for all constants, units, and uncertainties This is their Extensive Listing of constants
Name
Symbol
Value
Alpha Particle Mass
ma
6.644 656 5 x 10-27 kg
Alpha Particle Molar Mass
Ma
4.001 506 179 149 x10-3 kg/mol
Atomic Mass Unit
mu
1.492 417 90 x 10-10 J 1.660 538 86 x 10-27 kg 7.513 006 608 x 1014 1/m 2.252 342 718 x 1023 Hz 1.080 952 7 x 1013 K
Avogadro
N0
6.022 0 x 1023 molecules/mol
Bohr Radius
a0
0.529 177 2108 x 10-10 m
Boltzmann
k
1.380 7 x 10-23 J/K
Deuteron Mass
md
3.343 583 35 x 10-27 kg
Deuteron Molar Mass
Md
2.013 553 212 70 x 10-3 kg/mol
Electron Rest Mass
me
9.109 382 6 x 10-31 kg
Fine Structure
a
e2/4·π·e0··c 7.297 352 568 x 10-3
Gravitational
G
6.672 0 x 10-11 N·m2/kg2 3.449 0 x 10-8 lb·ft2/slug2
Fermi Coupling
GF/·c
1.166 39 x 10-5 1/GeV2
Mass-Energy Ratio
c2
8.987 6 x 1016 J/kg
Muon Magnetic Moment
-4.490 447 99 x 10-26 J/T
Muon Mass
mm
1.883 531 40 x x10-28 kg
Muon Molar Mass
Mm
0.113 428 9264 x 10-3 kg/mol
Planck*
h
6.626 2 x 10-34 J·s
Planck Length
lP
1.616 24 x 10-35 m
Planck Mass
mP
2.176 45x 10-8 kg
Planck Temperature
TP
1.416 79 x 1032 K
Planck Time
tP
5.391 21 x 10-44 s
Proton Rest Mass
mp
1.672 621 71 x 10-27 kg
Rydberg
R¥
10 973 731.568 525 1/m 3.289 841 960 360 x 1015 Hz 2.179 872 09 x 10-15 J 13.605 6923 eV
Speed of Light (in vacuum)
c
2.997 9 x 108 m/s
Stefan Boltzmann
s
5.670 3 x 10-8 W/(m2·K4)
Tau Mass
mt
3.167 77 x 10-27 kg
Tau Molar Mass
Mt
1.907 68 x 10-3 kg/mol
Thomson Cross Section
se
0.665 245 873 x 10-28 m2
Unified Atomic Mass
1.660 538 86 x 10-27 kg
Universal Gas
R
8.314 4 J/(mol·K)
Volume of Ideal Gas (@STP)
V
2.241 4 x 10-2 m3/mol
Weak Mixing Angle
qW
0.222 15 rad
Wien Displacement Law
2.897 7685 x 10-3 m·K
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= h/2p