The list presented below contains physical constants not specifically related to electricity or magnetism.

* : Reduced Planck constant, = h/2π

Visit NIST for all constants, units, and uncertainties.

This is their Extensive Listing of constants

Name	Symbol	Value
Alpha Particle Mass	mα	6.644 656 5 x 10-27  kg
Alpha Particle Molar Mass	Mα	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	α	e2/4·π·ε0··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	mμ	1.883 531 40 x x10-28  kg
Muon Molar Mass	Mμ	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	mτ	3.167 77 x 10-27  kg
Tau Molar Mass	Mτ	1.907 68 x 10-3  kg/mol
Thomson Cross Section	σe	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	θW	0.222 15  rad
Wien Displacement Law		2.897 7685 x 10-3  m·K