Constant	Symbol	Value and [Units]
Speed of light	c	2.99792458 x 108 [m/s]
Magnitude of charge of electron	e	1.60217733 x 10-19 [C]
Gravitational constant	G	6.67259 x 10 -11 [N m2/kg2]
Planck's constant	h	6.6260755 x 10-34 [J s]
Boltzmann constant	k	1.380658 x 10-23 [J/K]
Avogadro's number	NA	6.0221367 x 1023 [mol-1]
Gas constant	R	8.314510 [J/mol K]
Mass of electron	me	9.1093897 x 10-31 [kg]
Mass of proton	mp	1.6726231 x 10-27 [kg]
Mass of neutron	mn	1.6749286 x 10-27 [kg]
Permeability of free space	m0	4p x 10-1 [Wb/A m]
Permittivity of free space	e0	8.854187817 x 10-12 [C2/N m2]