Physical and Mathematical Constants

Bohr Radius a0

5.29177249 x 10^-11 m

Boltzmann Constant, k

1.380 658 x 10^-23 J/K

base of the natural logarithms, e

2.718 281 828 459 05...

elementary (proton) charge, e

1.602 177 x 10^-19 C

electron charge, -e

-1.602 177 x 10^-19 C

electron rest mass, me

9.109 389 7 x 10^-31 kg

electron (charge/mass) ratio, e/me

1.758 820 x 10^11 C/kg

Faraday Constant, F

9.648 531 x 10^4 C/mol

Free space electric constant, epsilon0

8.854 188 x 10^-12 F/m

Free space intrinsic impedance, Z0

376.770 3 Ohms

Free space magnetic constant, μ0

4pi x 10^-7 H/m

Free space speed of electromagnetic waves, c

2.997 924 58 x 10^8 m/s

neutron rest mass, mn

1.674 928 6 x 10^-27 kg

Planck Constant, h

6.626 076 x 10^-34 Js

Pi

3.141 592 653 589 79...

proton rest mass, mp

1.672 623 1 x 10^-27 kg

Newtonian constant of gravitation, G

6.672 59 x 10^-11 m^3 / (kg x s^2 )

Absolute Zero

0 Kelvin = -273.15 Celsius