Pi

π

3.141 592 653 59

Speed of light in vacuum

c

2.997 924 58

•10⁸

m/s

Elementary charge

e

1.602 176 6208(98)

•10^–19

C

Electron volt

eV

1.062 176 6208(98)

•10^–19

J

Planck constant

h

6.626 070 040(81)

•10^–34

J•s

ħ = h/2π

1.054 571 800(13)

•10^–34

J•s

Electric constant

ε₀ = 1/(μc²)

8.854 187 817

•10^–12

A•s/(V•m)

Fine structure constant

α

7.297 352 5664(17)

•10^–3

Magnetic flux quantum

Φ₀

2.067 833 831(13)

•10^–15

Wb (Weber)

Magnetic constant

μ₀

4π

•10^–7

V•s/(A•m)

Gravitational constant

G

6.674 08(31)

•10^–11

N•m²/kg²

gravitational acceleration

g

9.806 65

m/s²

Conductance quantum

G₀

7.748 091 7310(18)

•10^–5

S (Siemens)

Faraday constant

F

96 485.332 89(59)

C/mol

Absolute zero point of temperature

T₀

–273.15 °C = 0 K

Normal pressure and normal
temperature

T_n = 273.15 K, p_n = 100 000 Pa

Molar Volume of the ideal Gas at T_n and p_n)

V_m

22.413 962(13)

•10^–3

m³/mol

Stefan-Boltzmann constant

σ

5.670 367(13)

•10^–8

W/(m²•K⁴)

Avogadro constant

N_A

6.022 140 857(74)

•10²³

mol^–1

molar gas constant

R

8.314 4598(48)

J/(mol•K)

Boltzmann constant

k = R/N_A

1.380 648 52(79)

•10^–23

J/K

Wien wavelength displacement law constant

b

2.897 7685(51)

•10^–3

K•m

Solar constant

S

1.366(30)

•10³

W/m²

Rydberg constant (Hydrogen atom)

R_H

10 967 758.340 63(10)

m^–1

Rydberg constant (infinite core masses)

R_∞

10 973 731.568 508(65)

m^–1

Atomic mass unit

1 u

1.660 539 040(20)

•10^–27

kg

Mass of proton

m_p

1.672 621 898(21)

•10^–27

kg

1.007 276 466 879(91)

U

Mass of electron

m_e

9.109 383 56(11)

•10^–31

kg

0.510 998 9461(31)

U

Mass of neutron

m_n

1.674 927 471(21)

•10^–27

kg

1.008 664 915 88(49)

U