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Constants & Units
Interactive reference table for physics constants.
Speed of Light
c
299,792,458
m/s
Gravitational Constant
G
6.67430 × 10⁻¹¹
N·m²/kg²
Planck Constant
h
6.62607 × 10⁻³⁴
J·s
Elementary Charge
e
1.60217 × 10⁻¹⁹
C
Vacuum Permittivity
ε₀
8.85418 × 10⁻¹²
F/m
Avogadro Constant
N_A
6.02214 × 10²³
mol⁻¹
Boltzmann Constant
k_B
1.38064 × 10⁻²³
J/K
Electron Mass
m_e
9.10938 × 10⁻³¹
kg