Table Of Physical Constants


NameSymbolValueUnit
Number $\pi$$\pi$3.14159265358979323846
Number ee2.71828182845904523536
Euler’s constant$\gamma$$\begin{aligned} \gamma &= \lim\limits_{n\rightarrow\infty}\left(\sum\limits_{k=1}^n 1/k-\ln(n)\right) \\ &= 0.5772156649 \end{aligned}$
Elementary charge$e$$1.60217733\cdot10^{-19}$C
Gravitational constant$G,\kappa$$6.67259\cdot10^{-11}$m$^3$kg$^{-1}$s$^{-2}$
Fine-structure constant$\alpha=\frac{e^{2}}{2hc\epsilon_0}$$\approx \frac{1}{137}$
Speed of light in vacuum$c$$2.99792458\cdot10^8$m/s (def)
Permittivity of the vacuum$\varepsilon_0$$8.854187\cdot10^{-12}$F/m
Permeability of the vacuum$\mu_0$$4\pi\cdot10^{-7}$H/m
$(4\pi\varepsilon_0)^{-1}$$8.9876\cdot10^9$Nm$^2$C$^{-2}$
Planck’s constant$h$$6.6260755\cdot10^{-34}$Js
Dirac’s constant$\hbar=\frac{h}{2\pi}$$1.0545727\cdot10^{-34}$Js
Bohr magneton$\mu_{\rm B}=\frac{e\hbar}{2m_{\rm e}}$$9.2741\cdot10^{-24}$Am$^2$
Bohr radius$a_0$$0.52918$
Rydberg’s constant$Ry$13.595eV
Electron Compton wavelength$\lambda_{\rm Ce}=\frac{h}{m_{e} c}$$2.2463\cdot10^{-12}$m
Proton Compton wavelength$\lambda_{\rm Cp}=\frac{h}{m_{\rm p}c}$$1.3214\cdot10^{-15}$m
Reduced mass of the H-atom$\mu_{\rm H}$$9.1045755\cdot10^{-31}$kg
Stefan-Boltzmann’s constant$\sigma$$5.67032\cdot10^{-8}$Wm$^{-2}$K$^{-4}$
Wien’s constant$k_{\rm W}$$2.8978\cdot10^{-3}$mK
Molar gas constant$R$8.31441J$\cdot$mol$^{-1}\cdot$K$^{-1}$
Avogadro’s constant$N_{A}$$6.0221367\cdot10^{23}$mol$^{-1}$
Boltzmann’s constant$k=\frac{R}{N_{A}}$$1.380658\cdot10^{-23}$J/K
Electron mass$m_{\rm e}$$9.1093897\cdot10^{-31}$kg
Proton mass$m_{\rm p}$$1.6726231\cdot10^{-27}$kg
Neutron mass$m_{\rm n}$$1.674954\cdot10^{-27}$kg
Elementary mass unit$m_{u}=\frac{1}{12}m(^{12}_{6}C)$$1.6605656\cdot10^{-27}$kg
Nuclear magneton$\mu_{\rm N}$$5.0508\cdot10^{-27}$J/T
Diameter of the Sun$D_\odot$$1392\cdot10^6$m
Mass of the Sun$M_\odot$$1.989\cdot10^{30}$kg
Rotational period of the Sun$T_\odot$25.38days
Radius of Earth$R_{\rm A}$$6.378\cdot10^6$m
Mass of Earth$M_{\rm A}$$5.976\cdot10^{24}$kg
Rotational period of Earth$T_{\rm A}$23.96hours
Earth orbital periodTropical year365.24219879days
Astronomical unitAU$1.4959787066\cdot10^{11}$m
Light yearlj$9.4605\cdot10^{15}$m
Parsecpc$3.0857\cdot10^{16}$m
Hubble constant$H$$\approx(75\pm25)$km$\cdot$s$^{-1}\cdot$Mpc$^{-1}$

Sharing is caring:
Mini Physics

Administrator of Mini Physics. If you spot any errors or want to suggest improvements, please contact us.

Leave a Comment