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Some Physical Constants listed on Wikipedia

Table of universal constants

Quantity
Symbol Value[8][9] Relative Standard Uncertainty
speed of light in vacuum c \, 299 792 458 m·s−1 defined
Newtonian constant of gravitation G \, 6.67408(31)×10−11 m3·kg−1·s−2 4.7 × 10−5
Planck constant h \, 6.626 070 040(81) × 10−34 J·s 1.2 × 10−8
reduced Planck constant \hbar = h / (2 \pi) 1.054 571 800(13) × 10−34 J·s 1.2 × 10−8

Table of electromagnetic constants

Quantity
Symbol Value[8][10] (SI units) Relative Standard Uncertainty
magnetic constant (vacuum permeability) \mu_0 \, 4π × 10−7 N·A−2 = 1.256 637 061... × 10−6 N·A−2 defined
electric constant (vacuum permittivity) \varepsilon_0 = 1/\mu_0 c^2 \, 8.854 187 817... × 10−12 F·m−1 defined
characteristic impedance of vacuum Z_0 = \mu_0 c \, 376.730 313 461... Ω defined
Coulomb's constant k_{\mathrm{e}} = 1 / 4\pi\varepsilon_0 \, 8.987 551 787... × 109 N·m2·C−2 defined
elementary charge e \, 1.602 176 565(35) × 10−19 C 2.2 × 10−8
Bohr magneton \mu_{\mathrm{B}} = e \hbar / 2 m_\mathrm{e} 9.274 009 68(20) × 10−24 J·T−1 2.2 × 10−8
conductance quantum G_0 = 2 e^2 / h \, 7.748 091 7346(25) × 10−5 S 3.2 × 10−10
inverse conductance quantum G_0^{-1} = h / 2 e^2 \, 12 906.403 7217(42) Ω 3.2 × 10−10
Josephson constant K_{\mathrm{J}} = 2 e / h \, 4.835 978 70(11) × 1014 Hz·V−1 2.2 × 10−8
magnetic flux quantum \phi_0 = h / 2 e \, 2.067 833 758(46) × 10−15 Wb 2.2 × 10−8
nuclear magneton \mu_{\mathrm{N}} = e \hbar / 2 m_\mathrm{p} 5.050 783 53(11) × 10−27 J·T−1 2.2 × 10−8
von Klitzing constant R_{\mathrm{K}} = h / e^2 \, 25 812.807 4434(84) Ω 3.2 × 10−10

Table of atomic and nuclear constants

Quantity
Symbol Value[8][10] (SI units) Relative Standard Uncertainty
Bohr radius a_0 = \alpha / 4 \pi R_\infin \, 5.291 772 1092(17) × 10−11 m 3.2 × 10−9
classical electron radius r_{\mathrm{e}} = e^2 / 4\pi\varepsilon_0 m_\mathrm{e} c^2\, 2.817 940 3267(27) × 10−15 m 9.7 × 10−10
electron mass m_{\mathrm{e}} \, 9.109 382 91(40) × 10−31 kg 4.4 × 10−8
Fermi coupling constant G_{\mathrm{F}} / (\hbar c)^3 1.166 364(5) × 10−5 GeV−2 4.3 × 10−6
fine-structure constant \alpha = \mu_0 e^2 c / 2 h = e^2 / 4 \pi \varepsilon_0 \hbar c \, 7.297 352 5698(24) × 10−3 3.2 × 10−10
Hartree energy E_{\mathrm{h}} = 2 R_\infin h c \, 4.359 744 34(19) × 10−18 J 4.4 × 10−8
proton mass m_{\mathrm{p}} \, 1.672 621 777(74) × 10−27 kg 4.4 × 10−8
quantum of circulation h / 2 m_{\mathrm{e}} \, 3.636 947 5520(24) × 10−4 m2 s−1 6.5 × 10−10
Rydberg constant R_\infin = \alpha^2 m_{\mathrm{e}} c / 2 h \, 10 973 731.568 539(55) m−1 5.0 × 10−12
Thomson cross section (8 \pi / 3)r_{\mathrm{e}}^2 6.652 458 734(13) × 10−29 m2 1.9 × 10−9
weak mixing angle \sin^2 \theta_{\mathrm{W}} = 1 - (m_{\mathrm{W}} / m_{\mathrm{Z}})^2 \, 0.2223(21) 9.5 × 10−3
Efimov factor   22.7  

Table of physico-chemical constants

Quantity
Symbol Value[8][10] (SI units) Relative
Standard
Uncertainty
Atomic mass constant m_{\mathrm{u}} = 1\,\mathrm{u} \, 1.660 538 921(73) × 10−27 kg 4.4 × 10−8
Avogadro's number N_{\mathrm{A}}, L \, 6.022 141 29(27) × 1023 mol−1 4.4 × 10−8
Boltzmann constant k = k_{\mathrm{B}} = R / N_{\mathrm{A}} \, 1.380 6488(13) × 10−23 J·K−1 9.1 × 10−7
Faraday constant F = N_{\mathrm{A}} e \, 96 485.3365(21)C·mol−1 2.2 × 10−8
first radiation constant   c_1 = 2 \pi h c^2 \, 3.741 771 53(17) × 10−16 W·m2 4.4 × 10−8
for spectral radiance c_{\mathrm{1L}} = c_1/\pi \, 1.191 042 869(53) × 10−16 W·m2·sr−1 4.4 × 10−8
Loschmidt constant at T=273.15 K and p=101.325 kPa n_0 = N_{\mathrm{A}} / V_{\mathrm{m}} \, 2.686 7805(24) × 1025 m−3 9.1 × 10−7
gas constant R \, 8.314 4621(75) J·K−1·mol−1 9.1 × 10−7
molar Planck constant N_{\mathrm{A}} h \, 3.990 312 7176(28) × 10−10 J·s·mol−1 7.0 × 10−10
molar volume of an ideal gas at T=273.15 K and p=100 kPa V_{\mathrm{m}} = R T / p \, 2.271 0953(21) × 10−2 m3·mol−1 9.1 × 10−7
at T=273.15 K and p=101.325 kPa 2.241 3968(20) × 10−2 m3·mol−1 9.1 × 10−7
Sackur-Tetrode constant at T=1 K and p=100 kPa S_0 / R = \frac{5}{2}
+ \ln\left[ (2\pi m_{\mathrm{u}} k T / h^2)^{3/2} k T / p \right]		 −1.151 7078(23) 2.0 × 10−6
at T=1 K and p=101.325 kPa −1.164 8708(23) 1.9 × 10−6
second radiation constant c_2 = h c / k \, 1.438 7770(13) × 10−2 m·K 9.1 × 10−7
Stefan–Boltzmann constant \sigma = \pi^2 k^4 / 60 \hbar^3 c^2 5.670 373(21) × 10−8 W·m−2·K−4 3.6 × 10−6
Wien displacement law constant b = h c k^{-1} / \, 4.965 114 231... 2.897 7721(26) × 10−3 m·K 9.1 × 10−7
H0
hubble constant*
 		 69.3
2.25		  
× 10−18		 km/s/Mpc
s−1
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

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