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FUNDAMENTAL PHYSICAL CONSTANTS

Name Value Unit
absolute zero -273.15 °C
acceleration of free fall 9.806 65 m s-2
atomic mass unit 1.660 538 782(83)×10-27 kg
Avogadro constant 6.022 141 79(30)×1023 mol-1
base of natural logarithms 2.718 281 828 459...  
Bohr magneton 927.400 915(23)×10-26 J T-1
Bohr radius 0.529 177 208 59(36)×10-10 m
Boltzmann constant 1.380 6504(24)×10-23 J K-1
characteristic impedance of vacuum 376.730 313 461... Ω
classical electron radius 2.817 940 2894(58)×10-15 m
Dirac constant 1.054 571 628(53)×10-34 J s
electron mass 9.109 382 15(45)×10-31 kg
electron-proton mass ratio 5.446 170 2177(24)×10-4  
electronvolt 1.602 176 487(40)×10-19 J
elementary charge 1.602 176 487(40)×10-19 C
Euler's number 2.718 281 828 459...  
Faraday constant 96 485.3399(24) C mol-1
Feigenbaum constant 4.669 201 609 102 990...  
Feigenbaum reduction parameter 2.502 907 875 095 892...  
fine-structure constant 7.297 352 5376(50)×10-3  
first radiation constant 3.741 771 18(19)×10-16 W m2
Hartree energy 4.359 743 94(22)×10-18 J
Josephson constant 483 597.891(12)×109 Hz V-1
Loschmidt constant 2.686 7774(47)×1025 m-3
magnetic flux quantum 2.067 833 667(52)×10-15 Wb
molar gas constant 8.314 472(15) J mol-1 K-1
molar Planck constant 3.990 312 6821(57)×10-10 J s mol-1
molar volume (Ideal gas, T = 273.15 K, p = 101.325 kPa) 22.413 996(39)×10-3 m3 mol-1
neutron mass 1.674 927 211(84)×10-27 kg
neutron-proton mass ratio 1.001 378 419 18(46)  
Newtonian constant of gravitation 6.674 28(67)×10-11 m3 kg-1 s-2
nuclear magneton 5.050 783 24(13)×10-27 J T-1
permeability of vacuum 12.566 370 614...×10-7 N A-2
permittivity of vacuum 8.854 187 817...×10-12 F m-1
Pi 3.141 592 653 589 793 238...  
Planck constant 6.626 068 96(33)×10-34 J s
proton mass 1.672 621 637(83)×10-27 kg
reduced Planck constant 1.054 571 628(53)×10-34 J s
Rydberg constant 10 973 731.568 527(73) m-1
second radiation constant 1.438 7752(25)×10-2 m K
solar constant 1366 W m-2
speed of light in vacuum 299 792 458 m s-1
speed of sound in air 331.5 + 0.6 * T/°C m s-1
standard pressure 101 325 Pa
Stefan-Boltzmann constant 5.670 400(40)×10-8 W m-2 K-4

 

Bibliography:

  1. "CODATA Recommended Values of the Fundamental Physical Constants: 2006". NIST Standard Reference Database 121. 1 Oct. 2008. Physical Measurement Laboratory of NIST. 2 Mar. 2011. <http://physics.nist.gov/cuu/Constants/>.