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Physical Constants

The list presented below contains physical constants not specifically related to electricity or magnetism.

* : Reduced Planck constant,  - RF Cafe = h/2π

Visit NIST for all constants, units, and uncertainties.

This is their Extensive Listing of constants

Here is a table of physical units.








NameSymbolValue
Alpha Particle Massmα6.644 656 5 x 10-27  kg
Alpha Particle Molar MassMα4.001 506 179 149 x10-3  kg/mol
Atomic Mass Unitmu1.492 417 90 x 10-10  J
1.660 538 86 x 10-27  kg
7.513 006 608 x 1014  1/m
2.252 342 718 x 1023  Hz
1.080 952 7 x 1013  K
AvogadroN06.022 0 x 1023  molecules/mol
Bohr Radiusa00.529 177 2108 x 10-10  m
Boltzmannk1.380 7 x 10-23  J/K
Deuteron Massmd3.343 583 35 x 10-27  kg
Deuteron Molar MassMd2.013 553 212 70 x 10-3  kg/mol
Electron Rest Massme9.109 382 6 x 10-31  kg
Fine Structureαe2/4·π·ε0· - RF Cafe·c
7.297 352 568 x 10-3
GravitationalG6.672 0 x 10-11  N·m2/kg2
3.449 0 x 10-8  lb·ft2/slug2
Fermi CouplingGF/ - RF Cafe·c1.166 39 x 10-5  1/GeV2
Mass-Energy Ratioc28.987 6 x 1016  J/kg
Muon Magnetic Moment -4.490 447 99 x 10-26  J/T
Muon Massmμ1.883 531 40 x x10-28  kg
Muon Molar MassMμ0.113 428 9264 x 10-3  kg/mol
Planck*h6.626 2 x 10-34  J·s
Planck LengthlP1.616 24 x 10-35  m
Planck MassmP2.176 45x 10-8  kg
Planck TemperatureTP1.416 79 x 1032  K
Planck TimetP5.391 21 x 10-44  s
Proton Rest Massmp1.672 621 71 x 10-27  kg
RydbergR10 973 731.568 525  1/m
3.289 841 960 360 x 1015  Hz
2.179 872 09 x 10-15  J
13.605 6923  eV
Speed of Light (in vacuum)c2.997 9 x 108  m/s
Stefan Boltzmanns5.670 3 x 10-8  W/(m2·K4)
Tau Massmτ3.167 77 x 10-27  kg
Tau Molar MassMτ1.907 68 x 10-3  kg/mol
Thomson Cross Sectionσe0.665 245 873 x 10-28  m2
Unified Atomic Mass 1.660 538 86 x 10-27  kg
Universal GasR8.314 4  J/(mol·K)
Volume of Ideal Gas (@STP)V2.241 4 x 10-2  m3/mol
Weak Mixing AngleθW0.222 15  rad
Wien Displacement Law 2.897 7685 x 10-3  m·K

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About RF Cafe
Kirt Blattenberger - RF Cafe Webmaster
Copyright: 1996 - 2024
Webmaster:
    Kirt Blattenberger,
    BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

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