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Table from Encarta

Physical Constants
Physical constants, or fundamental constants, are standardized values whose parameters do not change.
Constant Symbol Value in SI units
acceleration of free fall g 9.80665 m s-2
Avogadro's number NA 6.0221367 × 1023 mol-1
Boltzmann constant k 1.380658 × 10-23 J K-1
elementary charge e 1.60217733 × 10-19 C
electronic rest mass me 9.1093897 × 10-31 kg
Faraday's constant F 9.6485309 × 104 C mol-1
gas constant R 8.314510 J K-1 mol-1
gravitational constant G 6.672 × 10-11 N m2 kg-2
Loschmidt's number NL 2.686763 × 1025 m-3
neutron rest mass mn 1.6749286 × 10-27 kg
Planck's constant h 6.6260755 × 10-34 J s
proton rest mass mp 1.6726231 × 10-27 kg
speed of light in a vacuum c 2.99792458 × 108 m s-1
standard atmosphere atm 1.01325 × 105 Pa
Stefan-Boltzmann constant s 5.67051 × 10-8 W m-2 K-4
Appears in these articles:
Constant; Physics
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