Physical constants, units and conversion

  • the NIST Reference on Constants, Units, and Uncertainty
  • Fundamental Physical Constants - Non-SI units 1998; CODATA recommended 2002
  • Units on the Web - selection of links at the Uni of Geneve
  • The Versatile Units Converter at the Universite de Geneve
  • Conversion of Units (at Inst. of Chemistry, FU Berlin)
  • The Conversion factors for energy equivalents at NIST
  • Unit Systems in Electromagnetism (Dept. of Electronic Engineering, University of Surrey)