Search facility:  
BIPM Home | Site map | Metrologia | KCDB | JCTLM-DB | Contact us  
   
Unit conversions
Summary
Frequently asked questions about the international prototype of the kilogram
What time is it?
BIPM staff directory
Unit conversions
How to get to the BIPM headquarters
Disclaimer, copyright and permissions
Transits of Venus across the solar disk
What is metrology?
Direct access

Official values of conversion factors
  • can be found in the multi-part international standard ISO/IEC 80000, which can be purchased from the usual ISO and IEC outlets;
  • may also be consulted on-line in Appendix B of NIST Special Publication 811.

  • The CODATA internationally recommended values for the fundamental physical constants are available from the NIST site.

    Several on-line unit conversion facilities exist, and links to a number of these are provided by the NIST. The BIPM has no plans to develop its own on-line conversion programs.