– the intergovernmental organization through which Member States act together
     on matters related to measurement science and measurement standards.
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Site map




  • BIPM home page:
  • http://www.bipm.org/en/about-us/
  • BIPM metrology portal:
  • http://search.bipm.org/
  • The BIPM key comparison database:
  • http://kcdb.bipm.org/
  • JCTLM database:
  • http://www.bipm.org/jctlm/
  • BIPM-OIML Resource Center:
  • http://www.metrologyinfo.org/
  • IERS Conventions Center:
  • http://tai.bipm.org/iers/


    Measurement units: the SI
      – Base units
      – SI prefixes
     On the possible future revision of the SI
     Brief history of the SI
    Our publications
     SI Brochure: The International System of Units (SI) [8th edition, 2006; updated in 2014]
     Practical realizations of the definitions of some important units
     BIPM e-News and Core Data
     Director's Reports on the Activity and Management of the BIPM
     Metrologia
     Scientific publications in the open literature
     Guides in Metrology
     Rapports BIPM
    Our services
     Comparisons piloted by the BIPM
     Calibration and measurement services: Traceability to the SI through the BIPM
     International reference time scales
    BIPM Conference Centre
     Calendar of meetings
     BIPM and co-organized workshops
     Miscellaneous BIPM events
     How to get to the BIPM
    News from the BIPM
      – Member States and Associates
      – CIPM MRA
      – Committees
      – Publications
      – Staff and recruitments
      – Metrology events
    25th meeting of the CGPM: 18-20 November 2014