– the intergovernmental organization through which Member States act together
     on matters related to measurement science and measurement standards.
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About the BIPM
Metrology area:
Acoustics, Ultrasound and Vibration
Chemistry and Biology
Electricity and Magnetism
Ionizing Radiation
Mass and related quantities
Photometry and Radiometry
Time and Frequency

BIPM News:
Further countries to benefit from the BIPM's Capacity Building project on "Metrology for Clean Air" Visiting scientists from NPLI (India) and NMISA (South Africa) will be participating in the BIPM's "Metrology for Clean Air" CBKT project in 2017 and 2018, following receipt of additional sponsorship. CCM Pilot Study of future realizations of the kilogram The CCM has carried out a pilot comparison of mass calibrations based on methods that will be used to realize the kilogram after its redefinition. Metrology in support of the 2030 Agenda for Sustainable Development A new brochure "The role of metrology in the context of the 2030 Sustainable Development Goals" has been jointly developed by UNIDO, the BIPM and the OIML. Happy World Metrology Day! 20 May 2017 The theme for 2017 is Measurements for transport. We invite you to download the promotional poster and other material from the World Metrology Day website, and to browse the many events being organized around the world to celebrate the day. New President of the CCPR takes office Dr Maria Luisa Rastello, INRIM (Italy) and CIPM Member, has officially taken over the Presidency of the CCPR from Dr Takashi Usuda, NMIJ AIST (Japan). Standards to differentiate CO2 emission sources in the atmosphere Standards and methods to calibrate instruments that measure isotope ratios of carbon dioxide in air and operate in the infra-red, have been described in a recent publication in Analytical Chemistry. Support for regional key comparison of Zener voltage standards The Physical Metrology Department has set up a project to provide support for the organization of one of GULFMET's first key comparisons - GULFMET.EM.BIPM-K11 - a comparison of Zener voltage standards.
Latest reports and announcements:

The BIPM's mission and role:

The mission of the BIPM is to ensure and promote the global comparability of measurements, including providing a coherent international system of units for:

  • Scientific discovery and innovation,
  • Industrial manufacturing and international trade,
  • Sustaining the quality of life and the global environment.

The unique role of the BIPM enables it to achieve its mission by developing the technical and organizational infrastructure of the International System of Units (SI) as the basis for the world-wide traceability of measurement results. This is achieved both through technical activities in its laboratories and through international coordination.