– 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:
The role of fundamental constants and redefining the SI Celebrating the work accomplished towards the proposed redefinition of the International System of Units (SI) in terms of physical constants, the BIPM organized a scientific symposium on 7 September 2017 under the auspices of the Consultative Committee for Units (CCU). First time transfer experiment with BeiDou satellites over multiple baselines The installation of two BeiDou time and frequency transfer systems at the BIPM has allowed the establishment of the first long-distance baseline for clock comparison between the NIM and the BIPM with BeiDou satellites . Agreement with the CEA List gives the BIPM access to the DOSEO platform for high-energy photon beams An agreement between the BIPM and the CEA List will allow the BIPM to operate the ongoing BIPM.RI(I)-K6 comparison for high-energy photon beams at the DOSEO platform for R&D in radiotherapy and imaging technologies. 50th anniversary of the adoption of the atomic definition of the second On 13 October 1967, the CGPM took the decision to adopt a new definition of the unit of time, the second, based on an atomic transition. The CCTF commemorated the 50th anniversary of this fundamental decision at its meeting in June 2017.
Latest reports and announcements:

The BIPM's mission and role:

  • Our vision is to be universally recognized as the world focus for the international system of measurement.

  • Our mission is to work with the NMIs of our Member States, the RMOs and strategic partners world-wide and to use the BIPM's international and impartial status to promote and advance the global comparability of measurements.