– 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 BIPM chairs the DCMAS Network 2016 meeting The 2016 DCMAS Network meeting, hosted at the BIPM, progressed a range of knowledge transfer, capacity building, and training initiatives supporting the DCMAS objectives and helping developing countries and economies around the world. How pure is your folic acid? BIPM qNMR facility supports organic reference material key comparisons Folic acid is the measurand for an organic purity comparison currently being coordinated by the BIPM. Twenty-two NMIs and expert laboratories are taking part and for the first time the BIPM qNMR facility was used in the development and characterization of the comparison material. Standards for monitoring atmospheric carbon dioxide Measurements of the amount fraction of CO2 in air standards, performed with cryogenic trapping, have been achieved at the BIPM. This represents an important milestone towards the establishment of the BIPM CO2-PVT measurement system, which will play a role in the CCQM-K120 key comparison for CO2 in air in 2016. New format for BIPM Circular T Circular T has been launched for 2016 in a new user-friendly format enabling readers to find related files and plots, and to track the calibration of time transfer equipment directly through links to the relevant reports. The BIPM and ILAC sign an updated MoU An updated version of the BIPM-ILAC Memorandum of Understanding (MoU) was signed at the BIPM on 8 March 2016 to reaffirm their cooperation. New BIPM facility for brachytherapy and x-ray imaging A new facility has been designed and built at the BIPM to support the international comparison series in the field of brachytherapy, a radiotherapy treatment in which calibrated radioactive sources are positioned inside the patient.
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.