– 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:
30 June 2015: The "longest day" in 2015 30 June 2015 will have a supplementary second following the insertion of a positive leap second to Universal Coordinated Time (UTC). First ever live broadcast of a workshop from the BIPM The BIPM's first "webinar" was broadcast on 15 June, live from the BIPM Workshop on Measurement Uncertainty. Celebrating World Metrology Day: Measurements and Light In celebration of World Metrology Day 2015 and the International Year of Light, the BIPM and IOP Publishing are pleased to bring you a collection of recent articles published in Metrologia, highlighting the importance of light across different fields of metrology. NIST donates LEGO® watt balance to the BIPM: "Everything is awesome!" The BIPM has received from NIST a demonstration watt balance made from LEGO, to show visitors the basic features of the much more elaborate laboratory device.
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.

Latest reports and announcements: