– 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:
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. Workshop highlights future challenges for measurements of aerosols Representatives from the atmospheric monitoring community (WMO), an automobile manufacturer (BMW) and regulators (OECD and US-EPA) presented their perspectives on the needs for measurements of aerosols at a workshop organized by the Gas Analysis Working Group of the CCQM at the BIPM on 15 April. Publication of new ozone cross-section measurements for the accurate monitoring of air quality New measurements of the ozone cross section carried out in the BIPM laboratories have been published with a relative standard uncertainty of 0.43 %, the smallest to date. Adoption of these new values would resolve differences between reference methods for surface ozone measurements. IPPP: a new technique to improve clock frequency comparisons A joint project between the BIPM, CNES and CLS has developed and tested the IPPP (PPP with integer ambiguity resolution) technique which will lead to a significant improvement in clock frequency comparisons using GPS signals.
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: