The Bureau International des Poids et Mesures (BIPM) is the international organization through which Member States work together on matters related to metrology.

The SI is defined by the SI Brochure, published by the BIPM. Prior to the historic vote by the BIPM's Member States on 16 November 2018 to revise the SI, the SI was defined in terms of …

The Final report with new results issued from the continuous BIPM.QM-K1 comparison has recently been published in the KCDB, including the results from CHMU/CHMI (Czechia) in …

The JCGM has taken over responsibility for these two documents from ISO TAG 4, who originally published them under the auspices of the BIPM, IEC, IFCC, ISO, IUPAC, IUPAP and OIML.

Follow along as Professor Willie E. May speaks to the BIPM about the transformative growth of chemical and biological metrology and its role in addressing the challenges of our time.

CIPM Mutual Recognition Arrangement (CIPM MRA) The CIPM Mutual Recognition Arrangement (CIPM MRA) is the framework through which National Metrology Institutes demonstrate the …

JCGM Publications: Guides in Metrology In order to benefit fully from the hyperlinking between the documents, the reader is advised to download all JCGM documents presently available in one …

UNESCO Livestream: World Metrology Day Symposium (20 May) Watch video on YouTube Error 153 Video player configuration error BIPM Director's Message: Past, Present and Future …

Le Bureau international des poids et mesures (BIPM) est l'organisation intergouvernementale dont les États Membres agissent en commun en ce qui concerne les sujets liés à la métrologie.

A look back at the ten most-read BIPM news stories of 2025, highlighting the milestones, collaborations and scientific achievements that shaped a landmark year for international …