The International Bureau of Weights and Measures is the English name of the Bureau international des poids et mesures (BIPM, often written in English Bureau International des Poids et Mesures), a standards organisation, one of the three organizations established to maintain the International System of Units (SI) under the terms of the Convention du Mètre (Metre Convention). Note that the abbreviation IBWM is not used.

It is based at the Pavillon de Breteuil in Sèvres, France, where it enjoys extraterritorial status. As such it escaped German occupation during World War II.

According to its official site:

The task of the BIPM is to ensure world-wide uniformity of measurements and their traceability to the International System of Units (SI).

It does this with the authority of the Convention du Mètre, a diplomatic treaty between fifty-one nations (as of 2005), and it operates through a series of Consultative Committees, whose members are the national metrology laboratories of the Member States of the Convention, and through its own laboratory work.

The BIPM carries out measurement-related research. It takes part in, and organises, international comparisons of national measurement standards, and it carries out calibrations for Member States.

The other organisations which maintain the SI system are:

• the General Conference on Weights and Measures (CGPM, Conférence générale des poids et mesures)
• the International Committee for Weights and Measures (CIPM, Comité international des poids et mesures)

External links

• BIPM

Standards organizations | Metrology | International organizations

Burev Etrebroadel ar Pouezioù hag ar Muzulioù | Международно бюро за мерки и теглилки | Internationales Büro für Maß und Gewicht | Oficina Internacional de Pesos y Medidas | Bureau international des poids et mesures | Bureau International des Poids et Mesures | Bureau International des Poids et Mesures | 国際度量衡局 | Museu Internacional de Pesos e Medidas | Међународни биро за тежине и мере | Međunarodni biro za težine i mere | BIPM