– the intergovernmental organization through which Member States act together
     on matters related to measurement science and measurement standards.
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Revised SI: Download Area
Watch a recording of the open session of the 26th General Conference on Weights and Measures (16 November 2018):

In November 2018 the CGPM approved new definitions for the base units of the SI.

On this page you can download materials developed by the CIPM Task Group for Promotion of the SI – including graphical designs to illustrate the SI, and a "Brand Book" explaining how to use them. Consistent use of these materials helps to raise the profile of the SI and metrology internationally.

Read about the revision of the SI
SI roadmap
26th meeting of the CGPM: 13-16 November 2018
SI posters
Key documents about the revised SI

Social media
Promotional information for general use