– the intergovernmental organization through which Member States act together
     on matters related to measurement science and measurement standards.
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The original signatories

Following its preparation by the International Metre Commission, the Metre Convention was signed on 20 May 1875 by representatives of the following seventeen States:
    Argentina; Austria-Hungary; Belgium; Brazil; Denmark; France; Germany; Italy; Peru; Portugal; Russia; Spain; Sweden and Norway; Switzerland; Turkey; United States of America; Venezuela.

For the list of current Member States, click here.

The anniversary of the signing, 20 May, is now known as World Metrology Day.

Notice of Contributions
The original signatories
Procedure for a State to become a Member of the BIPM
Official texts
BIPM Compendium
Procedure for a State to become a Member of the BIPM
Notice of Contributions
CIPM publications
Calculating Member State contributions
Related articles
International Metre Commission