Treaty

International Convention amending the Convention concluded at Paris on 20 May 1875 ensuring the international unification and perfection of the metric system and the Regulations annexed to that Convention

PartiesParties with a link have a reservation.

Party Signature RatificationS=Signature without reservation or requirement of ratification R=Ratification, Acceptance, Approval or Notification A=Accession Su=Succession NK=Not Known Entry into force Renunciation Termination
Argentina 06-10-1921
Australia 27-11-1947 (A) 27-11-1947
Austria 06-10-1921 15-12-1926 (R) 15-12-1926
Belarus 13-01-2020 (A) 13-01-2020
Belgium 06-10-1921 28-07-1923 (R) 28-07-1923
Brazil 14-04-1954 (A) 14-04-1954
Bulgaria 06-10-1921 27-08-1925 (R) 27-08-1925
Cameroon 07-10-1970 (A) 07-10-1970
Canada 06-10-1921 21-02-1923 (R) 21-02-1923
Chile 06-10-1921
China 20-05-1977 (A) 20-05-1977
Colombia 06-02-2013 (A) 06-02-2013
Costa Rica 05-09-2022 (R) 05-09-2022
Croatia 23-12-2008 (A) 23-12-2008
Czech Republic 13-01-1993 (A) 13-01-1993
Czechoslovakia (<01-01-1993) 21-06-1922 (A) 21-06-1922
Democratic People's Republic of Korea 07-05-1982 (A) 07-05-1982
Denmark 06-10-1921 10-02-1923 (R) 10-02-1923
Ecuador 06-08-2019 (A) 06-08-2019
Egypt 02-11-1962 (A) 02-11-1962
Finland 06-10-1921 31-08-1923 (R) 31-08-1923
France 06-10-1921 01-08-1928 (R) 01-08-1928
Germany 06-10-1921 30-01-1928 (R) 30-01-1928
Greece 19-03-2001 (A) 19-03-2001
Hungary 06-10-1921 14-08-1925 (R) 14-08-1925
India 11-01-1957 (A) 11-01-1957
Indonesia 30-09-1960 (A) 30-09-1960
Iran 25-02-1975 (A) 25-02-1975
Iraq 20-08-2013 (A) 20-08-2013
Ireland 29-10-1925 (A) 29-10-1925
Israel 07-05-1985 (A) 07-05-1985
Italy 06-10-1921 07-08-1924 (R) 07-08-1924
Japan 06-10-1921 30-12-1926 (R) 30-12-1926
Kenya 01-01-2010 (A) 01-01-2010
Lithuania 16-04-2015 (A) 16-04-2015
Malaysia 03-09-2001 (A) 03-09-2001
Mexico 06-10-1921 15-04-1927 (R) 15-04-1927
Montenegro 24-01-2018 (A) 24-01-2018
Morocco 24-05-2019 (A) 24-05-2019
Netherlands, the Kingdom of the 01-01-1929 (A) 01-01-1929
New Zealand 29-05-1991 (A) 29-05-1991
Norway 06-10-1921 03-08-1923 (R) 03-08-1923
Pakistan 12-07-1973 (A) 12-07-1973
Peru 26-07-1937 (R) 26-07-1937
Poland 12-05-1925 (A) 12-05-1925
Portugal 06-10-1921 17-06-1926 (R) 17-06-1926
Republic of Korea, the 28-07-1959 (A) 28-07-1959
Romania 06-10-1921 11-02-1926 (R) 11-02-1926
Russian Federation 12-08-1925 (A) 12-08-1925
Saudi Arabia 11-02-2011 (A) 11-02-2011
Serbia 09-04-2001 (A) 09-04-2001
Singapore 20-06-1994 (A) 20-06-1994
Slovakia 13-01-1993 (A) 13-01-1993
Slovenia 23-03-2016 (A) 23-03-2016
South Africa 31-07-1964 (A) 31-07-1964
Spain 06-10-1921 31-12-1926 (R) 31-12-1926
Sweden 06-10-1921 16-02-1923 (R) 16-02-1923
Switzerland 06-10-1921 05-02-1923 (R) 05-02-1923
Thailand 06-10-1921 25-11-1950 (R) 25-11-1950
Türkiye 01-01-1933 (A) 01-01-1933
Ukraine 07-08-2018 (A) 07-08-2018
United Arab Emirates 27-04-2015 (A) 27-04-2015
United Kingdom 06-10-1921 21-02-1923 (R) 21-02-1923
United States of America 06-10-1921 24-10-1923 (R) 24-10-1923
Uruguay 06-10-1921 02-12-1925 (R) 02-12-1925
Venezuela 18-11-1960 (A) 18-11-1960 14-11-2018
Yugoslavia (< 25-06-1991) 10-11-1929 (R) 10-11-1929
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