Metrication

Metrication is the conversion of a country's primary system of measurement from an indigenous system to the metric system. So far, the United States of America and Liberia are the only countries that have not officially metricated and thus almost exclusively use their own measurement systems outside of the STEM fields.

Metrication Media

• Metrication by year map.svg

  World map, colour-coded to show the years the countries started the process of official conversion to the metric system. Using data from PhD thesis by Hector Vera and NIST.

• Metric system French adoption decree (1795).jpg

  National Convention decree of April 1795 establishing the metric system

• Fußmaße1.jpg

  Conversion table in an 1848 German schoolbook showing the metric equivalent of the foot in use in over two dozen countries, including several German states

• Baeyer.jpg

  Johann Jacob Baeyer (1794–1885), Offizier im preußischen Generalstab

• Alter Grenzstein Pontebba 01.jpg

  Stone marking the Austro-Hungarian/Italian border at Pontebba displaying myriametres (10 km), a unit used in Central Europe in the 19th century

• Vicopisano-misure antiche.jpg

  Tablet showing conversions of legacy units of weights and measures to metric units, Vicopisano, Tuscany.

• General Carlos Ibáñez e Ibáñez de Ibero.jpg

  Don Carlos Ibáñez e Ibáñez de Ibero, first president of the International Geodetic Association and of the International Committee for Weights and Measures.

• Bulletin de la Soci neuchloise des sciences naturelles (1898-) (20409300876).jpg

  Adolphe Hirsch, secretary of the International Geodetic Association and of the International Committee for Weights and Measures

• Heinrich Wild.jpg

  Heinrich von Wild, president of the International Meteorological Organization and member of the International Committee for Weights and Measures.