Moreover the US signed the Convention du mètre [0] in 1878. By law all US custom...

		pouetpouet on Nov 17, 2018 \| parent \| context \| favorite \| on: International System of Units overhauled in histor... Moreover the US signed the Convention du mètre [0] in 1878. By law all US customary units are based on SI units since 1883 [1] [0] https://en.wikipedia.org/wiki/Metre_Convention [1] https://en.wikipedia.org/wiki/Mendenhall_Order