The inch, yard, mile etc have been defined in terms of metric standards since the 1950s: https://en.wikipedia.org/wiki/International_yard_and_pound https://en.

The inch, yard, mile etc have been defined in terms of metric standards since the 1950s: https://en.wikipedia.org/wiki/International_yard_and_pound https://en.wikipedia.org/wiki/International_yard_and_pound It's sad to see a nation that used to be a driving force in international industry turn its back on international standards.