NoMoPetrol said:
What amazes me the most about the stubborn refusal of the USA to adopt the system of weights and measures used by virtually every other country on the face of the earth (and certainly by every other industrialized nation) is that we are holding onto the English system of measurements as though we are still emotionally attached to the country we rebelled against in 1776. And even they (the UK) went metric decades ago.
The American version of the English system such as the inch and pound(mass) are all defined in metric units. We kind of use the metric system, only with some funny multipliers added to every unit, and some other silliness all of which mostly just makes the math harder. This is why NASA crashed a Mars probe. The English Imperial system is different than the American English system.
Other countries: Belize still uses Fahrenheit. I think Myanmar is still on English(Imperial) gallon, with both some metric (kg) and some local units thrown in such as the "basket" for rice. The government is converting to metric with a goal of completing in 2019. Liberia was a holdout, not clear what current status is. A few local measurements are still in common use elsewhere but are not legally required, such as the "stone" for human weight in England. Some units are still legal requirements such as the pint for "beer" in England, and such.
Canada is more amusing, while mostly metric, there are TWO pints of beer defined by law. The English pint and the French pint. If you are really thirsty, order in French. Order a "pint of beer" and defined by law you should be served "0.568 litres of beer". Order a "pinte de bière" and you should be served "1.136 litres of beer". Most establishments don't bother with the old units, but sell "mugs of beer" or "chope de bière", or similar, which have no legal definitions. Most young Canadians have no clue exactly what a pint is. French or English. Must be some funny American thing.
My doctor keeps my weight in kg, and my height in cm. All electrical units are metric.
The English might switch back to Imperial units as part of Brexit.
https://www.washingtonpost.com/news/worldviews/wp/2016/08/31/after-brexit-some-brits-want-to-ditch-the-metric-system-too/