keepingquiet
I think we've shown in this country how to two methods can sit side by side.
I just wish when we enter our weight they would stick to either metric or stones. I hate it when they ask for pounds- is that American pounds or British pounds?
American pound weights are the same as British pound weights. However American don't use stones as a measure of weight so a ten stone person in Britain will be a 140lb one in America.
American volume measures are tricky. The American pint is 16 American fluid ounces and the British pint is 20 British fluid ounces. I understand this dates from the eighteenth century or possibly earlier, when there were two types of gallon, the wine gallon, and the beer gallon (which was 25% larger). A pint is one eighth of a gallon. America standardised in the wine gallon and the wine pint, Britain standardised on beer.
American fluid ounces are very slightly bigger than British fluid ounces, though can be treated as equal for most normal purposes. This is again the result of standardising on wine, an ounce of wine takes up more room than an ounce of beer because wine has more alcohol in it, which is less dense than water.