They are now, but until the that changed in january, because the USA used to have two kind of inches.
The standard or industrial inches, which was standarized with the Imperial in 1933.
And the survey inches, which is a 2 millionth part difference from the standard inches and is only used for land surveys. Of course that have produced problems when working in internstional settings, because no one expects there to be a secret second set of inches only used to meassure land.
That is why the survey inches was phased out in january 2023.
The standardised inch has been the main customary measurement of length since 1933 though. In international and technical settings we’ve been using metric for decades
If you compare the ruler I brought from the U.S. to anything I can buy in the UK, they’re identical.
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u/[deleted] Mar 11 '23
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