The US does NOT use imperial

Okay. Measurements. United States. Imperial. You do not use imperial. We use inches, feet... Your gallon is wrong. Our gallon is 231 cubic inches. What's the difference between them? Ours is a fifth bigger. Says who? The Weights and Measures Act of 1824. We left in 1776. Hold on, so imperial was defined... In 1824, 50 years after the U.S. declared independence? Roughly, yeah. Then what's the U.S. using? Britain's the original. We kept it. What about other units, like a pint? Our pint is 20 fluid ounces. Ours is 16. So the American pint's smaller? But our fluid ounce is bigger. Does anything match? The mile? The mile is fine. UK. You know a lot about these measurements, you use imperial, too, then? Officially, we converted to metric in 1965. So your road signs are in kilometres, right? Miles. Your beer? Pints. By law. It's illegal to sell draft beer in litres. Petrol? That's in litres, finally. And we measure its use in miles per gallon. So what do you actually use metric for? Food, weather, medicine, science. So metric for everything except roads, beer, and fuel economy. Mmm hmm. Fine. U.S., your system is intact. The old units preserved faithfully. Okay. And how is the inch defined? Legally? Yeah. 2.54 centimetres. Centimetres? Mmm hmm. Since 1959. And the pound? 453.59237 grams. So American units are defined in metric? The units are in metric. The labels are ours. The U.S. is a metric country? Shh! We are metric in secret.