Category UK Measurement Law

UK vs US cup measurement explained: a US cup is 236.6 ml, a metric cup 250 ml and the UK has none. Converter, fraction chart and grams per cup.

Compare a UK vs US pint: 568 ml against 473 ml. See the exact difference, a two-way converter, a printable chart and where pints are still legal in the UK.

UK vs US gallon difference explained: a UK gallon is 4.546 litres, a US gallon 3.785 litres. Convert between them, plus mpg, with charts and formulas.

Which imperial units are still legal in the UK? The pint, troy ounce and road-sign miles, plus rules for showing pounds, feet and gallons beside metric.

Pint of beer size in the UK in ml: a pint is 568 ml, the legal measures pubs must use, how much head is allowed and how it compares with a US pint.

Is it legal to sell in pounds and ounces in the UK? What the law allows on labels and price tickets, the exceptions, and the 2023 decision to keep metric.

The Weights and Measures Act 1985 explained: units lawful for trade, short-weight offences, stamped scales, Trading Standards powers and the 2025 reforms.

When did the UK go metric? Key dates from 1965 to 2000, why road signs and pints never changed, and what the law on metric and imperial units says today.

Why does the UK use stone for weight? How the 14 lb stone came from the wool trade, what the law allows today and why Britons still weigh themselves in it.

Why does the UK still use miles? The law, the history and the practical reasons road signs stayed imperial while almost everything else went metric.