Weights and measures: the law
1. Units of measurement
You must use metric measurements (grams, kilograms, millilitres or litres) when selling packaged or loose goods in England, Scotland or Wales.
There are different rules in Northern Ireland.
The only products you can sell in imperial measures are:
- draught beer or cider by pint
- milk in returnable containers by pint
- precious metals by troy ounce
You can display an imperial measurement alongside the metric measurement but it can’t stand out more than the metric measurement.