Measurements and units

Use metric units of measurement, except in specific cases where imperial units are still used as standard.

miles
yards
feet and inches
pints (for beer, cider and milk)
acres (for land registration)

Write out measurements at first mention, then abbreviate. If it is only mentioned once, do not abbreviate.

12 kilometres per hour (kph)

Abbreviations should not have full stops and are always singular. Use a space between the number and the abbreviation, except with one-letter abbreviations.

Write out “miles” and “metres” in full.

12 kph
9L
10 miles

We are constantly improving based on research and best practice. Any significant changes to our guidance are available on the Updates page.