Weights and Measures

Current law

Metric units must be used for all measurements in use for trade. Imperial measurements may be used in addition to metric, as long as they are not more prominent.

Imperial measures (often known as 'supplementary indications') were originally only permitted to remain in use alongside metric until the end of 2009. The EU has now removed the deadline and supplementary indications may remain indefinitely.

This decision was taken by the EU following lobbying from many parties. The two main reasons were to facilitate trade with the USA, and to make allowances for older people who may be more comfortable with imperial units

We will continue to enforce the law in just the same way, offering advice and guidance wherever possible.

Further information on metrication, including official guidance, can be found on the BIS website (Department for Business, Innovation & Skills).