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Overview of metrication

Since 1965 the United Kingdom has been adopting metric weights and measures in response to the adoption of metric units as the international system of measurement.

Metric units of measurement are now used for most transactions regulated by the Weights and Measures Act 1985. In addition, it is Government policy to encourage the adoption of the metric system for other purposes, including public administration.

Goods sold loose by weight (mainly fresh foods) from 1 January 2000 are required to be sold in grams and kilograms.

  • Retailers can continue to display the price per imperial unit alongside the price per metric unit.
  • Consumers can continue to express in ounces and pounds the quantity they wish to buy. Retailers will weigh out the equivalent quantity in grams and kilograms.


There are numerous sites on the internet that will help you convert one set of measurements into another. If you are looking for a more comprehensive set of conversions, check out The Calculator site. (Please note, however, that the link to this site does not imply approval or endorsement of the web site by us). 

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Article utilities:  Bookmark and Share Print Print this page Last updated: 23 Mar 2018 at 15:24