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Weights and measures - find out the law on trading standards for packaging and selling products

• Units of measurement

  You must use metric measurements (grams, kilograms, millilitres or litres)…

• Specified quantities

  Some goods must be sold in fixed sizes known as ‘specified quantities’.…

• Packaged goods

  Packaged goods are products that are all of these: sold sealed between 5g…

• Equipment and records

  Equipment for packaged goods The equipment you use to weigh or measure…

• Labelling packaged goods

  You must put the weight or volume of your packaged goods on the label. The…

NMO closed in 2015. A few legacy resources are retained below. Other content that was published by NMO is available on the National Archives website.

• Updated: 15 April 2021

How to use data to improve your service: measuring, reporting, analytics tools and techniques.

• Updated: 19 February 2021

• Updated: 27 December 2023

NMRO closed in 2016. Some legacy resources are retained below. Other content that was published by NMRO is available on the National Archives website.

• Updated: 15 April 2021

What packaged goods are, how they are labelled, units of measurements used and compliance with weights and measures regulation.

• Updated: 20 September 2024

How to use a cost utility analysis to evaluate your digital health product.

• Updated: 13 October 2020

Lists for local authorities.

• Updated: 15 January 2021

Now the National Measurement Office.

• Updated: 15 April 2021

Information for businesses.

• Updated: 18 February 2025