Metric and imperial converter
Unit converter for the UK
Convert the measurements UK users actually see side by side: metric units required for most trade and packaging, imperial units still used for road distances, pints, personal height and weight, screens, tyres and imported specifications.
- Convert inches, feet, yards, miles, pints, stone and pounds alongside cm, metres, litres and kg.
- Built for UK contexts such as roads, DIY, recipes, building materials, vehicles and online shopping.
- Plain-English conversion notes for when metric is required and when imperial is still common.
Unit converter
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Temperature
Volume
Speed
Area
Power
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How to convert units in the UK
The UK is unusual because metric and imperial units both remain part of daily life. A useful converter needs to reflect that split instead of assuming every user thinks only in one system.
Where metric is expected
GOV.UK guidance for weights and measures says packaged or loose goods in England, Scotland and Wales must generally be sold using metric measurements such as grams, kilograms, millilitres and litres. Imperial can be displayed alongside metric, but it must not stand out more than the metric measurement.
That makes metric the safe choice for labels, product quantities, most trade documentation, specifications, school work, healthcare and technical records.
Where imperial remains normal
- Road distances and speed: miles and miles per hour.
- Draught beer and cider: pints.
- Personal height and weight: feet, inches, stone and pounds alongside metric.
- DIY and vehicles: inches for screens, tyres, pipes, timber references and imported parts.
- Property and land: square feet often appears alongside square metres, especially in estate listings.
Common UK conversions
- Stone and pounds to kilograms for health, gym and personal weight records.
- Feet and inches to centimetres for height, furniture, rooms and online orders.
- Miles to kilometres and mph to km/h for travel and imported vehicle specs.
- Pints to litres for drink, recipes and catering checks.
- Square feet to square metres for property, flooring, paint and renovation estimates.
Precision and rounding
For shopping and quick comparisons, one or two decimal places is usually enough. For construction, engineering, recipes, medicine, vehicle parts or product labelling, keep more precision and check the tolerance before ordering, cutting or publishing a measurement.
Preguntas frecuentes
Does the UK use metric or imperial units?
Both. Metric is required for many sales and packaging contexts, while imperial remains common for road distances, pints, personal height and weight, property, vehicles and everyday speech.
Can shops show imperial units?
In England, Scotland and Wales, GOV.UK says imperial can be shown alongside metric for packaged or loose goods, but it must not be more prominent than the metric measurement.
Why convert stone to kilograms?
Stone and pounds are still common for personal weight in the UK, but healthcare, fitness apps, travel forms and international records often ask for kilograms.
Which units are most useful for UK property and DIY?
Feet, inches, square feet, metres, centimetres and square metres are all useful because listings, older plans, furniture, flooring and building materials often mix them.
