Unit converters for the measurements that come up most often in daily life. Convert between centimetres and inches, kilograms and pounds (with stone and pounds shown alongside for body weight), Celsius and Fahrenheit, bytes through to terabytes in SI or binary units, millilitres, litres, UK pints and UK gallons, and miles and kilometres. UK defaults are applied where they matter — body weight shows stone and pounds alongside kilograms, and volume uses UK pints (568 ml) rather than US pints. Every conversion works in both directions: type a value on either side and the other updates instantly. All calculations happen in your browser with no data sent elsewhere, and each converter shows the exact conversion factor it uses so you can verify the arithmetic yourself.
Converters
Convert between units in either direction, with sensible UK defaults.
cm to inches Converter
Convert between centimetres and inches in either direction.
Weight Converter
Convert between kilograms, pounds, and stone — with stone and pounds displayed separately for body weight.
Celsius to Fahrenheit Converter
Convert temperatures between Celsius and Fahrenheit in either direction.
Data Storage Converter
Convert between bytes, kilobytes, megabytes, gigabytes and terabytes — choose SI (decimal) or binary units.
Volume Converter
Convert between millilitres, litres, UK pints, UK fluid ounces and UK gallons.
Miles to Kilometres Converter
Convert between miles and kilometres in either direction — using the exact 1.609344 factor.