Convert between everyday units
This unit converter turns a value in one unit into its equivalent in another, across the measurement types you use most. It covers both the metric and imperial systems, so switching between kilometres and miles or kilograms and pounds takes a single step.
Categories supported
- Length: millimetres, centimetres, metres, kilometres, inches, feet, yards and miles.
- Weight: milligrams, grams, kilograms, tonnes, ounces, pounds and stone.
- Volume: millilitres, litres, cubic metres, teaspoons, tablespoons, cups, pints and gallons.
- Area: square centimetres, square metres, square kilometres, hectares, square feet and acres.
- Speed: metres per second, kilometres per hour, miles per hour and knots.
- Temperature: Celsius, Fahrenheit and Kelvin.
How to convert
- Choose a category such as Length or Weight.
- Enter the amount and pick the unit you are converting from and to.
- Read the result instantly, or press Swap to reverse the direction.
Why temperature is different
Most units convert with a simple multiplication factor. Temperature scales do not share a zero point, so Celsius, Fahrenheit and Kelvin are converted with their own formulas rather than a single ratio. The converter applies the correct one for you.