Unit Converter
Convert between common units of length, weight, temperature, volume, speed and time — instantly and accurately, with no page reloads.
Set up your conversion
Result
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Enter a value to convert.
Conversions use standard international factors and update live as you type.
How to use the Unit Converter
Choose a category such as Length or Temperature, type your value, then pick the unit you are converting from and the unit you want to convert to. The answer appears immediately and the formula line shows exactly what was calculated.
- Length — millimetres to miles, including inches, feet and yards.
- Weight & Volume — grams, kilograms, pounds, litres, gallons and more.
- Temperature — Celsius, Fahrenheit and Kelvin conversions.
Frequently asked questions about unit conversion
How do I convert metric units to imperial?
Multiply the value by the correct conversion factor, for example 1 inch equals 2.54 centimetres and 1 kilogram equals 2.20462 pounds. The converter applies the exact factor for you automatically.
Why is temperature conversion different?
Temperature scales have different zero points, so they need an offset as well as a multiplier. Celsius and Fahrenheit are related by the formula F = C × 9/5 + 32, while 0 °C equals 273.15 K.
Which unit categories does the converter support?
Six categories: length, weight, temperature, volume, speed and time — covering everything from millimetres to miles and from grams to metric tons.