Unit Converter
Switch between metric, US and UK units for everyday measurements. Type on either side and the other updates.
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- Seven kinds of measurement
- Metric, US and UK units
- Type on either side
How to use the Unit Converter
- Choose what you are measuring.
- Pick the two units.
- Type a number in either box.
Conversions people look up most
| From | To | Multiply by |
|---|---|---|
| Inches | Centimetres | 2.54 |
| Miles | Kilometres | 1.609 |
| Pounds | Kilograms | 0.4536 |
| US gallons | Litres | 3.785 |
| UK gallons | Litres | 4.546 |
For temperature, °F = °C × 9 ÷ 5 + 32. Note that US and UK pints and gallons are different sizes, and that a kilobyte is 1,000 bytes while a kibibyte is 1,024.
Questions about the Unit Converter
Why are there two kinds of gallon?
The US gallon is 3.785 litres and the UK (imperial) gallon is 4.546 litres. Check which one a recipe or fuel figure uses.
How precise are the results?
Conversions use the exact defined factors and are shown to up to ten significant figures.