Unit Converter
Convert length, weight, temperature, volume, area, speed and data units.
- You entered
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- Conversion
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Convert between any units
This unit converter handles seven categories — length, weight, temperature, volume, area, speed and data. Choose a category and the "from" and "to" menus fill with the right units, so you can convert metric to imperial and back in a click.
How it works
Each unit is stored as a factor of a base unit (for example metres for length), so conversion is a single multiply and divide. Temperature is handled specially because Celsius, Fahrenheit and Kelvin do not share a simple ratio.
How to use the Unit Converter
- Pick a category. Choose length, weight, temperature and so on.
- Enter a value. Type the number you want to convert.
- Choose from and to units. Select the source and target units from the menus.
- Read the result. See the converted value update instantly.
Frequently asked questions
Which categories are supported?
Length, weight, temperature, volume, area, speed and digital data, each with the most common units.
How is temperature handled?
Temperature uses dedicated formulas between Celsius, Fahrenheit and Kelvin rather than a single ratio, so results are exact.
Are US and metric volumes both included?
Volume includes litres and millilitres alongside US gallons, quarts, pints, cups and fluid ounces.
Is my data stored?
No. All conversions run in your browser and nothing is sent to a server.