Unit Converter
Convert any common unit.
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About Unit Converter
Unit Converter is a free online tool that instantly converts between units across seven categories: length, weight, temperature, volume, area, speed, and data. Pick a category, choose your 'from' and 'to' units, type a value, and the result updates live with clean, readable formatting.
Everything runs entirely in your browser, so your inputs are never uploaded to a server. There is nothing to install and no sign-up required. Temperature conversions use exact Celsius, Fahrenheit, and Kelvin formulas, while all other categories convert accurately through a shared base unit.
Frequently asked questions
- Is the Unit Converter free to use?
- Yes, it is completely free with no sign-up, downloads, or usage limits.
- Is my data uploaded anywhere?
- No. All conversions happen locally in your browser, so nothing you type is ever sent to a server.
- Which units can I convert?
- You can convert length, weight, temperature, volume, area, speed, and data units, with six to eight common units in each category.
- How accurate are the conversions?
- Conversions use precise standard factors, and temperature uses exact C/F/K formulas, giving results accurate to several decimal places.
- Do I need to click a button to convert?
- No. Results are calculated live as you type or change any unit, so there is no calculate button to press.
- Can I quickly reverse a conversion?
- Yes. Use the Swap units button to instantly switch the 'from' and 'to' units and see the reverse conversion.