🔒 Calculated in your browser – nothing is sent
Unit Converter
Unit Converter: free, accurate and easy to use. Results update instantly in your browser, with no sign-up.
How to use
Convert between common units of length, weight, temperature, volume, area and speed instantly. Pick a category, enter a value and choose the units to convert from and to.
- Enter your numbers.
- Results update instantly as you type.
- Adjust the values to compare scenarios.
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Frequently asked questions
How many centimetres are in an inch?
One inch equals exactly 2.54 centimetres.
How do I convert Celsius to Fahrenheit?
Multiply the Celsius value by 9/5 and add 32.
Is it free?
Yes. All calculators are free, with no sign-up and no limits.
Is my data stored?
No. Calculations run in your browser and nothing you enter is sent or stored.
How accurate are the results?
Calculations use standard formulas. Results are estimates for general information; for important decisions, confirm with a professional or your provider.