Unit Converter
Convert length, weight, temperature, distance, volume, speed, area, time and data instantly — free, in your browser. Pick a category, enter a value, and the result appears as you type. Nothing is uploaded, nothing is logged.
Your result will appear here
Result
How to use
- Pick a unit type — Length, Weight, Temperature, Distance, Volume, Speed, Area, Time or Data.
- Enter a value, then choose the units to convert from and to. The result updates instantly as you type.
- Use Swap units to reverse the conversion, or open one of the dedicated converters below for a single pair with its formula.
Frequently asked questions
Is this unit converter free?
Yes — every conversion on this page is completely free, with no sign-up and no limits. All calculations happen in your browser, so your numbers never leave your device.
How accurate are the conversions?
Results use standard conversion factors: 1 inch is exactly 2.54 cm, 1 foot is exactly 0.3048 m, 1 pound is 0.45359237 kg, and 1 mile is 1.609344 km. Results are rounded to 5 decimal places for readability.
How do I convert temperature?
Temperature is not a simple multiplication. To go from Celsius to Fahrenheit, multiply by 9/5 and add 32 (100 °C = 212 °F). To go back, subtract 32 and multiply by 5/9. Kelvin is Celsius plus 273.15. The converter handles all of this for you.
What is the difference between Length and Distance here?
Length covers small and everyday measurements (millimetres, centimetres, inches, feet, yards), while Distance covers travel-scale units (kilometres, miles, nautical miles). Both use the same standard factors, so either tab gives the same answer for shared units.