Conversion Calculator
One converter for every unit.
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About the Conversion Calculator
A single universal conversion calculator for every common unit. Pick a category — length, weight, area, volume, speed, time, data, or temperature — choose the unit you have and the unit you want, and get an instant, accurate result. It rolls all the everyday converters (cm to inches, kg to lbs, Celsius to Fahrenheit, mph to km/h, GB to MB, and more) into one fast, free tool.
How to use the Conversion Calculator
- 01Pick a category (length, weight, temperature, …).
- 02Choose the 'from' and 'to' units and enter a value.
- 03Read the converted result and copy it.
Frequently asked questions
What can this conversion calculator convert?
Length, weight/mass, area, volume, speed, time, digital data, and temperature — pick a category, then convert between any two of its units.
Is it accurate?
Yes — it uses exact conversion factors (and the correct °C/°F/K formulas for temperature), so results match official definitions.
Do I need to install anything?
No. It runs entirely in your browser with nothing to download — just sign in free.