Unit Converters

Unit converters: area, speed, pressure, power, volume.

Convert area, speed, pressure, power, volume, and other units. Enter a value and choose source and target units; results update instantly. All conversions run in your browser.

These tools are for converting between units of area, speed, pressure, power, volume, and similar. Useful for engineering, science, driving (e.g. km/h vs mph), or everyday comparisons.

Enter a value and select source and target units; the result updates automatically. All conversions run in your browser and use standard constants (e.g. 1 atm, 1 psi in pascals).

Pick the converter that matches the quantity: area for m²/ft², speed for mph/km/h, pressure for tyre or barometric units, power for kW/hp, volume for litres/gallons. For length, weight, or temperature, see the main “Unit” converters.

Unit Converters tools