Unit Converter
Convert between common units of length, weight, temperature, area, volume, speed and data storage.
How to use the unit converter
- Choose a category, such as Length or Temperature.
- Pick the unit you're converting from and to.
- Enter a value — the result updates as you type.
Features
- Seven categories: length, weight, temperature, area, volume, speed, data storage
- Accurate conversion factors for everyday and metric/imperial units
- Live results, no button to press
Get more reliable conversion results
Unit conversion multiplies or divides by a defined relationship between units. For measurements such as length and mass this is straightforward; temperature requires an offset as well as a scale change.
Keep enough decimal places for the purpose of your calculation, but avoid presenting more precision than the original measurement supports. For engineering, laboratory or regulated work, verify the exact standard and rounding convention required by your field.
For money, medicine or regulated measurements, use a specialist source rather than a general unit converter. Exchange rates and clinical dosing are context-dependent and are intentionally outside this tool’s scope.
Frequently asked questions
Related tools
Units are only useful when the input meaning is clear
A conversion can be mathematically correct but still wrong for the task if the source unit was misread. Pay special attention to similarly named units and to temperature, where conversion is not a simple multiplication.
- Confirm the source unit before entering the value.
- Keep extra precision during calculation and round for presentation at the end.
- For regulated engineering, medical or scientific work, use the precision and standards required by that field.
Related reading: How to use online calculator results responsibly