Free Unit Converter
Convert length, weight, temperature, and volume between common units instantly.
How to use this tool
Choose a category using the tabs above: Length, Weight, Temperature, or Volume. Select the unit you are converting from and the unit you want to convert to, then type a value in the “From” field.
The converted result appears instantly in the “To” field as you type — there is no button to press. Use the swap icon between the two fields to flip the units and convert in the other direction.
This tool is useful for cooking with recipes that use different measurement systems, converting temperatures for travel or weather, and everyday length or weight conversions between metric and imperial units.
FAQ
- What unit categories are supported?
- Length, weight, temperature, and volume, each with the most commonly used units, such as meters, kilograms, Celsius/Fahrenheit, and liters.
- How do I convert between two units?
- Pick a category tab, choose the 'from' and 'to' units from the dropdowns, then type a value. The converted result updates instantly, with no need to press a button.
- What does the swap button do?
- The swap icon between the two unit dropdowns instantly flips the 'from' and 'to' units, so you can quickly convert in the opposite direction.
- Is the conversion accurate?
- Yes. Conversions use standard conversion factors (and the standard Celsius/Fahrenheit/Kelvin formulas for temperature), rounded to six decimal places.