Unit Converter

About the Unit Converter

Recipes, building plans, shipping forms and school work all mix measurement systems, and a wrong conversion can be costly. This converter covers six families of units, using standard conversion factors and showing the result to a sensible number of decimal places.

Temperature is handled as a proper formula rather than a simple ratio, because Celsius, Fahrenheit and Kelvin have different zero points.

How to use the Unit Converter

1. 1Choose a measurement category such as length or weight.
2. 2Pick the unit you are converting from and the unit you want.
3. 3Type your value; the result appears immediately.
4. 4Use the swap control to reverse the conversion.

Features

• Length, weight, temperature, area, volume and speed
• Metric, imperial and US customary units
• Correct temperature formulas rather than ratios
• Instant swap between source and target
• Copyable result with adaptive precision

Why people use it

• Follow a recipe or plan written in another system.
• Complete shipping or customs forms accurately.
• Check a supplier's figures against your own units.

Common use cases

• Turning a recipe in cups and Fahrenheit into millilitres and Celsius.
• Converting a room measured in feet into metres for a floor plan.
• Checking a parcel weight given in pounds against a kilogram limit.

Privacy and your data

Everything you type or open here is processed by your own browser. No file, text or result is uploaded to a server, stored in a database or shared with anyone, and closing the tab clears it completely.

Frequently asked questions

Related tools