Unit Converter
Convert between units of length, weight, area, volume, data size, time, speed and temperature — accurate factors, instant results, and a one-click swap between source and target units.
About this tool
The Unit Converter turns a value from one unit into another across many categories: length, weight, area, volume, data size, time, speed and temperature. Pick a category, choose the source and target units, and the result appears instantly.
It is designed for everyday conversions and for developer-specific ones such as bytes to megabytes or milliseconds to minutes. A swap button flips the source and target so you can convert in the opposite direction without retyping.
How to use
- Choose a category such as Length, Weight, Data size or Temperature.
- Enter the value you want to convert.
- Select the unit you are converting from and the unit you are converting to.
- Read the converted result, updated as you type.
- Use the Swap button to reverse the direction of the conversion.
- Copy the result if you need it elsewhere.
Features
- Eight categories: length, weight, area, volume, data size, time, speed and temperature.
- Accurate conversion factors, including proper temperature formulas rather than simple ratios.
- One-click swap between source and target units.
- Developer-friendly data-size units from bytes up to terabytes.
- Live results that recalculate on every change.
- International unit symbols so the meaning is unambiguous.
Frequently asked questions
Does the converter work offline or send data anywhere?
All calculations run in your browser with fixed factors, so nothing is sent to a server and the tool keeps working even with a poor connection.
How is temperature converted?
Temperature uses the correct formulas — for example Celsius to Fahrenheit multiplies by 9/5 and adds 32 — rather than a single multiplication factor.
Can it convert data sizes like KB, MB and GB?
Yes. The Data size category covers bytes, kilobytes, megabytes, gigabytes and terabytes, which is useful for file and storage calculations.
What does the Swap button do?
It exchanges the from and to units so you can immediately convert in the reverse direction without re-entering anything.
How accurate are the results?
Conversions use standard, well-defined factors. The main limit is floating-point rounding, which only affects far-out decimal places.