What this calculator does
Unit conversion is a daily need: recipes, travel, technical specifications and data plans all use different measures. A fast converter removes the guesswork.
This tool supports length, weight, temperature, area, volume, speed and data units. Everything runs in your browser, with no sign-up and no upload.
Conversion formula
Result = value × source factor ÷ target factor Each unit is converted through a common base unit. Temperature uses dedicated formulas for Celsius, Fahrenheit and Kelvin.
How this calculator works
- 01
Pick a category
Choose length, weight, temperature, area, volume, speed or data.
- 02
Enter value and units
Select the source and target unit and type the value.
- 03
Review equivalents
See the result plus the value in the other supported units.
Frequently asked questions
How accurate are the conversions?
International standard factors are used. For scientific work requiring very high precision, use a specialised tool.
Why is Fahrenheit not a simple multiplier?
Celsius and Fahrenheit have different zero points, so the conversion includes an offset as well as a scale factor.
Is my data stored?
No. All conversions run locally in your browser.
Data basis: 2026 · Annual constants live in structured JSON files and are updated once a year.
Results are unverified model calculations and do not replace tax, legal or financial advice.