Unit Converter
Convert between length, weight, volume, and temperature units — metric, imperial, and everything in between.
Conversion group
Enter values and click Calculate.
How to use this calculator
- Choose the conversion group: length, weight, volume, or temperature.
- Enter the numeric value you want to convert.
- Select the unit you're converting from and the unit you're converting to.
- Click Convert to see the result and the conversion factor.
When people use this
- Converting recipe measurements between metric and imperial.
- Fitness and health tracking: kg to lb, miles to km.
- Science and homework: unit conversions for labs and exercises.
- Travel: converting distances, temperatures, and volumes between countries.
Examples
- 100 cm → 39.37 in (factor: 0.3937)
- 50 kg → 110.23 lb (factor: 2.2046)
- 2 L → 67.63 fl oz (factor: 33.814)
- 100 °C → 212 °F (water boiling point)
FAQ
Which unit groups are supported?Length (mm to mi), weight (mg to lb), volume (ml to gal), and temperature (°C/°F/K).
Can I convert between different groups?No — units must be in the same group. Choose the appropriate group first.
Why is the temperature conversion different?Temperature uses formulas, not a simple multiplication factor, because scales have different zero points.
What's the conversion factor shown?It tells you how many of the target unit equal 1 of the source unit — useful for mental conversions.
Are UK and US gallons different?Yes — this converter uses the US gallon (3,785 ml). The UK gallon is ~4,546 ml.