Unit Converter
Convert length, weight, temperature, speed and area units instantly. Free, private.
🔄 Conversion Tools
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Common Conversion Reference
| From | To | Multiply by |
|---|---|---|
| km | miles | 0.621371 |
| miles | km | 1.609344 |
| kg | lb | 2.20462 |
| lb | kg | 0.453592 |
| metres | feet | 3.28084 |
| litres | US gallons | 0.264172 |
| km/h | mph | 0.621371 |
| knots | km/h | 1.852 |
Temperature Conversion Formulas
Temperature cannot be converted with a simple multiplication factor:
- Celsius to Fahrenheit: °F = (°C × 9/5) + 32
- Fahrenheit to Celsius: °C = (°F − 32) × 5/9
- Celsius to Kelvin: K = °C + 273.15
Key references: Water freezes at 0 °C / 32 °F and boils at 100 °C / 212 °F. Absolute zero is 0 K / −273.15 °C.
Metric vs Imperial
The metric system (SI) is built on base-10 units used worldwide. The imperial system — primarily used in the United States — uses units like inches, pounds and gallons. This converter handles the fixed multiplication factors automatically.