Unit Converter
Convert length, weight, and temperature between common units.
Last updated August 26, 2026
About this tool
Converting between metric and imperial units — or just between scales within the same system — comes up constantly in cooking, construction, travel, and science. This tool covers length, weight, and temperature conversions, with temperature handled separately since it requires an offset formula rather than a simple multiplier.
Common conversion factors
| Conversion | Factor |
|---|---|
| 1 mile | 1.60934 kilometers |
| 1 kilogram | 2.20462 pounds |
| 1 inch | 2.54 centimeters |
| 0°C | 32°F / 273.15 K |
Frequently asked questions
Why can't temperature be converted with a simple multiplier like length and weight?
Celsius, Fahrenheit, and Kelvin scales have different zero points as well as different degree sizes, so converting between them requires an offset (like × 9⁄5 + 32 for Celsius to Fahrenheit) rather than just multiplying by a fixed ratio.
How precise are the conversion factors used?
They use standard internationally defined conversion factors (e.g. exactly 1,609.344 meters per mile), so results are accurate to within floating-point rounding.
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