Unit Converter
Convert length, weight, temperature, volume, area, speed and data — instantly.
Common conversions & formulas
The converter updates as you type, but here are the factors behind the most common metric-to-imperial conversions.
| Conversion | Formula | Example |
|---|---|---|
| Centimeters to inches | cm ÷ 2.54 | 10 cm = 3.94 in |
| Meters to feet | m × 3.28084 | 5 m = 16.40 ft |
| Kilometers to miles | km ÷ 1.60934 | 5 km = 3.11 mi |
| Kilograms to pounds | kg × 2.20462 | 10 kg = 22.05 lb |
| Celsius to Fahrenheit | (°C × 9/5) + 32 | 20 °C = 68 °F |
| Liters to gallons (US) | L ÷ 3.78541 | 10 L = 2.64 gal |
How conversion works
Most units are linear: each value is turned into a base unit (meters, grams, liters…) and then into your target unit, which keeps every result consistent. Temperature is different because the scales don’t share a zero point, so it uses formulas instead of a single factor.
Unit converter FAQ
How do I convert between metric and imperial?
Pick a category, choose your From and To units, and type a value. The result appears instantly, and you can swap the units with the middle button.
How many centimeters are in an inch?
One inch equals exactly 2.54 centimeters.
Is the unit converter free?
Yes — it’s completely free, needs no sign-up, and runs entirely in your browser.
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