Unit converter

Length, weight, temperature, area, volume and speed — all conversions in one place.

Did you know?

The metric system was first adopted during the French Revolution in 1795. Today only three countries have not officially adopted it: the United States, Liberia and Myanmar.

Unit conversion reference

Length: 1 mile = 1.609 km | 1 inch = 2.54 cm | 1 foot = 30.48 cm
Weight: 1 lb = 0.4536 kg | 1 oz = 28.35 g | 1 stone = 6.35 kg
Temperature: °F = (°C × 9/5) + 32 | °C = (°F − 32) × 5/9
Speed: 1 mph = 1.609 km/h | 1 knot = 1.852 km/h

FAQ

How do I convert Celsius to Fahrenheit?

Multiply by 9/5 and add 32. Example: 20°C = (20 × 9/5) + 32 = 68°F.

How many kilometers in a mile?

1 mile = 1.60934 kilometers. 1 kilometer = 0.62137 miles.

How many pounds in a kilogram?

1 kilogram = 2.20462 pounds. 1 pound = 0.453592 kilograms.

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Unit conversion reference

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