Unit converter

Type a number, pick two units, and read the answer as you type. Length, weight, temperature, volume, speed, area, energy, pressure, fuel economy, time and data.

Popular conversion charts

Miles to kilometers1 mi = 1.60934 km Celsius to Fahrenheit1 °C = 33.8 °F Pounds to kilograms1 lb = 0.453592 kg Inches to centimeters1 in = 2.54 cm Cups to milliliters1 cup = 236.588 mL Miles per hour to kilometers per hour1 mph = 1.60934 km/h

About the numbers

Most conversions here use exact definitions. An inch is 2.54 cm, a pound is 0.45359237 kg and a mile is 1,609.344 m. Units that differ between countries are labeled, such as US cups and US gallons. Read more about how the converter works.