Unit Converter

Length: 1 inch = 2.54 cm, 1 foot = 30.48 cm, 1 mile = 1.609 km
Weight: 1 lb = 0.4536 kg, 1 oz = 28.35 g
Temperature: °F = °C × 9/5 + 32, K = °C + 273.15

Convert between metric and imperial units for length, weight, volume, area, and temperature.

Common Conversions

How do I convert miles to kilometers?: 1 mile = 1.609 km. Multiply miles by 1.609 to get kilometers, or divide km by 1.609 for miles.
How do I convert pounds to kilograms?: 1 pound = 0.4536 kg. Multiply pounds by 0.4536 to get kg, or divide kg by 0.4536 for pounds.
How do I convert Fahrenheit to Celsius?: C = (F - 32) × 5/9. For example, 68°F = (68-32) × 5/9 = 20°C.
What is the difference between metric and imperial?: Metric uses meters, grams, liters (base 10). Imperial uses feet, pounds, gallons. Metric is used worldwide; imperial mainly in US, UK, and a few others.