Unit Conversion Calculator
Convert between any units of length, weight, temperature, area, volume, and speed. Instant results.
Common Unit Conversions
Our unit converter supports the most commonly used conversions: kilometers to miles, kilograms to pounds, Celsius to Fahrenheit, meters to feet, liters to gallons, and many more. The calculator covers metric (SI) and imperial (US/UK) systems.
Length Quick Reference
1 inch = 2.54 cm | 1 foot = 30.48 cm | 1 yard = 0.9144 m | 1 mile = 1.60934 km | 1 nautical mile = 1.852 km
Weight Quick Reference
1 pound = 0.453592 kg | 1 ounce = 28.3495 g | 1 stone = 6.35029 kg | 1 ton (short) = 907.185 kg
Temperature Reference
°F = °C × 9/5 + 32 | °C = (°F – 32) × 5/9 | K = °C + 273.15
FAQs
What is the difference between metric and imperial?
Metric (SI) uses meters, kilograms, litres. Imperial uses feet, pounds, gallons. Most countries use metric; the US primarily uses imperial.
How do I convert temperature?
Celsius to Fahrenheit: multiply by 9/5 and add 32. Celsius to Kelvin: add 273.15.