Unit Converter
Convert between common units of measurement including length, weight, temperature, and volume. Fast, accurate, and easy to use online unit converter.
Unit conversion is needed daily in science, cooking, travel, engineering, and fitness contexts. The metric and imperial systems use entirely different base units, and converting between them correctly is essential for avoiding costly mistakes. Our Unit Converter handles the four most common categories: length (kilometers, miles, feet, centimeters, inches), weight and mass (kilograms, pounds, ounces, grams), temperature (Celsius, Fahrenheit, Kelvin), and volume (liters, gallons, milliliters, fluid ounces).
All conversions use scientifically established conversion factors accurate to multiple decimal places. Temperature conversion deserves special attention: unlike other unit conversions, it is not a simple multiplication. Fahrenheit to Celsius requires the formula (F − 32) × 5/9, while Kelvin to Celsius is K − 273.15. The tool handles these formulas correctly, giving you reliable results for science, cooking, and everyday use without requiring you to memorize conversion factors.
How to Use Unit Converter
- Select the unit category (length, weight, temperature, or volume).
- Choose the source and target units.
- Enter the value you want to convert.
- The converted result appears instantly.