Free Unit Converter
Convert measurements across four categories - length, weight, temperature, and volume - between Metric and Imperial systems. Type any value and the converter instantly shows the equivalent in every other unit within that category. Whether you're a home cook converting recipe measurements between cups and milliliters, a traveler figuring out kilometers to miles, a student working on science or math homework, a DIY enthusiast comparing metric and imperial tool sizes, or a fitness enthusiast tracking weight in kilograms or pounds, this all-in-one converter handles it all. The simultaneous conversion matrix shows every possible unit at once so you don't have to swap back and forth between different conversion pairs.
How to Use
- Select a category - Length, Weight, Temperature, or Volume
- Enter a value in any unit field
- All other units in that category update instantly
- Copy any converted value with one click
Categories
- Length: Meters, Kilometers, Miles, Yards, Feet, Inches
- Weight: Kilograms, Grams, Pounds, Ounces
- Temperature: Celsius, Fahrenheit, Kelvin
- Volume: Liters, Gallons, Quarts, Pints, Cups
Privacy
All conversions happen locally in your browser. No data is transmitted.
Common Conversion Examples
- Travel: Convert kilometers to miles before a road trip or race plan.
- Cooking: Convert liters, cups, pints, and gallons when adapting recipes.
- Fitness: Convert kilograms and pounds when comparing body weight, gym equipment, or training plans.
- Science homework: Compare metric and imperial values without rebuilding the formula each time.
Accuracy Notes
Conversions use standard unit relationships and are suitable for everyday planning, education, and quick checks. For engineering, medical dosing, lab work, aviation, construction, or legal metrology, verify the result with approved reference tables and required precision rules.
Last reviewed: July 2026.
Quick Answer
To convert a value, choose the category, type a number into any unit field, and read the equivalent values in the other fields. The page updates locally in your browser and does not transmit the values you enter.