Free Unit Converter Online: Length, Weight, Temp & More
Convert length, weight, temperature, volume and speed instantly: meters to feet, kilos to pounds, °C to °F and more.
Convert length, weight, temperature, volume and speed units instantly: meters to feet, kilos to pounds, Celsius to Fahrenheit and much more.
By VOV · Last updated: October 21, 2026
How it works
Each conversion uses exact factors relative to a base unit (meter, kilogram, liter, meter per second). Temperature is the exception: it uses the official conversion formulas between Celsius, Fahrenheit and Kelvin, not multiplication factors. Results are rounded only for display; the internal calculation keeps full precision.
Use cases
- Convert 5 miles to kilometers to understand the real distance of your upcoming marathon race
- Turn 2 cups into milliliters to follow an American recipe with your metric measuring cup
- Convert 150 pounds to kilos to log your weight correctly in a European fitness app
Frequently asked questions
How many feet are in a meter?
1 meter = 3.28084 feet. And 1 foot = 30.48 cm exactly.
How do I convert Celsius to Fahrenheit?
Multiply by 9/5 and add 32: 25 °C = 77 °F. The other way: subtract 32 and multiply by 5/9.
How much is a pound in kilos?
1 pound = 0.453592 kg. And 1 kg = 2.20462 pounds.