Unit Converter
Convert length, weight, and temperature units instantly.
How to use the unit converter
- Pick a category: length, weight, or temperature.
- Choose the unit you're converting from and to.
- Enter a value to see the converted result instantly.
Convert between common length, weight, and temperature units, including meters, feet, kilograms, pounds, Celsius, and Fahrenheit. Pick a category, enter a value, and get instant conversions.
Handy conversion factors
Some conversions come up all the time: 1 inch is exactly 2.54 cm, 1 foot is 30.48 cm, 1 mile is about 1.609 km, and 1 kilogram is about 2.205 pounds. Multiplying or dividing by these factors gets you most everyday conversions.
Temperature works differently because the scales start at different zero points. To convert Celsius to Fahrenheit, multiply by 9/5 and add 32, so 20 °C is 68 °F. To go back, subtract 32 and multiply by 5/9. Kelvin is Celsius plus 273.15.
Popular unit converter options
Frequently asked questions
Which units are supported?
Length: meters, kilometers, centimeters, miles, feet, inches. Weight: kilograms, grams, pounds, ounces. Temperature: Celsius, Fahrenheit, Kelvin.
Can I convert in both directions?
Yes, use the swap button to instantly reverse the 'from' and 'to' units.
How many feet are in a meter?
1 meter is about 3.281 feet, and 1 foot is 0.3048 meters.
At what temperature are Celsius and Fahrenheit equal?
At −40. −40 °C is exactly −40 °F.