To convert lengths, enter a value, choose the unit you have and the unit you want, and the Length Converter shows the result instantly. It covers millimeters, centimeters, meters, kilometers, inches, feet, yards and miles.
How to use the Length Converter
- Enter the value.
- Choose the unit you are converting from.
- Choose the unit to convert to.
- Read and copy the result.
Worked example
One inch is exactly 2.54 centimeters, so 10 inches is 25.4 cm. One mile is about 1.609 kilometers.
Tips and common mistakes
- Exact definitions: 1 inch = 2.54 cm, 1 foot = 0.3048 m and 1 mile = 1,609.344 m.
- For quick mental math, a meter is a little longer than a yard.
- Round only at the end to avoid compounding errors.
Frequently asked questions
How many centimeters are in an inch?
Exactly 2.54.
How many feet are in a mile?
5,280.
Is it private?
Yes. Conversion runs in your browser.