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Length Converter

Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles instantly in your browser.

How to use the Length Converter

  1. Enter the value you want to convert.
  2. Choose the unit you are converting from.
  3. Choose the unit you are converting to.
  4. Click Run to see the converted value, for example 10 cm = 3.937 in.

How the Length Converter works

The converter turns your value into meters and then into the target unit. Imperial units have exact metric definitions: 1 inch = 2.54 cm, 1 foot = 12 inches = 0.3048 m, 1 yard = 3 feet = 0.9144 m and 1 mile = 1,760 yards = 1.609344 km.

So 6 feet is 1.8288 m, a 5 km run is 3.107 miles, and a 15.6-inch laptop screen measures 39.6 cm diagonally. Results are exact to the precision shown, with no rounding in between.

Frequently asked questions

Is this length converter free?
Yes. Convert lengths and distances at no cost, with no account required.
Which units are supported?
Millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles.

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