Length Converter for Inches, Feet, Centimeters, Meters and More

This length converter helps you convert measurements between millimeters, centimeters, inches, feet, yards, meters, kilometers, and miles. Enter any value, choose the starting unit and the unit you want to convert to, and the result appears instantly.

Along with the main conversion, the tool also shows the same length in several other common units. This can be useful when you want to compare metric and imperial measurements or understand a measurement in a unit you use more often.

How to Use the Length Converter

Enter the number you want to convert in the first box. Then choose the original length unit and the unit you want the answer in. You can also use the swap button to quickly reverse the conversion.

For example, you can convert inches to feet, centimeters to inches, meters to feet, miles to kilometers, or any other supported pair without opening a separate converter page.

Common Length Conversions

Metric and Imperial Length Units

Metric length units include millimeters, centimeters, meters, and kilometers. They are based on powers of ten, which makes moving between metric units straightforward.

Imperial and US customary length units commonly include inches, feet, yards, and miles. These units are often used for height, room sizes, product dimensions, road distances, and everyday measurements in the United States and some other places.

Why Use a Length Conversion Tool?

A length calculator is useful when a measurement is given in a unit you do not normally use. It can help with shopping, travel, home projects, school work, construction, product sizes, screen dimensions, room measurements, and many other everyday tasks.

The size visualizer also gives approximate comparisons with familiar objects. These examples are not a replacement for exact measuring, but they can make an unfamiliar length easier to picture.