Length Converter
Enter a value and select the source and target units to convert between eight common length units: millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles. The conversion happens instantly as you type — no button needed.
The converter handles both metric and imperial units, so it works for everyday measurements (height, room dimensions), engineering (millimeters and meters), and navigation or travel (kilometers and miles). All conversion factors are precise and bidirectional.
This is a straightforward unit conversion tool that runs entirely in your browser. Useful for quick lookups, homework, travel planning, and any situation where you need to switch between measurement systems.
By The Paper Room Editorial Team — Converter Tools
Frequently asked questions
How many centimeters are in an inch?▼
One inch equals exactly 2.54 centimeters. This is the international standard, defined since 1959.
How do I convert miles to kilometers?▼
Multiply by 1.609344. One mile equals exactly 1.609344 kilometers. For a rough estimate, multiply miles by 1.6.
What is the difference between metric and imperial?▼
Metric (mm, cm, m, km) is a base-10 system used by most of the world. Imperial (inch, foot, yard, mile) is used primarily in the United States, United Kingdom (partially), and a few other countries. This converter handles both seamlessly.