Length Converter
Convert between mm, cm, m, km, inches, feet, yards, miles and nautical miles — instantly.
Convert any length or distance instantly
The Length Converter converts between every common unit of length and distance — millimeters, centimeters, meters, kilometers, inches, feet, yards, miles, and nautical miles. Type a value, pick your units, and the result appears instantly with a one-click copy. It bridges the metric and imperial systems accurately, so you never have to remember conversion factors again.
Metric and imperial in one place
The world uses two main measurement systems. The metric system (millimeters to kilometers) is used by most countries and all of science, while the imperial system (inches to miles) remains common in the United States. Converting between them comes up constantly — reading a recipe, following a fitness plan, interpreting product dimensions, or planning travel. This tool removes the friction by handling both systems together.
Common length conversions
| From | To | Multiply by |
|---|---|---|
| Inches | Centimeters | 2.54 |
| Feet | Meters | 0.3048 |
| Miles | Kilometers | 1.609 |
| Meters | Feet | 3.281 |
| Yards | Meters | 0.9144 |
How to use the length converter
- Enter a value in the From field.
- Select the unit you are converting from and the unit you want to.
- Read the result instantly, or tap the swap button to reverse the conversion.
What is a nautical mile?
A nautical mile (1,852 meters) is used in aviation and maritime navigation because it corresponds to one minute of latitude, which makes chart work simpler. It is slightly longer than a standard "statute" mile of 1,609.344 meters. Including it here means navigators and aviation enthusiasts get accurate conversions alongside everyday units.
Accuracy you can rely on
Every conversion uses the exact internationally defined factors — an inch is precisely 2.54 centimeters, a foot is 0.3048 meters, and a mile is 1,609.344 meters. The tool computes results to high precision and trims trailing zeros for readability, so you get a clean, correct answer whether you are converting a tiny measurement in millimeters or a long distance in miles.
Private and free
All conversions run locally in your browser. Nothing is uploaded, and there are no limits — convert as many measurements as you need, for free.
Frequently asked questions
How many centimeters are in an inch?
Exactly 2.54 centimeters. To convert inches to centimeters, multiply by 2.54.
How do I convert miles to kilometers?
Multiply the number of miles by 1.609344. For example, 5 miles is about 8.05 kilometers.
What units does this converter support?
Millimeters, centimeters, meters, kilometers, inches, feet, yards, miles, and nautical miles.
Is the converter accurate?
Yes. It uses the exact international definitions for each unit and computes to high precision.