Length Converter
Convert between metric and imperial length units. Millimeters, centimeters, meters, kilometers, inches, feet, yards, miles. Free, instant.
Common Conversion References
| 1 inch (in) | = 2.54 centimeters (cm) |
| 1 foot (ft) | = 30.48 centimeters (cm) |
| 1 yard (yd) | = 0.9144 meters (m) |
| 1 mile (mi) | = 1.609 kilometers (km) |
About Length Converter
Convert between 8 common length units — metric (mm, cm, m, km) and imperial (in, ft, yd, mi). Real-time conversion with clear formula display. All calculations run in your browser with no server calls.
8 Units
Millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles. All common length units covered for everyday use.
Metric ↔ Imperial
Convert between metric and imperial systems seamlessly. From millimeters to miles, centimeters to inches — all supported.
Real-Time Results
Results update as you type or change units. No submit button needed. See both the converted value and the formula.
Conversion Reference
Built-in quick reference for the most common conversions: inches to cm, feet to cm, yards to meters, miles to km.
How It Works
- Enter a value — Type the numeric length you want to convert. Use decimals for precise measurements (e.g., 2.54).
- Select units — Choose the "From" unit (the unit of your input value) and the "To" unit (what you want to convert to) from the dropdown menus.
- Read the result — The converted value appears instantly with the formula used. The conversion goes through meters as the base unit.
- Check references — Use the common conversions table for everyday references like inches to centimeters and miles to kilometers.