Length Calculator
Convert between different units of length including meters, feet, inches, yards, miles, and kilometers.
How to use this tool:
- Enter a value in any of the input fields
- The tool will automatically convert to all other length units
- Use metric units (mm, cm, m, km) for international measurements
- Use imperial units (in, ft, yd, mi) for US/UK measurements
- Click the Reset All Values button to start over
- Scroll down to learn about different length units and their relationships
Metric Units
Imperial Units
About Length Units
Metric System:
- Millimeter (mm): 1/1000 of a meter
- Centimeter (cm): 1/100 of a meter
- Meter (m): Base unit of length in the metric system
- Kilometer (km): 1000 meters
Imperial System:
- Inch (in): 1/12 of a foot
- Foot (ft): 12 inches
- Yard (yd): 3 feet
- Mile (mi): 5280 feet or 1760 yards
The metric system is used worldwide, while the imperial system is primarily used in the United States and a few other countries.
Common Conversions:
- 1 inch = 2.54 centimeters
- 1 foot = 0.3048 meters
- 1 yard = 0.9144 meters
- 1 mile = 1.60934 kilometers
- 1 meter = 3.28084 feet
- 1 kilometer = 0.621371 miles