Length Converter
Convert length and distance between common metric and imperial units including meters, kilometers, centimeters, feet, inches, yards and miles.
Enter any length and instantly see its equivalent in multiple units.
Convert Length
Enter a value and select the unit you want to convert.
Length Conversion Results
Length Conversion Summary
Input Length
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Meters
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Feet
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Miles
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Metric and Imperial Length Units
Length can be measured using different systems around the world. The metric system uses units such as millimeters, centimeters, meters and kilometers, while the imperial system commonly uses inches, feet, yards and miles.
| Unit | Symbol | Relationship |
|---|---|---|
| Millimeter | mm | 1 mm = 0.001 m |
| Centimeter | cm | 1 cm = 0.01 m |
| Meter | m | Base metric length unit |
| Kilometer | km | 1 km = 1,000 m |
| Inch | in | 1 in = 25.4 mm |
| Foot | ft | 1 ft = 12 in |
| Yard | yd | 1 yd = 3 ft |
| Mile | mi | 1 mi = 5,280 ft |
Common Length Conversions
| Conversion | Equivalent |
|---|---|
| 1 inch | 2.54 cm |
| 1 foot | 0.3048 m |
| 1 yard | 0.9144 m |
| 1 mile | 1.609344 km |
| 1 meter | 3.28084 ft |
| 1 kilometer | 0.621371 mi |
Length Conversion Formula
The calculator first converts the entered measurement into meters. It then converts the meter value into every supported length unit.
1 inch = 0.0254 meters
1 foot = 0.3048 meters
1 yard = 0.9144 meters
1 mile = 1,609.344 meters
1 kilometer = 1,000 meters
Length Conversion Example
Suppose you want to convert 10 feet into metric units.
10 ft = 3.048 m
10 ft = 304.8 cm
10 ft = 3,048 mm
The same 10 feet is approximately 3.3333 yards and 0.001864 miles.
Where Length Conversion Is Useful
Length conversions are useful when measurements are provided in different units or when working between metric and imperial systems.
| Situation | Useful Units |
|---|---|
| Room measurements | Feet, inches, meters |
| Travel distances | Kilometers, miles |
| Construction | Millimeters, centimeters, feet, inches |
| Engineering | Millimeters, meters |
| Everyday measurements | Centimeters, inches, feet |
Frequently Asked Questions
How many feet are in a meter?
One meter equals approximately 3.28084 feet.
How many centimeters are in an inch?
One inch equals exactly 2.54 centimeters.
How many kilometers are in a mile?
One international mile equals exactly 1.609344 kilometers.
How many inches are in a foot?
One foot contains exactly 12 inches.
How many feet are in a yard?
One yard contains exactly 3 feet.
What is the difference between metric and imperial units?
Metric units are based on powers of ten, while commonly used imperial units include inches, feet, yards and miles.