Length Converter
Enter a length and its unit to see the equivalent in millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles.
Millimeters (mm)
1000
Centimeters (cm)
100
Meters (m)
1
Kilometers (km)
0.001
Inches (in)
39.37
Feet (ft)
3.281
Yards (yd)
1.094
Miles (mi)
0.000621
How length conversion works
All metric length units are powers of 10 apart (1 m = 100 cm = 1000 mm), making metric conversions a simple matter of moving the decimal point.
Imperial and metric units are related by fixed conversion factors — for example, 1 inch is exactly 2.54 centimeters, and 1 mile is exactly 1,609.344 meters. This calculator uses those exact factors for every conversion.
Frequently asked questions
How many centimeters are in an inch?
1 inch equals exactly 2.54 centimeters.
How do I convert meters to feet?
Multiply the number of meters by 3.28084 to get feet, since 1 meter equals approximately 3.28084 feet.
What's the difference between a mile and a kilometer?
1 mile equals 1.609344 kilometers, so a mile is a little over 1.6 times longer than a kilometer.
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