Length and distance units
This converter supports common metric and imperial length units used for measurements ranging from small dimensions to long distances. Standard international conversion factors are used for the calculations.
Length conversion reference table
These common relationships can help you compare the different units at a glance.
| Unit | Equivalent | Common Abbreviation |
|---|---|---|
| 1 millimeter | 0.1 centimeter | mm |
| 1 centimeter | 10 millimeters | cm |
| 1 inch | 2.54 centimeters | in |
| 1 foot | 12 inches = 30.48 centimeters | ft |
| 1 yard | 3 feet = 0.9144 meters | yd |
| 1 meter | 100 centimeters = 1,000 millimeters | m |
| 1 kilometer | 1,000 meters | km |
| 1 mile | 5,280 feet = 1,760 yards | mi |
Common length conversion examples
Here are some frequently used metric and imperial conversions:
| From | To |
|---|---|
| 1 inch | 2.54 cm |
| 10 cm | 3.93701 inches |
| 100 cm | 1 meter = 39.3701 inches |
| 1 meter | 3.28084 feet |
| 1 kilometer | 0.621371 miles |
| 1 mile | 1.609344 kilometers |
Feet and inches
Some measurements, especially height and construction dimensions, are commonly expressed as feet and inches rather than decimal feet. For example, 5.5 feet is equal to 5 feet 6 inches.
When the converter provides a feet-and-inches breakdown, the inches represent the remainder after the whole feet have been removed. For example, 5.75 feet is 5 feet plus 0.75 feet, and 0.75 × 12 = 9 inches, giving 5 ft 9 in.
Metric and imperial length units
Metric length units are based on powers of 10, making conversions within the metric system straightforward: 1 meter = 100 centimeters and 1 centimeter = 10 millimeters. Imperial units use different relationships, such as 12 inches per foot and 3 feet per yard.
Popular Length Converters
Convert specific units with Inches to CM, CM to Inches, Inches to MM, MM to Inches, Feet to Inches, Inches to Feet, KM to Miles, or Miles to KM.
Frequently asked questions
How many centimeters are in an inch?
One inch is exactly 2.54 centimeters.
How many inches are in a foot?
There are exactly 12 inches in one foot.
How many feet are in a meter?
One meter is approximately 3.28084 feet.
How many kilometers are in a mile?
One mile is exactly 1.609344 kilometers.
How do I convert millimeters to inches?
Divide the millimeter value by 25.4. For example, 25.4 mm equals exactly 1 inch. You can also use our MM to Inches Converter.