Length Converter
The Length Converter instantly converts between metric and imperial units — millimeters, centimeters, meters, kilometers, inches, feet, yards, miles and nautical miles. Choose your source and target units and the result updates live, with the exact conversion factor shown.
What this means
Length measures distance. Different countries and fields use different units — metric meters for science, feet and miles for road distances in the US, and inches for screens. Converting is simply multiplying by the exact ratio between the two units.
How we calculate it
Formula
Result = Value × (factor of source unit) ÷ (factor of target unit). Each unit is defined exactly against the meter (1 in = 0.0254 m).Worked example
How many centimeters are in 1 inch?
- 11 inch = 0.0254 m, and 1 cm = 0.01 m
- 2Factor = 0.0254 ÷ 0.01 = 2.54
- 31 inch = 2.54 cm
Important assumptions
- All factors use the exact international definitions (1 inch = 2.54 cm, 1 mile = 1,609.344 m).
Frequently asked questions
How do I convert cm to inches?
Divide the centimeters by 2.54. For example, 10 cm ÷ 2.54 ≈ 3.94 inches.
How many feet are in a meter?
One meter equals about 3.28084 feet (or 39.3701 inches).
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