CM to Inches Converter
Enter a value to instantly convert between length units.
1 Centimeter = 0.3937 Inch
Key Formulas
Centimeter → Inch
in = cm × 0.393701Kilometer → Mile
mi = km × 0.621371Foot → Meter
m = ft × 0.3048Inch → Centimeter
cm = in × 2.54Formula
inches = cm × 0.3937007874One centimeter equals 0.3937 inches. The centimeter is 1/100th of a meter, the SI base unit of length. The inch is defined as exactly 25.4 millimeters since 1959.
Source: NIST SP 811, 2008 Edition
Last reviewed: · see our methodology
Frequently Asked Questions
Real-World Examples
Width of a credit card
5 cm = 1.9685 in
Standard school ruler length
30 cm = 11.811 in
Slightly more than one yard
100 cm = 39.3701 in
A person who is 170 cm tall stands about 5 feet 7 inches — useful when filling out a US medical form that asks for height in feet and inches
170 cm = 66.9291 in
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Further Reading
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How to Take Body Measurements for Accurate Clothing Sizes
Which body measurements clothing sizes are actually based on, how to take them accurately at home, and why your 'usual size' doesn't always travel between brands or countries.
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How We Verify Our Conversion Factors
Where Convert Calc's conversion factors come from, how they're checked, and how often they're reviewed — our methodology for keeping every converter accurate.
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Metric vs. Imperial: How Two Measurement Systems Ended Up Coexisting
The history behind the metric and imperial/US customary systems, why the US never fully converted, and why both are still in everyday use today.
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Shoe Size Conversion Guide: US, UK, EU, and Centimeters
Why shoe sizes don't convert with a simple formula, how US, UK, and EU sizing systems differ, and how to measure your foot to find your true size.