UtilityBaseCalculators
CM to Inches Converter
Convert centimeters to inches and back — edit either box, both update.
Updated July 10, 2026
How to use the cm to inches converter
- 1Enter a value in centimeters.
- 2Read the equivalent in inches.
- 3Or type an inches value to convert the other way.
- 4Check the reference table for common lengths.
Common uses
- Converting a height between metric and imperial
- Reading a screen or paper size
- Following measurements in another unit system
- Sewing, crafts, and DIY measurements
Frequently asked questions
How many inches is 1 cm?
One centimeter is about 0.3937 inches, since an inch is defined as exactly 2.54 centimeters. To convert centimeters to inches, divide by 2.54; to go from inches to centimeters, multiply by 2.54.
How do I convert cm to inches by hand?
Divide the centimeter value by 2.54. For example, 30 cm is 30 divided by 2.54, which is about 11.8 inches. This tool does it instantly in both directions and shows common values.
Is the inch-to-cm relationship exact?
Yes. Since 1959 the inch has been defined as exactly 2.54 centimeters, so the conversion is exact, not an approximation. Rounding only appears in the displayed decimals.
About this tool
The cm to inches converter turns centimeters into inches and inches into centimeters instantly. One inch is defined as exactly 2.54 centimeters, so centimeters convert to inches by dividing by 2.54. Edit either field and the other updates live, and a quick-reference table shows common values. It's the everyday conversion for heights, screen sizes, paper, and measurements moving between metric and US or imperial units. Everything is calculated in your browser.
Like most tools on UtilityBase, the cm to inches converter runs entirely in your browser — nothing you enter is uploaded or stored on a server. It's free to use with no account required. Browse more calculators here.
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