Length
cm to inches Converter
1 cm = 0.3937 in. Enter any value and the result updates instantly.
Convert
Accuracy and rounding
For product dimensions, rulers, and screen specs. Exact: 1 in = 2.54 cm.
Cm and inches are tied back to the SI meter through fixed definitions, so the underlying conversion factor is stable.
For cutting, fitting, drawings, and product specs, keep extra decimals in inches and round only at the final step.
How to convert cm to inches
- Type the cm value in the calculator.
- Keep cm selected as the from unit and inches selected as the to unit.
- Use the instant result, or copy it with the copy button.
cm to inches chart
| cm | inches |
|---|---|
| 1 cm | 0.3937 in |
| 2 cm | 0.7874 in |
| 5 cm | 1.9685 in |
| 10 cm | 3.937 in |
| 25 cm | 9.8425 in |
| 50 cm | 19.685 in |
| 100 cm | 39.3701 in |
Formula
in = cm x 0.393700787402
Example: 1 cm = 0.3937 in.
Source
SI meter definitions and exact international inch, foot, yard, and mile relationships.
Common questions
How do I convert cm to inches?
Enter the cm value in the converter, or multiply by the factor shown in the formula. 1 cm = 0.3937 in.
What should I watch out for?
Round only after converting if the measurement is used for cutting, fitting, or specifications.
Where does this length conversion come from?
SI meter definitions and exact international inch, foot, yard, and mile relationships. ConverterBase uses stable definitions and fixed conversion factors, not live or rounded market data.