Convert centimeters to inches
Enter any value to calculate the result instantly.
centimeters to inches formula
Divide centimeters by exactly 2.54, or multiply by approximately 0.3937007874.
Conversion table
Use these reference values for a quick comparison. The calculator above accepts positive, negative, decimal, and large values when they are meaningful for the quantity.
| centimeters | inches |
|---|---|
| 1 cm | 0.39370079 in |
| 5 cm | 1.96850394 in |
| 10 cm | 3.93700787 in |
| 30 cm | 11.81102362 in |
| 100 cm | 39.37007874 in |
| 180 cm | 70.86614173 in |
How to use this converter
Enter the source measurement in the first field. CalUnit applies the displayed formula and updates the destination value immediately. You can use decimals and negative values, copy the result into your work, and compare it with the reference table. Keep the original unit beside the starting measurement so another reader can verify the calculation. For a different unit pair, open the complete length conversion guide or the multi-unit length converter.
When this conversion is useful
Clothing and screen sizes can use different measurement conventions beyond the unit itself. Use the conversion for physical dimensions, then check the manufacturer's sizing method.
Accuracy and rounding
The centimeter-to-inch relationship is exact, while the displayed multiplier is rounded. Division by 2.54 gives the most direct calculation.
Standards references
CalUnit checks physical unit relationships against authoritative measurement references. See the NIST Guide to the SI conversion factors and the BIPM SI Brochure. Regional cooking measures and digital storage conventions are identified separately because their names can represent more than one definition.