Convert inches to centimeters
Enter any value to calculate the result instantly.
inches to centimeters formula
Multiply inches by exactly 2.54. The international inch is defined as precisely 2.54 centimeters.
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.
| inches | centimeters |
|---|---|
| 1 in | 2.54 cm |
| 2 in | 5.08 cm |
| 6 in | 15.24 cm |
| 12 in | 30.48 cm |
| 24 in | 60.96 cm |
| 55 in | 139.7 cm |
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
Product listings often mix inch and centimeter dimensions. Convert every dimension separately and keep width, height, and depth in the same order.
Accuracy and rounding
The conversion is exact. Real products and body measurements still have measurement uncertainty, so round the converted value appropriately.
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.