Free unit converter
Convert inches to centimeters using the exact metric definition.
Converted value
Enter a value and convert.
How this converter works
The converter multiplies inches by 2.54 because one inch is defined as exactly 2.54 centimeters.
Worked example
Twelve inches equals exactly 30.48 centimeters.
Frequently asked questions
Is 2.54 exact?
Yes. One international inch is defined as exactly 2.54 centimeters.
Can I enter a fraction as a decimal?
Yes. For example, enter 0.5 for half an inch.
Are negative values supported?
No. This tool is designed for physical lengths.