Inches to Centimeters Converter
Inches are the default unit of length in the United States, while centimeters rule the rest of the world — so converting inches to centimeters is one of the most common everyday calculations. You need it when a US recipe calls for an 8-inch pan, when someone's height is given as 5 foot 9, or when a laptop screen is advertised as 15.6 inches. The international definition fixes 1 inch at exactly 2.54 centimeters, making this conversion perfectly precise: just multiply inches by 2.54. Try the converter above for instant answers, scan the table for everyday values, or read the FAQs for the questions everyone asks.
Inches to CM Calculator
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Quick Reference Table
| Inches (in) | Centimeters (cm) |
|---|---|
| 1 | 2.54 |
| 2 | 5.08 |
| 3 | 7.62 |
| 4 | 10.16 |
| 5 | 12.7 |
| 6 | 15.24 |
| 7 | 17.78 |
| 8 | 20.32 |
| 9 | 22.86 |
| 10 | 25.4 |
| 25 | 63.5 |
| 50 | 127 |
| 100 | 254 |
| 500 | 1270 |
Frequently Asked Questions
How many centimeters are in 10 inches?
10 inches = 25.4 centimeters. Just apply the conversion to any value with the converter above.
What is the formula to convert inches to centimeters?
To convert inches to centimeters, multiply the number of inches by 2.54. In short: 1 in = 2.54 cm.
Why is the inch defined as exactly 2.54 cm?
In 1959, the United States, United Kingdom, Canada, Australia, New Zealand, and South Africa signed the international yard and pound agreement, defining the yard as exactly 0.9144 meters. Since a yard is 36 inches, the inch became exactly 2.54 centimeters — a definition, not a measurement, so it never changes.
How do I convert centimeters back to inches?
Simply reverse the math: to go from centimeters to inches, divide the centimeters by 2.54. Or use our dedicated Centimeters to Inches converter.