Inches to Centimeters
Convert inches to centimeters instantly. The formula is cm = in × 2.54, and the reference table below covers the values people look up most.
1 in equals
2.5400 cm
cm = in × 2.54
Formula
cm = in × 2.54
The international inch was fixed at exactly 2.54 cm in 1959.
Inches to Centimeters table
| Inches | Centimeters |
|---|---|
| 1 in | 2.5400 cm |
| 2 in | 5.0800 cm |
| 3 in | 7.6200 cm |
| 5 in | 12.7000 cm |
| 10 in | 25.4000 cm |
| 15 in | 38.1000 cm |
| 20 in | 50.8000 cm |
| 25 in | 63.5000 cm |
| 30 in | 76.2000 cm |
| 50 in | 127.0000 cm |
| 100 in | 254.0000 cm |
Frequently asked questions
How many centimeters are in a inche?
One inche equals 2.5400 centimeters. The international inch was fixed at exactly 2.54 cm in 1959.
What is the formula to convert inches to centimeters?
cm = in × 2.54. Enter any value above and the result updates as you type, with no rounding until the final display.
How do I convert centimeters back to inches?
Use the reverse conversion: divide instead of multiplying, or open the centimeters to inches page for the same tool the other way round.
Is this inches to centimeters conversion exact?
The underlying factor is the internationally defined one, so the only rounding happens when the result is displayed. The table below shows values rounded to 4 decimal places.