This inches to centimeters converter gives you the in to cm result instantly, in your browser, with the exact ratio so you can verify it. 1 inch is exactly 2.54 centimeters, and going the other way, 1 centimeter is 0.393701 inches. Inches are an imperial unit still common in the United States and the United Kingdom; centimeters are part of the metric system used in most countries.
To convert by hand, multiply the number of inches by 2.54. For example, 10 inches is 25.4 centimeters and 100 inches is 254 centimeters. The table below lists the most requested values, and the converter above accepts decimals for anything in between.
in to cm formula
cm = in × 2.54
1 inch is exactly 2.54 centimeters. Multiply the value in inches by that factor to get centimeters.
Inches to Centimeters conversion table
| inches | centimeters | Rounded |
|---|---|---|
| 1 in | 2.54 cm | 2.54 |
| 2 in | 5.08 cm | 5.08 |
| 3 in | 7.62 cm | 7.62 |
| 4 in | 10.16 cm | 10.2 |
| 5 in | 12.7 cm | 12.7 |
| 6 in | 15.24 cm | 15.2 |
| 7 in | 17.78 cm | 17.8 |
| 8 in | 20.32 cm | 20.3 |
| 9 in | 22.86 cm | 22.9 |
| 10 in | 25.4 cm | 25.4 |
| 12 in | 30.48 cm | 30.5 |
| 15 in | 38.1 cm | 38.1 |
| 20 in | 50.8 cm | 50.8 |
| 25 in | 63.5 cm | 63.5 |
| 30 in | 76.2 cm | 76.2 |
| 40 in | 101.6 cm | 102 |
| 50 in | 127 cm | 127 |
| 60 in | 152.4 cm | 152 |
| 70 in | 177.8 cm | 178 |
| 75 in | 190.5 cm | 191 |
| 80 in | 203.2 cm | 203 |
| 90 in | 228.6 cm | 229 |
| 100 in | 254 cm | 254 |
| 150 in | 381 cm | 381 |
| 200 in | 508 cm | 508 |
| 250 in | 635 cm | 635 |
| 300 in | 762 cm | 762 |
| 500 in | 1,270 cm | 127 |
| 750 in | 1,905 cm | 1,905 |
| 1,000 in | 2,540 cm | 254 |
Frequently asked questions
How many centimeters are in 5 inches?
5 in = 12.7 cm. Multiply 5 by 2.54, the number of centimeters in one inch. The converter on this page does the same arithmetic for any value, including decimals.
What is the formula to convert inches to centimeters?
cm = in × 2.54. The factor comes from the definitions of the units: 1 inch is exactly 2.54 centimeters. Worked example: 12 in = 30.48 cm.
Is 30 in the same as 76.2 cm?
Yes. 30 in = 76.2 cm. Rounded to four decimals it is 76.2 cm.
How do I convert centimeters back to inches?
Divide by 2.54, or multiply by 0.393701: 1 centimeter is 0.393701 inches. The centimeters to inches page linked above lists common values the other way.
Is the in to cm conversion exact?
1 inch is exactly 2.54 centimeters. The ratio is fixed by international agreement, so results are exact apart from rounding in the display.