Centimeters to inches converter (cm to in)
cm to in converter
Enter a value on either side to convert.
The inch is defined as exactly 2.54 centimeters. Because the definition is exact, every centimeter to inch conversion on this page uses the precise factor with rounding applied only when results are displayed. Type either side of the converter to go in both directions instantly.
The exact factor from centimeters to inches is 0.393700787402. One centimeter equals 0.393700787402 inches, and the converter uses that full precision internally, rounding only what you see to 4 decimal places.
Worked example: 30 cm to in
To convert 30 centimeters to inches, multiply by the exact factor 0.393700787402:
30 × 0.393700787402 = 11.811023622
Rounded to 4 decimal places, 30 cm is 11.811 in.
cm to in conversion table
| cm | in |
|---|---|
| 1 | 0.3937 |
| 2 | 0.7874 |
| 3 | 1.1811 |
| 4 | 1.5748 |
| 5 | 1.9685 |
| 6 | 2.3622 |
| 7 | 2.7559 |
| 8 | 3.1496 |
| 9 | 3.5433 |
| 10 | 3.937 |
| 11 | 4.3307 |
| 12 | 4.7244 |
| 13 | 5.1181 |
| 14 | 5.5118 |
| 15 | 5.9055 |
| 16 | 6.2992 |
| 17 | 6.6929 |
| 18 | 7.0866 |
| 19 | 7.4803 |
| 20 | 7.874 |
| 21 | 8.2677 |
| 22 | 8.6614 |
| 23 | 9.0551 |
| 24 | 9.4488 |
| 25 | 9.8425 |
| 26 | 10.2362 |
| 27 | 10.6299 |
| 28 | 11.0236 |
| 29 | 11.4173 |
| 30 | 11.811 |
| 40 | 15.748 |
| 50 | 19.685 |
| 60 | 23.622 |
| 70 | 27.5591 |
| 80 | 31.4961 |
| 90 | 35.4331 |
| 100 | 39.3701 |
Values are rounded to 4 decimal places with trailing zeros trimmed. Need a value that is not listed? Use the converter at the top of the page.