Unit Converter › Guides › Centimeters to Inches (cm to in)
Convert centimeters to inches with the exact factor defined by NIST (2.54), a ready table and worked examples.
One inch is exactly 2.54 cm, so a centimeter is 1/2.54 inch (about 0.393701 in).
Inches = Centimeters ÷ 2.54. To convert centimeters to inches, divide by 2.54.
| Centimeters | Inches |
|---|---|
| 1 | 0.39 |
| 2 | 0.79 |
| 5 | 1.97 |
| 10 | 3.94 |
| 15 | 5.91 |
| 20 | 7.87 |
| 25 | 9.84 |
| 30 | 11.81 |
| 40 | 15.75 |
| 50 | 19.69 |
| 60 | 23.62 |
| 70 | 27.56 |
| 80 | 31.5 |
| 90 | 35.43 |
| 100 | 39.37 |
| 150 | 59.06 |
| 160 | 62.99 |
| 170 | 66.93 |
| 180 | 70.87 |
| 190 | 74.8 |
Values are rounded to 2 decimal places for display. The factor itself is exact, so any rounding comes only from the last digit shown.
A height of 180 cm: 180 ÷ 2.54 = 70.87 in, or 5 ft 10.87 in. A 30 cm ruler is 11.81 in.
Divide by 2.54 to get inches, then divide by 12. The whole number is feet and the remainder is inches. For example, 170 cm = 66.93 in = 5 ft 6.93 in.
Last checked: 29 October 2026.