cm to inches
1 centimeter equals 0.393701 inches. Formula: inches = centimeters ÷ 2.54.
= 66.9291 in
Other direction: inches to cm
Formula
inches = centimeters ÷ 2.54
Example: 170 cm = 66.9291 in.
When you need cm to inches
Centimeter-to-inch conversion comes up whenever European or Asian measurements meet US ones: checking whether furniture from a European shop fits a room measured in inches, reading clothing size charts, or translating your height for a US form. A height of 170 cm, for example, is just under 67 inches — about 5 feet 7.
Sewing patterns, picture frames, and monitor bezels are also commonly listed in centimeters. Because an inch is defined as exactly 2.54 cm, dividing by 2.54 always gives the exact answer — the values in the chart below are rounded for readability.
Common cm to in values
| Centimeters (cm) | Inches (in) |
|---|---|
| 1 | 0.393701 |
| 2 | 0.787402 |
| 5 | 1.9685 |
| 10 | 3.937 |
| 15 | 5.9055 |
| 20 | 7.874 |
| 25 | 9.8425 |
| 30 | 11.811 |
| 40 | 15.748 |
| 50 | 19.685 |
| 100 | 39.3701 |
| 170 | 66.9291 |
FAQ
How many inches is 1 cm?
1 centimeter equals about 0.3937 inches. The inch is defined as exactly 2.54 cm, so to convert centimeters to inches you divide by 2.54.
Is 30 cm the same as 12 inches (one foot)?
Not exactly. 30 cm is about 11.81 inches, slightly short of a foot. One foot (12 inches) is exactly 30.48 cm.