Convert centimeters to inches instantly. Enter any cm value to get the exact inch equivalent, plus the formula and a full reference table.
The conversion factor is derived from SI base values:
Dividing by 2.54 and multiplying by 0.393701 are equivalent operations.
| Centimeters (cm) | Inches (in) |
|---|---|
| 1 cm | 0.3937 in |
| 2.5 cm | 0.9843 in |
| 5 cm | 1.9685 in |
| 10 cm | 3.9370 in |
| 15 cm | 5.9055 in |
| 20 cm | 7.8740 in |
| 30 cm | 11.811 in |
| 50 cm | 19.685 in |
| 100 cm | 39.370 in |
| 200 cm | 78.740 in |
100 cm equals approximately 39.37 inches. Divide by 2.54 to convert: 100 ÷ 2.54 = 39.3701 in.
170 cm is approximately 66.93 inches, which is 5 feet 6.93 inches (commonly written as 5'7").
Approximately. The exact value is 1 cm = 0.393701 in. Saying "about 0.4 in" is a common rough estimate with less than 2% error.
Divide cm by 30.48 to get feet. Take the decimal part and multiply by 12 to get inches. Example: 180 cm ÷ 30.48 = 5.906 ft → 5 ft + (0.906 × 12) = 5 ft 10.87 in.
The centimeter is exactly one-hundredth of a meter. The word comes from the Latin centum (hundred) and the Greek metron (measure). It was introduced as part of the metric system during the French Revolution.