Centimeters to Inches
Convert centimeters to inches instantly. The formula is in = cm × 0.39370079, and the reference table below covers the values people look up most.
1 cm equals
0.3937 in
Formula
One inch is defined as exactly 2.54 centimeters, so this conversion is exact rather than approximate.
Centimeters to Inches table
| Centimeters | Inches |
|---|---|
| 1 cm | 0.3937 in |
| 2 cm | 0.7874 in |
| 3 cm | 1.1811 in |
| 5 cm | 1.9685 in |
| 10 cm | 3.9370 in |
| 15 cm | 5.9055 in |
| 20 cm | 7.8740 in |
| 25 cm | 9.8425 in |
| 30 cm | 11.8110 in |
| 50 cm | 19.6850 in |
| 100 cm | 39.3701 in |
Frequently asked questions
How many inches are in a centimeter?
One centimeter equals 0.3937 inches. One inch is defined as exactly 2.54 centimeters, so this conversion is exact rather than approximate.
What is the formula to convert centimeters to inches?
in = cm × 0.39370079. Enter any value above and the result updates as you type, with no rounding until the final display.
How do I convert inches back to centimeters?
Use the reverse conversion: divide instead of multiplying, or open the inches to centimeters page for the same tool the other way round.
Is this centimeters to inches conversion exact?
The underlying factor is the internationally defined one, so the only rounding happens when the result is displayed. The table below shows values rounded to 4 decimal places.