length conversion
Convert Centimeters to Inches
One centimeter equals 0.3937 inches. Enter any value below for an exact conversion.
How to convert Centimeters to Inches
- Type the number of centimeters into the first field.
- The equivalent in inches appears immediately.
- Swap the units to convert in the opposite direction.
Centimeters to Inches formula
in = cm × 0.3937
Worked example: to convert 12 cm, multiply 12 × 0.3937 = 4.7244 in.
This conversion factor is exact by international definition rather than measured, so the only rounding is whatever you apply to the final answer.
Centimeters to Inches conversion table
| Centimeters | Inches |
|---|---|
| 1 cm | 0.3937 in |
| 2 cm | 0.7874 in |
| 5 cm | 1.9685 in |
| 10 cm | 3.937 in |
| 25 cm | 9.8425 in |
| 50 cm | 19.685 in |
| 100 cm | 39.3701 in |
What is a centimeter?
One hundredth of a meter. The default unit for human height and clothing measurements outside the United States.
What is a inch?
Defined as exactly 25.4 millimeters since 1959. Screen sizes, pipe diameters and paper stock are quoted in inches worldwide, regardless of local measurement system.
Frequently asked questions
How many inches are in a centimeter?
One centimeter is 0.3937 inches.
How do I convert centimeters to inches in my head?
Divide by 2.5, then add 1% back. 180 cm → 72 − 1.1 = 70.9 in.
Is the conversion exact?
Yes. Both units are defined in terms of each other by international agreement, so the factor 0.3937 is exact rather than approximate.
How many centimeters is 100 in?
100 in is 254 cm.
Which countries use inches?
The United States, and internationally for screen sizes, pipe fittings, wheel diameters and paper stock regardless of local system.
Is my data uploaded to convert it?
No. The arithmetic runs in your browser. Nothing is sent anywhere.