Centimetres to Inches (cm to in)
1 cm = 0.3937008 in. Multiply centimetres by 0.3937008; the box below does it both ways.
5 cm = 1.9685 in · inches to centimetres page
How to convert centimetres to inches
- Take the value in centimetres.
- Multiply by 0.3937008 (because 1 cm = 0.3937008 in).
- Example: 5 cm × 0.3937008 = 1.9685 in.
- Going back: divide by 0.3937008, or multiply by 2.54.
Where this comes up
An inch is exactly 2.54 cm, so divide centimetres by 2.54. The most common use is screen and paper sizes: a 32-inch TV is 81 cm across the diagonal, A4 paper is 21 × 29.7 cm which is 8.27 × 11.69 in. A quick head estimate: cm ÷ 2.5, then shave a little off (because 2.54 is slightly more than 2.5).
| cm | in |
|---|---|
| 1 | 0.3937 |
| 2 | 0.7874 |
| 2.54 | 1 |
| 5 | 1.9685 |
| 10 | 3.937 |
| 15 | 5.9055 |
| 20 | 7.874 |
| 25 | 9.8425 |
| 30 | 11.811 |
| 40 | 15.748 |
| 50 | 19.685 |
| 60 | 23.622 |
| 100 | 39.3701 |
| 150 | 59.0551 |
Questions people ask
How many inches are in 1 centimetre?
1 cm = 0.3937008 in. To convert, multiply the centimetre value by 0.3937008.
What is 25 cm in in?
25 cm is 9.8425 in.
How do I convert inches back to centimetres?
Divide by 0.3937008, or multiply by 2.54: 1 in = 2.54 cm.
More length conversions
Inches to Centimetres (in to cm) · m to ft · ft to m · cm to ft · ft to cm · mm to in · in to mm · ft to in · in to ft · cm to mm · mm to cm · all converters
Factors are the exact international definitions; last checked 2026-10-10.