Centimetres to inches
Type a value in either box. 1 cm = 0.393701 in.
Last updated
How to convert
To convert centimetres to inches, divide by 2.54 (or multiply by 0.393701).
in = cm × 0.393701
For example: 25 cm ÷ 2.54 = 9.8425 in.
An inch is defined as exactly 2.54 centimetres (since 1959).
In your head: Divide by 2.5: 10 cm ≈ 4 in (exactly 3.94 in), about 2% high.
When you’ll need it
Clothing, screen and children’s heights are often given in centimetres in the UK and Europe but in inches in the US. A 30 cm ruler is just under 12 inches.
Common values
| Centimetres (cm) | Inches (in) |
|---|---|
| 1 cm | 0.3937 in |
| 2 cm | 0.7874 in |
| 5 cm | 1.9685 in |
| 10 cm | 3.937 in |
| 15 cm | 5.9055 in |
| 20 cm | 7.874 in |
| 25 cm | 9.8425 in |
| 30 cm | 11.811 in |
| 50 cm | 19.685 in |
| 100 cm | 39.3701 in |
| 150 cm | 59.0551 in |
| 180 cm | 70.8661 in |
Questions
- How many centimetres make an inch?
- 1 inch is 2.54 centimetres, so 1 centimetre = 0.393701 inches.
- What is the formula to convert centimetres to inches?
- in = cm × 0.393701. An inch is defined as exactly 2.54 centimetres (since 1959).
- What is 25 centimetres in inches?
- 25 centimetres is 9.8425 inches.