This free length converter changes centimetres (cm) into inches (in) and back, instantly and in your browser. It is one of the most common metric-to-imperial conversions — used for screen sizes, height, paper, fabric and DIY — because one system is metric and the other imperial.
How it works
An inch is defined as exactly 2.54 centimetres, so the conversion factor between them is fixed. To convert centimetres to inches you divide by 2.54 (equivalently, multiply by 0.3937007874); to go the other way you multiply by 2.54:
inches = centimetres × 0.3937007874 · centimetres = inches × 2.54
Because the inch’s definition is exact, the conversion is exact too, with the displayed result rounded for readability.
Example
Convert 10 cm to inches:
10 × 0.3937007874 = 3.937 in
The reference table below shows common conversion values at a glance. All calculations run entirely in your browser with no data sent to any server.
| Centimetres (cm) | Inches (in) |
|---|---|
| 1 cm | 0.393701 in |
| 5 cm | 1.9685 in |
| 10 cm | 3.937 in |
| 100 cm | 39.3701 in |