Converter
Inches to Centimetres
1 in is 2.54 cm. Type any amount below and the answer follows as you type, on your device.
The answer follows what you type, rounded to six significant figures. Nothing is sent anywhere.
The formula
cm = in × 2.54
Multiply the inch figure by 2.54.
Worked example
How many centimetres are in 5 inches?
5 in → 12.7 cm
Multiply 5 by 2.54. The answer is 12.7 cm.
Quick reference
The common values, rounded to six significant figures.
| inches (in) | centimetres (cm) |
|---|---|
| 1 | 2.54 |
| 2 | 5.08 |
| 5 | 12.7 |
| 10 | 25.4 |
| 20 | 50.8 |
| 32 | 81.28 |
| 55 | 139.7 |
When you need this
A television, a tyre or a piece of furniture advertised in inches needs converting before it can be compared with anything measured locally, and an inch is exactly 2.54 centimetres.
The factor above is the exact legal definition of each unit, not a rounded one, so the answers stay right at any size. Nothing here is sent to a server: the conversion runs in the page.