About converting inches to centimetres
Multiply by 2.54. The inch has been defined as exactly 0.0254 metres since 1959, so this is one of the few conversions between measurement systems that involves no rounding at all.
The values below cover the sizes that come up most: screen diagonals, waist measurements, timber lengths and paper sizes are all quoted in inches in some countries and centimetres in others.
Inch to Centimetre reference table
| Inch | Centimetre |
|---|---|
| 1 in | 2.54 cm |
| 2 in | 5.08 cm |
| 3 in | 7.62 cm |
| 4 in | 10.16 cm |
| 5 in | 12.7 cm |
| 6 in | 15.24 cm |
| 8 in | 20.32 cm |
| 10 in | 25.4 cm |
| 12 in | 30.48 cm |
| 18 in | 45.72 cm |
| 24 in | 60.96 cm |
| 30 in | 76.2 cm |
| 36 in | 91.44 cm |
| 48 in | 121.92 cm |
| 60 in | 152.4 cm |
| 72 in | 182.88 cm |
Frequently asked questions
- How many centimetres is 12 inches?
- Exactly 30.48 cm. A foot is twelve inches, so this is also the length of a foot in centimetres.
- How do I convert a height like 5 foot 9?
- Turn it into inches first - 5 × 12 + 9 = 69 inches - then multiply by 2.54, which gives 175.26 cm.
- Is anything I enter sent anywhere?
- No. The conversion runs inside your browser. Nothing you type is uploaded, stored or logged, and the page keeps working with the network disconnected.
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