Inches to Centimetres (in to cm)
1 in = 2.54 cm. Multiply inches by 2.54; the box below does it both ways.
3 in = 7.62 cm · centimetres to inches page
How to convert inches to centimetres
- Take the value in inches.
- Multiply by 2.54 (because 1 in = 2.54 cm).
- Example: 3 in × 2.54 = 7.62 cm.
- Going back: divide by 2.54, or multiply by 0.3937008.
Where this comes up
Multiply inches by 2.54. Clothing and shoe sizes are the usual reason: a 32-inch waist is 81.3 cm, a 42-inch chest is 106.7 cm, and a 10-inch foot is 25.4 cm. Laptop and phone screens are also sold by the inch (diagonal), so a 15.6-inch laptop screen is 39.6 cm corner to corner.
| in | cm |
|---|---|
| 0.5 | 1.27 |
| 1 | 2.54 |
| 2 | 5.08 |
| 3 | 7.62 |
| 4 | 10.16 |
| 5 | 12.7 |
| 6 | 15.24 |
| 8 | 20.32 |
| 10 | 25.4 |
| 12 | 30.48 |
| 15 | 38.1 |
| 20 | 50.8 |
| 24 | 60.96 |
| 36 | 91.44 |
Questions people ask
How many centimetres are in 1 inch?
1 in = 2.54 cm. To convert, multiply the inch value by 2.54.
What is 8 in in cm?
8 in is 20.32 cm.
How do I convert centimetres back to inches?
Divide by 2.54, or multiply by 0.3937008: 1 cm = 0.3937008 in.
More length conversions
Centimetres to Inches (cm to in) · 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.