12 inches in cm
12 inches is 30.48 cm. That is also 304.8 mm, or 0.3048 metres, or 1 ft.
Factors from their legal definitions.
Show the workings
| Step | Sum | Answer |
|---|---|---|
| One inch in metres | 0.9144 m ÷ 36 | 0.025 m |
| One centimetre in metres | a hundredth of a metre | 0.01 m |
| 12 inches in metres | 12 × 0.0254 | 0.305 m |
| In centimetres | 0.3048 ÷ 0.01 | 30.48 cm |
Where the figures come from
- A yard in metres: 0.914 m per yard. Source: Weights and Measures Act 1985, Schedule 1. Checked 13 November 2026.
- Inches in a yard: 36 inches per yard. Source: Weights and Measures Act 1985, Schedule 1. Checked 13 November 2026.
Nearby values
| Inches | Centimetres |
|---|---|
| 7 inches | 17.78 cm |
| 8 inches | 20.32 cm |
| 9 inches | 22.86 cm |
| 10 inches | 25.4 cm |
| 11 inches | 27.94 cm |
| 12 inches | 30.48 cm |
| 13 inches | 33.02 cm |
| 14 inches | 35.56 cm |
| 15 inches | 38.1 cm |
| 16 inches | 40.64 cm |
| 17 inches | 43.18 cm |
How it works
To convert inches to centimetres, multiply by 2.54. Open "Show the workings" above to see this sum step by step.