21 cm in inches
21 cm is 8.268 inches. That is also 0.689 feet, or 210 mm.
Factors from their legal definitions.
Show the workings
| Step | Sum | Answer |
|---|---|---|
| One centimetre in metres | a hundredth of a metre | 0.01 m |
| One inch in metres | 0.9144 m ÷ 36 | 0.025 m |
| 21 centimetres in metres | 21 × 0.01 | 0.21 m |
| In inches | 0.21 ÷ 0.0254 | 8.268 in |
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
| Centimetres | Inches |
|---|---|
| 16 cm | 6.299 in |
| 17 cm | 6.693 in |
| 18 cm | 7.087 in |
| 19 cm | 7.48 in |
| 20 cm | 7.874 in |
| 21 cm | 8.268 in |
| 22 cm | 8.661 in |
| 23 cm | 9.055 in |
| 24 cm | 9.449 in |
| 25 cm | 9.843 in |
| 26 cm | 10.236 in |
How it works
To convert centimetres to inches, divide by 2.54. Open "Show the workings" above to see this sum step by step.