21 ft in metres
21 ft is 6.401 metres. That is also 640.08 cm, or 7 yards.
Factors from their legal definitions.
Show the workings
| Step | Sum | Answer |
|---|---|---|
| One foot in metres | 0.9144 m ÷ 3 | 0.305 m |
| In metres | 21 × 0.3048 | 6.401 m |
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.
- Feet in a yard: 3 feet per yard. Source: Weights and Measures Act 1985, Schedule 1. Checked 13 November 2026.
Nearby values
| Feet | Metres |
|---|---|
| 16 ft | 4.877 m |
| 17 ft | 5.182 m |
| 18 ft | 5.486 m |
| 19 ft | 5.791 m |
| 20 ft | 6.096 m |
| 21 ft | 6.401 m |
| 22 ft | 6.706 m |
| 23 ft | 7.01 m |
| 24 ft | 7.315 m |
| 25 ft | 7.62 m |
| 26 ft | 7.925 m |
How it works
To convert feet to metres, multiply by 0.3048. Open "Show the workings" above to see this sum step by step.