21.5 mph ≈ 31.5334 ftps. To convert miles per hour to feet per second, multiply by 1.4666679: 21.5 × 1.4666679 = 31.5334.
How to convert miles per hour to feet per second
ftps = mph × 1.4666679
- 1 mph = 1.4666679 ftps (and 1 ftps = 0.68181759 mph).
- Multiply the amount by the factor: 21.5 × 1.4666679 = 31.5334.
- Answer: 21.5 mph ≈ 31.5334 ftps (rounded to 6 significant figures).
Miles Per Hour to Feet Per Second table
| Miles Per Hour (mph) | Feet Per Second (ftps) |
|---|---|
| 21 mph | 30.8 ftps |
| 21.1 mph | 30.9467 ftps |
| 21.2 mph | 31.0934 ftps |
| 21.3 mph | 31.24 ftps |
| 21.4 mph | 31.3867 ftps |
| 21.5 mph | 31.5334 ftps |
| 21.6 mph | 31.68 ftps |
| 21.7 mph | 31.8267 ftps |
| 21.8 mph | 31.9734 ftps |
| 21.9 mph | 32.12 ftps |
| 22 mph | 32.2667 ftps |
| mph | ftps |
|---|---|
| 1 mph | 1.4667 ftps |
| 5 mph | 7.3333 ftps |
| 10 mph | 14.6667 ftps |
| 50 mph | 73.3334 ftps |
| 100 mph | 146.667 ftps |
| 1,000 mph | 1,466.67 ftps |