速度是相对于参考框架的对象位置的变化速率。它以每次距离的单位（例如每秒米（m/s））进行测量。
1 km/h² = 0.253 ft/s
1 ft/s = 3.95 km/h²
例子:
将15 每小时平方转换为每秒脚：
15 km/h² = 3.797 ft/s
| 每小时平方 | 每秒脚 |
|---|---|
| 0.01 km/h² | 0.003 ft/s |
| 0.1 km/h² | 0.025 ft/s |
| 1 km/h² | 0.253 ft/s |
| 2 km/h² | 0.506 ft/s |
| 3 km/h² | 0.759 ft/s |
| 5 km/h² | 1.266 ft/s |
| 10 km/h² | 2.531 ft/s |
| 20 km/h² | 5.063 ft/s |
| 30 km/h² | 7.594 ft/s |
| 40 km/h² | 10.126 ft/s |
| 50 km/h² | 12.657 ft/s |
| 60 km/h² | 15.189 ft/s |
| 70 km/h² | 17.72 ft/s |
| 80 km/h² | 20.252 ft/s |
| 90 km/h² | 22.783 ft/s |
| 100 km/h² | 25.315 ft/s |
| 250 km/h² | 63.287 ft/s |
| 500 km/h² | 126.575 ft/s |
| 750 km/h² | 189.862 ft/s |
| 1000 km/h² | 253.15 ft/s |
| 10000 km/h² | 2,531.496 ft/s |
| 100000 km/h² | 25,314.961 ft/s |
规则