力是一种相互作用，当没有反对时，会改变对象的运动。它是在纽顿（N）中测量的。
1 ft·lbf = 1.356 N
1 N = 0.738 ft·lbf
例子:
将15 脚击力转换为牛顿：
15 ft·lbf = 20.337 N
| 脚击力 | 牛顿 |
|---|---|
| 0.01 ft·lbf | 0.014 N |
| 0.1 ft·lbf | 0.136 N |
| 1 ft·lbf | 1.356 N |
| 2 ft·lbf | 2.712 N |
| 3 ft·lbf | 4.067 N |
| 5 ft·lbf | 6.779 N |
| 10 ft·lbf | 13.558 N |
| 20 ft·lbf | 27.116 N |
| 30 ft·lbf | 40.675 N |
| 40 ft·lbf | 54.233 N |
| 50 ft·lbf | 67.791 N |
| 60 ft·lbf | 81.349 N |
| 70 ft·lbf | 94.907 N |
| 80 ft·lbf | 108.466 N |
| 90 ft·lbf | 122.024 N |
| 100 ft·lbf | 135.582 N |
| 250 ft·lbf | 338.955 N |
| 500 ft·lbf | 677.91 N |
| 750 ft·lbf | 1,016.865 N |
| 1000 ft·lbf | 1,355.82 N |
| 10000 ft·lbf | 13,558.2 N |
| 100000 ft·lbf | 135,582 N |
规则