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 tf = 7,233.003 ft·lbf
1 ft·lbf = 0 tf
例子:
将15 吨转换为脚击力：
15 tf = 108,495.044 ft·lbf
| 吨 | 脚击力 |
|---|---|
| 0.01 tf | 72.33 ft·lbf |
| 0.1 tf | 723.3 ft·lbf |
| 1 tf | 7,233.003 ft·lbf |
| 2 tf | 14,466.006 ft·lbf |
| 3 tf | 21,699.009 ft·lbf |
| 5 tf | 36,165.015 ft·lbf |
| 10 tf | 72,330.029 ft·lbf |
| 20 tf | 144,660.058 ft·lbf |
| 30 tf | 216,990.087 ft·lbf |
| 40 tf | 289,320.116 ft·lbf |
| 50 tf | 361,650.145 ft·lbf |
| 60 tf | 433,980.174 ft·lbf |
| 70 tf | 506,310.203 ft·lbf |
| 80 tf | 578,640.232 ft·lbf |
| 90 tf | 650,970.262 ft·lbf |
| 100 tf | 723,300.291 ft·lbf |
| 250 tf | 1,808,250.726 ft·lbf |
| 500 tf | 3,616,501.453 ft·lbf |
| 750 tf | 5,424,752.179 ft·lbf |
| 1000 tf | 7,233,002.906 ft·lbf |
| 10000 tf | 72,330,029.06 ft·lbf |
| 100000 tf | 723,300,290.599 ft·lbf |
规则