能量是执行工作的能力。它以各种形式存在，例如动力学，电势，热等。在焦耳（J）中测量。
1 cal = 3.086 ft·lb
1 ft·lb = 0.324 cal
例子:
将15 卡路里转换为脚：
15 cal = 46.289 ft·lb
| 卡路里 | 脚 |
|---|---|
| 0.01 cal | 0.031 ft·lb |
| 0.1 cal | 0.309 ft·lb |
| 1 cal | 3.086 ft·lb |
| 2 cal | 6.172 ft·lb |
| 3 cal | 9.258 ft·lb |
| 5 cal | 15.43 ft·lb |
| 10 cal | 30.86 ft·lb |
| 20 cal | 61.719 ft·lb |
| 30 cal | 92.579 ft·lb |
| 40 cal | 123.438 ft·lb |
| 50 cal | 154.298 ft·lb |
| 60 cal | 185.157 ft·lb |
| 70 cal | 216.017 ft·lb |
| 80 cal | 246.876 ft·lb |
| 90 cal | 277.736 ft·lb |
| 100 cal | 308.596 ft·lb |
| 250 cal | 771.489 ft·lb |
| 500 cal | 1,542.978 ft·lb |
| 750 cal | 2,314.467 ft·lb |
| 1000 cal | 3,085.955 ft·lb |
| 10000 cal | 30,859.554 ft·lb |
| 100000 cal | 308,595.536 ft·lb |
规则