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 kcal = 3,085.955 ft·lb
1 ft·lb = 0 kcal
例子:
将15 千瓦利转换为脚：
15 kcal = 46,289.33 ft·lb
| 千瓦利 | 脚 |
|---|---|
| 0.01 kcal | 30.86 ft·lb |
| 0.1 kcal | 308.596 ft·lb |
| 1 kcal | 3,085.955 ft·lb |
| 2 kcal | 6,171.911 ft·lb |
| 3 kcal | 9,257.866 ft·lb |
| 5 kcal | 15,429.777 ft·lb |
| 10 kcal | 30,859.554 ft·lb |
| 20 kcal | 61,719.107 ft·lb |
| 30 kcal | 92,578.661 ft·lb |
| 40 kcal | 123,438.215 ft·lb |
| 50 kcal | 154,297.768 ft·lb |
| 60 kcal | 185,157.322 ft·lb |
| 70 kcal | 216,016.875 ft·lb |
| 80 kcal | 246,876.429 ft·lb |
| 90 kcal | 277,735.983 ft·lb |
| 100 kcal | 308,595.536 ft·lb |
| 250 kcal | 771,488.841 ft·lb |
| 500 kcal | 1,542,977.681 ft·lb |
| 750 kcal | 2,314,466.522 ft·lb |
| 1000 kcal | 3,085,955.363 ft·lb |
| 10000 kcal | 30,859,553.628 ft·lb |
| 100000 kcal | 308,595,536.281 ft·lb |
规则