电容是系统存储电荷的能力。它是在法拉德(F)中测量的。
1 W/F = 1 V·F 
1 V·F = 1 W/F 
例子: 
将15 瓦特每危险转换为伏特:
15 W/F = 15 V·F 
| 瓦特每危险 | 伏特 | 
|---|---|
| 0.01 W/F | 0.01 V·F | 
| 0.1 W/F | 0.1 V·F | 
| 1 W/F | 1 V·F | 
| 2 W/F | 2 V·F | 
| 3 W/F | 3 V·F | 
| 5 W/F | 5 V·F | 
| 10 W/F | 10 V·F | 
| 20 W/F | 20 V·F | 
| 30 W/F | 30 V·F | 
| 40 W/F | 40 V·F | 
| 50 W/F | 50 V·F | 
| 60 W/F | 60 V·F | 
| 70 W/F | 70 V·F | 
| 80 W/F | 80 V·F | 
| 90 W/F | 90 V·F | 
| 100 W/F | 100 V·F | 
| 250 W/F | 250 V·F | 
| 500 W/F | 500 V·F | 
| 750 W/F | 750 V·F | 
| 1000 W/F | 1,000 V·F | 
| 10000 W/F | 10,000 V·F | 
| 100000 W/F | 100,000 V·F |