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 A·s/V 
1 A·s/V = 1 W/F 
例子: 
将15 瓦特每危险转换为每伏的安培第二:
15 W/F = 15 A·s/V 
| 瓦特每危险 | 每伏的安培第二 | 
|---|---|
| 0.01 W/F | 0.01 A·s/V | 
| 0.1 W/F | 0.1 A·s/V | 
| 1 W/F | 1 A·s/V | 
| 2 W/F | 2 A·s/V | 
| 3 W/F | 3 A·s/V | 
| 5 W/F | 5 A·s/V | 
| 10 W/F | 10 A·s/V | 
| 20 W/F | 20 A·s/V | 
| 30 W/F | 30 A·s/V | 
| 40 W/F | 40 A·s/V | 
| 50 W/F | 50 A·s/V | 
| 60 W/F | 60 A·s/V | 
| 70 W/F | 70 A·s/V | 
| 80 W/F | 80 A·s/V | 
| 90 W/F | 90 A·s/V | 
| 100 W/F | 100 A·s/V | 
| 250 W/F | 250 A·s/V | 
| 500 W/F | 500 A·s/V | 
| 750 W/F | 750 A·s/V | 
| 1000 W/F | 1,000 A·s/V | 
| 10000 W/F | 10,000 A·s/V | 
| 100000 W/F | 100,000 A·s/V |