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500 watts to amps
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4.2 A
500 watts at 120 V · 2.1 A at 240 V
500 watts to amps by voltage
| Voltage | Amps |
|---|---|
| 12 V DC | 41.7 A |
| 24 V DC | 20.8 A |
| 120 V | 4.2 A |
| 208 V | 2.4 A |
| 230 V | 2.2 A |
| 240 V | 2.1 A |
A = W ÷ V (resistive load). Breakers should carry no more than 80% of rating continuously.
FAQ
How many amps is 500 watts?
500 W ÷ 120 V = 4.2 A; at 240 V it is 2.1 A.
Can a 500 W appliance run on a 15 A or 20 A circuit?
At 120 V it draws 4.2 A: fine on a 15 A circuit (12 A continuous limit).
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