Convert amps to watts at any voltage. Instant answer with the W = A × V formula and real appliance examples.
| Input | Result |
|---|---|
| 15 A at 120 V | 1800 W |
| 15 A at 240 V | 3600 W |
| 5 A at 230 V | 1150 W |
Multiply amps by volts: W = A × V. A 15 A circuit at 120 V supplies 1800 W — which is why that is the practical ceiling for a US kitchen counter circuit.
15 A × 120 V = 1800 W; 15 A × 240 V = 3600 W. Check your voltage first — the answer doubles at 240 V.
For motors and electronics, watts = volts × amps × PF. With PF 0.8, 15 A at 120 V delivers 1440 W of real power.