15 Amps to Watts
15 Amps equals 1,800W at 120V or 3,600W at 240V. Common loads: Standard 15A circuit max, space heater, microwave.
15 Amps to Watts
3,600 W @240V
120V
1,800W
208V
3,120W
240V
3,600W
277V
4,155W
480V
7,200W
The Formula
Watts = Amps × Volts. For 15 Amps at 240V: 15 × 240 = 3,600W.
Amps to Watts at Every Voltage
| Voltage | Watts | kW |
|---|---|---|
| 120V | 1,800W | 1.8 kW |
| 208V | 3,120W | 3.1 kW |
| 240V | 3,600W | 3.6 kW |
| 277V | 4,155W | 4.2 kW |
| 480V | 7,200W | 7.2 kW |
Common 15A Loads
Standard 15A circuit max, space heater, microwave. Always check nameplate ratings.
Disclaimer: For reference only. Consult a licensed electrician.