Convert voltage to power
| 120V @ | Watts |
|---|---|
| 1 A | 120 W |
| 5 A | 600 W |
| 10 A | 1200 W |
| 15 A | 1800 W |
Voltage (volts) and power (watts) measure different electrical properties. To convert between them, you need either current (amps) or resistance (ohms).
If you know the current, use P = V × I. A 120V circuit drawing 10 amps provides 1200 watts of power.
If you know the resistance, use P = V²/R. A 120V supply across a 10Ω resistor produces 1440 watts.
You need either current (amps) or resistance (ohms). With current: Watts = Volts × Amps. With resistance: Watts = Volts² ÷ Ohms. You cannot convert volts to watts directly.
No. Volts measure electrical potential (pressure), while watts measure power (rate of energy use). They're related through current or resistance. A 120V outlet could power anything from 0 to 1800+ watts depending on the load.
It depends on the current draw. 120V at 1A = 120W. At 10A = 1200W. At 15A (typical circuit max) = 1800W. The formula is: Watts = 120 × Amps.
Watts = Volts × Amps. This is Watt's Law. Think of volts as pressure, amps as flow rate, and watts as the total power being delivered. Higher voltage or current means more power.