Volts to watts formula
Power (watts) = voltage (volts) × current (amps): W = V × A. Example: 120 V at 15 A is 1,800 W.
Practical uses
Size breakers, estimate heat output, or compare loads before using the Energy Consumption calculator for kWh over time.
Frequently asked questions
Q: Is this for DC or AC? A: The formula W = V × A works for both; AC real power also depends on power factor for non-resistive loads.