How to use the Volts to Watts Calculator
The Formula
Power (watts) = voltage (volts) × current (amps): W = V × A. Example: 120 V at 15 A is 1,800 W.
Practical Example
Size breakers, estimate heat output, or compare loads before using the Energy Consumption calculator for kWh over time.
About Volts to Watts Calculator
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.