By Andi Small, Updated Mar 24, 2022
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Power rating is the total electrical power an appliance consumes during normal operation. While manufacturers typically list this figure in the user manual or on the appliance’s information tag, you can determine it yourself if you know the current (amps) and voltage (volts) specifications.
The current rating, expressed in amperes (amps), is found in the user manual, on the transformer, or stamped on the appliance’s sticker.
The voltage rating, measured in volts (V), is located in the same places as the current information.
Multiply the current by the voltage: Power (W) = Current (A) × Voltage (V). The result, expressed in watts, is the appliance’s power rating.
