Electrical power is measured in which of the following units?

Electrical power is the rate at which electrical energy is used, transferred, or generated. In the International System of Units (SI), power is always measured in Watts. In a basic direct current (DC) circuit, you can calculate power in Watts by multiplying voltage (Volts) by current (Amperes). A very common point of confusion is the difference between Watts and Watt-hours. Watts measure the instantaneous rate of power being used right now, while Watt-hours measure the total energy consumed over a period of time (which is what your home electricity bill charges you for).