High Quality Content by WIKIPEDIA articles! The kilowatt equal to one thousand watts, is typically used to state the power output of engines and the power consumption of tools and machines. A Kilowatt is approximately equivalent to 1.34 horsepower. AN electric heater with one heating element might use 1 kilowatt. THe average annual electrical energy consumption of a household in the United States is about 8,900 kilowatt-hours, equivalent to an average power of about 1 kW.