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Watts, Kilowatts (kW), Kilowatt Hours (kWh) – What is the difference?

April 26, 2017difference kilowatt hours kilowatts kwh watts

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Watts, Kilowatts (kW), Kilowatt Hours (kWh) – What is the difference?

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Watt is the unit of power whereas kilowatt-hour (kWh) is the unit of energy. Watt indicates the rate of using energy in J/s. You can compare this to how fast water is flowing out of a water pipe. If you have a Light bulb that has a rating of 100 watt, it means that the light bulb consumes 100 J per second. kWh is the unit of energy. You can compare this to the volume of water that comes out of the pipe. A 100 watt light bulb when used for an hour will consume 100 Watt-hour of energy which is 0.1 kWh of energy. If you multiply the total energy usage kWh with charge per kWh (This should be on your electricity bill), you get your total Electricity cost.