![]() ![]() To convert watt-hours to watts, simply divide the energy (E) in watt-hours by the time period (t) in hours (h). If an air conditioner has a rating of 1,000 watts and is used for 4 hours in one day then it consumes 4,000 watt-hours in that period. ![]() Hence, watt-hour is simply watts times hours. The energy (E) in watt-hour (Wh) is equal to the power (P) in watts multiplied by the time period (t) in hours (h). In order to calculate the number of watt-hours consumed per device, determine the wattage rating and multiply it by the time used per day. This is approximately equal to 4.01e+15 watt-hours (Wh). Terawatt-hours may also be used for larger entities such as business establishments or in measuring consumption for the country as a whole.įor example, electricity consumption in the United States reached a total of 4,010 terawatt-hours in 2022. While watt is considered the SI unit of power, energy consumption is usually measured in kilowatt-hours for a typical household since most appliances consume more energy. In short, watts measure power while watt-hours measure energy. It indicates how many watts are used in one hour. It calculates the total energy consumed by an electrical device or appliance over a period of time. ![]() Watt-hour, on the other hand, measures the amount of work generated by an appliance. It is equivalent to the electricity flowing at a rate of one joule per second. Watt refers to the amount of energy a device needs in order to function. Watt vs Watt-HourĪ watt is a unit of power, while a watt-hour is a unit of energy. It is equal to the rate of energy conversion of 1 watt operating for one hour. Watt-hour (Wh) is a unit of energy equal to 3,600 joules. ![]()
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