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What does kWh stand for in energy?kWh, or kilowatt-hour, is another one of the most common measurements used globally, and it is simply a unit of energy. It is the amount or power of kilowatts used per hour of energy usage, and it is equal to 3600 kilojoules.. What is the definition of kWh?kilowatt-hour (kWh) The kilowatt-hour (symbolized kWh) is a unit of energy equivalent to one kilowatt (1 kW) of power expended for one hour (1 h) of time. The kilowatt-hour is not a standard unit in any formal system, but it is commonly used in electrical applications.. How to calculate a kWh?In this case, the total consumption is 6000 watts or 6KWh. Calculate your total KWh by finding the sum of the consumption of all the electrical appliances in your house and how much time you use them. It might be tricky to calculate the exact value.. How much does a kWh cost?How much does 1 kWh per hour cost? The average electricity rate is more than 12 cents per kWh. Residential customers in the US pay an average of 13 cents per kWh for electricity. How much is electricity per kWh UK? The average cost of electricity in the UK in 2020 was 17.2p/kWh. The average price for electricity in the region was 18.4p/kWh .