How to convert electric power in watts (W) to energy in kilowatt-hour (kWh).
You can calculate kilowatt-hour from watts and hours. You can't convert watt to kilowatt-hour unit since watt and kilowatt-hour unit represent different quantities.
So The energy E in kilowatt-hour (kWh) is equal to the power P in watts (W), times the time period t in hours (hr) divided by 1000.
E(kWh) = P(W) × t(hr) / 1000
So
kilowatt-hour = watt × hour / 1000
or
kWh = W × hr / 1000
What is the energy consumption in watt-hour when the power consumption is 3000 watts for time duration of 3 hours?
E = 3000W × 3h / 1000 = 9 kWh
What is the energy consumption in watt-hour when the power consumption is 4000 watts for time duration of 3 hours?
E = 4000W × 3h / 1000 = 12 kWh
What is the energy consumption in watt-hour when the power consumption is 7000 watts for time duration of 3 hours?
E = 7000W × 3h / 1000 = 21 kWh
What is the energy consumption in watt-hour when the power consumption is 10000 watts for time duration of 3 hours?
E = 10000W × 3h / 1000 = 30 kWh
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