How to convert electric power in kilowatts (kW) to energy in kilowatt-hour (kWh).

You can calculate kilowatt-hour from kilowatts and hours, but you can't convert kilowatt to kilowatt-hour, since kilowatt and kilowatt-hour units represent different quantities.

The energy E in kilowatt-hour (kWh) is equal to the power P in kilowatts (kW), times the time period t in hours (hr):

*E*_{(kWh)} = *P*_{(kW)}* *×* t*_{(hr)}

So

kilowatt-hour = kilowatt × hour

or

kWh = kW × hr

What is the energy consumption in watt-hour when the power consumption is 5 kilowatts for time duration of 3 hours?

*E* = 5kW × 3h = 15 kWh

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