1. The Cost of Electrical Energy

2. A kilowatt-hour is equivalent to the use of one kilowatt in one hour.
The electrical energy consumption for a household is equal to the amount of electrical energy used, usually measured in kilowatt-hours.
A kilowatt-hour is equivalent to the use of one kilowatt in one hour.
One kilowatt (kW) equals 1000 watts (W).
A watt is equal to one joule (unit of energy) per second.

3. Example:
If the energy (E) used by a microwave is 0.8 kW and the microwave is turned on for half an hour, the electrical energy used is:
E = 0.8 kW x 0.5 h
= 0.4 kW ● h

4. SaskPower charges
$0.1374/kW●h
In the microwave example, the consumption of 0.4 kW●h at a cost of cents per kW●h =
0.4 x = 5.5 cents!