Cost of electrical energy

Energy is measured in:

Energy is measured in:

Joules (J)

Time is measured in:

Seconds (s)

Power is measured in:

Watts (W)

Energy formula:

Energy= power x time

Cost formula:

Cost= power x time x unit price

Price for particular appliance:

Cost= power rating of appliance x number of hours it was used for x unit price of electricity.