Kilowatt hour
Symbol: kWh
The standard unit of energy in the International System of Units (SI) is the joule (J), equal to one watt second. Inversely, one watt is equal to 1 J/s. One kilowatt hour is 3.6 megajoules, which is the amount of energy expended (or dissipated) if work is done at a constant rate of one thousand watts for one hour.
One kilowatt hour is equal to 3,600,000 Joule and vice versa 1 Joule is approximately 0.00000027778 kilowatt hours.