Kilowatt hours to kilojoules converter above calculates how many kilojoules are in 'X' kilowatt hours (where 'X' is the number of kilowatt hours to convert to kilojoules). In order to convert a value from kilowatt hours to kilojoules (from kWh to kJ) simply type the number of kWh to be converted to kJ and then click on the 'convert' button.