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