Tons of oil equivalent to terawatt hours converter above calculates how many terawatt hours are in 'X' tons of oil equivalent (where 'X' is the number of tons of oil equivalent to convert to terawatt hours). In order to convert a value from tons of oil equivalent to terawatt hours (from TOE to TWh) type the number of TOE to be converted to TWh and then click on the 'convert' button.