Terawatt hours to tons of coal equivalent conversion calculator shown above calculates how many tons of coal equivalent are in 'X' terawatt hours (where 'X' is the number of terawatt hours to convert to tons of coal equivalent). In order to convert a value from terawatt hours to tons of coal equivalent (from TWh to TCE) simply type the number of TWh to be converted to TCE and then click on the 'convert' button.