Tons of coal equivalent to gigajoules converter above calculates how many gigajoules are in 'X' tons of coal equivalent (where 'X' is the number of tons of coal equivalent to convert to gigajoules). In order to convert a value from tons of coal equivalent to gigajoules (from TCE to GJ) type the number of TCE to be converted to GJ and then click on the 'convert' button.