Giga-electron volts to terajoules converter above calculates how many terajoules are in 'X' giga-electron volts (where 'X' is the number of giga-electron volts to convert to terajoules). In order to convert a value from giga-electron volts to terajoules (from GeV to TJ) just type the number of GeV to be converted to TJ and then click on the 'convert' button.