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