Tera-electron volts to gigajoules converter above calculates how many gigajoules are in 'X' tera-electron volts (where 'X' is the number of tera-electron volts to convert to gigajoules). In order to convert a value from tera-electron volts to gigajoules (from TeV to GJ) type the number of TeV to be converted to GJ and then click on the 'convert' button.