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