Ergs to giga-electron volts conversion calculator shown above calculates how many giga-electron volts are in 'X' ergs (where 'X' is the number of ergs to convert to giga-electron volts). In order to convert a value from ergs to giga-electron volts (from erg to GeV) type the number of erg to be converted to GeV and then click on the 'convert' button.