Electron volts to mega-electron volts conversion calculator shown above calculates how many mega-electron volts are in 'X' electron volts (where 'X' is the number of electron volts to convert to mega-electron volts). In order to convert a value from electron volts to mega-electron volts (from eV to MeV) simply type the number of eV to be converted to MeV and then click on the 'convert' button.