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