Nanojoules to kilo-electron volts converter above calculates how many kilo-electron volts are in 'X' nanojoules (where 'X' is the number of nanojoules to convert to kilo-electron volts). In order to convert a value from nanojoules to kilo-electron volts (from nJ to keV) type the number of nJ to be converted to keV and then click on the 'convert' button.