6421 kilojoules equals 6.42 megajoules.
Convert 6421 kilojoules into joules, calories, newton meters, foot pounds, watt hours, kilowatt hours, megawatt hours, mega electrons, etc...
Convert 7 megajoules into joules, calories, newton meters, foot pounds, watt hours, kilowatt hours, megawatt hours, mega electrons, etc...