6420 megajoules equals 1.78 megawatt hours.
Convert 6420 megajoules into joules, kilojoules, calories, newton meters, foot pounds, watt hours, kilowatt hours, mega electrons, etc...
Convert 2 megawatt hours into joules, kilojoules, calories, newton meters, foot pounds, watt hours, kilowatt hours, mega electrons, etc...