4221 megajoules equals 1,172,500 watt hours.
Convert 4221 megajoules into joules, kilojoules, calories, newton meters, foot pounds, kilowatt hours, megawatt hours, mega electrons, etc...
Convert 1172500 watt hours into joules, kilojoules, calories, newton meters, foot pounds, kilowatt hours, megawatt hours, mega electrons, etc...