8420 megajoules equals 6,210,263,899.34 foot pounds.
Convert 8420 megajoules into joules, kilojoules, calories, newton meters, watt hours, kilowatt hours, megawatt hours, mega electrons, etc...
Convert 6210263900 foot pounds into joules, kilojoules, calories, newton meters, watt hours, kilowatt hours, megawatt hours, mega electrons, etc...