21 megajoules equals 5,019.12 calories.
Convert 21 megajoules into joules, kilojoules, newton meters, foot pounds, watt hours, kilowatt hours, megawatt hours, mega electrons, etc...
Convert 5020 calories into joules, kilojoules, newton meters, foot pounds, watt hours, kilowatt hours, megawatt hours, mega electrons, etc...