40 megajoules equals 40,000,000 joules.
Convert 40 megajoules into kilojoules, calories, newton meters, foot pounds, watt hours, kilowatt hours, megawatt hours, mega electrons, etc...
Convert 40000000 joules into kilojoules, calories, newton meters, foot pounds, watt hours, kilowatt hours, megawatt hours, mega electrons, etc...