9990 kilojoules equals 9.99 megajoules.
Convert 9990 kilojoules into joules, calories, newton meters, foot pounds, watt hours, kilowatt hours, megawatt hours, mega electrons, etc...
Convert 10 megajoules into joules, calories, newton meters, foot pounds, watt hours, kilowatt hours, megawatt hours, mega electrons, etc...