6440 foot pounds equals 2.09 calories.
Convert 6440 foot pounds into joules, kilojoules, megajoules, newton meters, watt hours, kilowatt hours, megawatt hours, mega electrons, etc...
Convert 3 calories into joules, kilojoules, megajoules, newton meters, watt hours, kilowatt hours, megawatt hours, mega electrons, etc...