4221 watt hours equals 3,631.84 calories.
Convert 4221 watt hours into joules, kilojoules, megajoules, newton meters, foot pounds, kilowatt hours, megawatt hours, mega electrons, etc...
Convert 3632 calories into joules, kilojoules, megajoules, newton meters, foot pounds, kilowatt hours, megawatt hours, mega electrons, etc...