This calculator allows you to convert from Attojoule/second to Kilocalorie (IT)/hour and in a reverse direction. To convert from Attojoule/second to Kilocalorie (IT)/hour, enter the amount of Attojoule/second into the first input and to convert from Kilocalorie (IT)/hour to Attojoule/second, enter the amount of Kilocalorie (IT)/hour into the second input.