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