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