Kilocalories per hour to horsepower (boiler) conversion calculator shown above calculates how many horsepower (boiler) are in 'X' kilocalories per hour (where 'X' is the number of kilocalories per hour to convert to horsepower (boiler)). In order to convert a value from kilocalories per hour to horsepower (boiler) (from kcal/h to hp) just type the number of kcal/h to be converted to hp and then click on the 'convert' button.