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