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