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