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