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