Kilocalories per day to ergs per second converter on this page calculates how many ergs per second are in 'X' kilocalories per day (where 'X' is the number of kilocalories per day to convert to ergs per second). In order to convert a value from kilocalories per day to ergs per second (from kcal/d to erg/s) simply type the number of kcal/d to be converted to erg/s and then click on the 'convert' button.