There is an on-line dosing calculator that makes it easier to determine the required amount of pancrealipase based on meal ingredients and the quantities. It does not yet list ZenPep so using the closest dosage to the Creon dosages in the menu will be equivalent.
http://digestthis.ca
Once I figured out the number of capsules for each meal, weight gain was much easier. Now I have to actually watch my weight in not gaining any more to maintain my BMI.