I am on an old mac computer and haven't found a calculator that will work on it nor do I have excel. I am comfortable with percentages and parts. Say you want a 50pg/50vg end result. Your flavoring is suspended in pg do you take that into consideration on your final percentage? How do you tell how much of flavoring is pg or flavor, do the calculators take that into consideration? Just wondering if it is worth it to go find a windows pc to use a calculator?