Packaging Calculator - The Free Calculator For Packaging Engineers Packaging Calculator was created by Sanford Fitelson. Sanford is a Packaging Engineer who has been using spreadsheet formulas for years to perform everyday calculations and decided that perhaps others would find these useful. While the calculations are simple enough, the time spent performing them repeatedly seemed wasteful so the decision was made to automate them. The website is the result and there are many ideas in the works to make it even more useful.