In solidifying a recipe for my Papa Poppers, I did the math on a 5lb bag of medium/small russet potatoes.
* I weighed the potatoes, out of the bag. 82.65oz. This is 2.65 ounces more than 80oz…which is 5lbs. This is understandable. I imagine that at the potato packing plant, the scales are set for 80oz, and if the load is at 79.9999oz, the computers measuring the lot weight will allow an additional potato into the load to hit the 80oz. mark…the overage acceptable.
* After peeling, I was left with 13.94oz of peel (that’s nearly a pound), and 68.71oz of potato. So, that’s 4.29lbs of potato.
Based on my experience, and general familiarity with numbers, weights, and measures, I believe that these measurements provide a good look, proportionally, at what to expect from potatoes in the future.