How many pounds of standard white flour will a 5 or 6 gallon bucket hold? I'm planning on getting several 5 or 6 gallon food grade buckets with gamma lids to hold bulk flour, oats and such in my kitchen but I was wondering how many pounds they hold. I'm guessing that a 6 gallon bucket would hold 30 or 40 pounds of flour but I honestly don't have a clue. If anybody has any experience with this and could help me out I'd appreciate it greatly.