75 bags.
Ah, isn't that a lovely question! You see, birdseed can vary in weight depending on its ingredients. As a general estimate, a pound of birdseed is roughly equivalent to 0.12 gallons. So, 20 pounds of birdseed would be approximately 2.4 gallons. Just imagine all the happy little birds that will enjoy that seed!
20
32 bags
Approx 1764 bags.
560 bags
20
20
20
20
20
20 bags. 16 oz are in a pound. 10 X 16 = 160 160/8 = 20