How many 80 pound bags of redi mix for 22 square foot 4 inches deep?

To calculate the number of 80-pound bags of ready-mix concrete needed for a 22 square foot area at 4 inches deep, first, determine the volume in cubic feet. The volume is 22 sq ft × (4/12) ft = 7.33 cubic feet. An 80-pound bag of concrete typically yields about 0.6 cubic feet. Therefore, you would need approximately 12-13 bags (7.33 / 0.6 ≈ 12.22).