18 bags (80 pounds) of quikrete for a 4 inch thick slab.
U need 1.63 80lb bags per square ft so 131bags to do 8ft by 8ft
Not enough information. 8x8 what?
8x8 feet = 64 square feet = 9,216 square inches.
Your patio is (8x8)/6in = 10.66 cubic foot. The sand comes in 50 lb bags that cover 0.5 cubic foot so you will need 21.33 bags (round up to 22 or down to 21)
64
8x8 = 64 squares.
64
64
64!
9x7 and 7x9 are the same and equals to 63 whereas 8x8 equals to 64 so therefore 8x8 is greater than both 9x7 and 7x9.
8x8 is not 68, it is 64.
64 square feet