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
To calculate the volume of concrete needed for an 8x8 foot slab that is 4 inches thick, first convert the thickness to feet: 4 inches is 1/3 foot. The volume in cubic feet is then 8 feet × 8 feet × (1/3) foot = 21.33 cubic feet. Since there are 27 cubic feet in a cubic yard, divide by 27 to find the required yards of concrete: 21.33 ÷ 27 ≈ 0.79 cubic yards. Therefore, you will need approximately 0.79 cubic yards of concrete.
To determine how much concrete is needed for an 8x8 area, you first need to know the thickness of the concrete slab. If, for example, the slab is 4 inches thick, you would convert the dimensions into feet (8 feet x 8 feet) and the thickness into feet (4 inches = 1/3 feet). The volume in cubic feet would be 8 x 8 x (1/3) = approximately 21.33 cubic feet. To convert this to cubic yards (since concrete is often sold by the cubic yard), divide by 27, resulting in about 0.79 cubic yards of concrete needed.
The cost of an 8 by 8 meter concrete slab can vary widely depending on factors such as location, labor costs, and materials. On average, the cost can range from $75 to $150 per cubic meter of concrete, plus additional expenses for labor and preparation. For an 8x8 meter slab that is 10 cm thick, the total cost could range from approximately $600 to $1,200 or more. It's best to get specific quotes from local contractors for an accurate estimate.
Not enough information. 8x8 what?
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)
8x8 feet = 64 square feet = 9,216 square inches.
64
64
8x8 = 64 squares.
64
64!