To determine how many bags of concrete are needed for a slab measuring feet x feet x 4 inches, first convert the dimensions to cubic feet. A 4-inch thickness is equivalent to 0.33 feet, so the volume is calculated as length x width x 0.33. Then, divide the total cubic feet by the volume of a standard bag of concrete (usually 0.5 cubic feet). This will give you the number of bags required.
You need to specify the slab's width and the length as well.
11.852 cubic yards
How deep? Are you talking about dry mix weight or finished weight? Concrete weighs 150 pounds per cubic foot. So if you have a 6" slab, that's 150# for 2 square feet. For a 4" slab, the same amount will cover 3 square feet. For a 3" slab, 4 square feet. Concrete mix is commonly sold in 80 pound bags. The finished weight is the mix plus the water that gets chemically bound to it. There's a guide on the bag telling how many bags you need for a given area and thickness.
To determine how many slabs of size 450 mm x 450 mm are needed for an area of 10 m², first convert the slab dimensions to square meters. Each slab is 0.45 m x 0.45 m, which equals 0.2025 m² per slab. Therefore, to cover 10 m², you would need 10 m² ÷ 0.2025 m²/slab ≈ 49.38 slabs. Since you can't have a fraction of a slab, you would need 50 slabs.
To determine how many 94-pound bags of cement are needed for a 12x12 slab, first calculate the volume of the slab. A 12x12 slab that's 4 inches thick has a volume of 4 cubic feet (12 x 12 x 0.33). One 94-pound bag of cement yields about 0.6 cubic feet when mixed. Therefore, you'll need approximately 7 to 8 bags of cement to complete the slab.
129
18 bags (80 pounds) of quikrete for a 4 inch thick slab.
To calculate the number of bags of concrete needed for a 2x2x4 slab, first determine the volume of the slab in cubic feet: 2 ft x 2 ft x 4 ft = 16 cubic feet. Since a standard bag of concrete (typically 80 lbs) covers about 2 cubic feet, you would need approximately 8 bags (16 cubic feet ÷ 2 cubic feet per bag). Therefore, you would need 8 bags of concrete to make the slab.
3.95 cubic yards of cement are needed for a slab that size.
20
A 15' x 20' x 4" slab needs at least 3.7 cubic yards.
To determine how many bags of concrete you need for a 10 x 10 slab, first calculate the volume: a 4-inch thick slab is 10 x 10 x (4/12) = 33.3 cubic feet. A typical 80-pound bag of concrete covers about 0.6 cubic feet. Dividing 33.3 by 0.6 means you would need approximately 56 bags of concrete for that size slab.
1.19 Cubic Yards
To calculate the number of 80-pound bags of concrete needed for a 10 x 10 x 4-foot slab, first determine the volume in cubic feet: 10 x 10 x 4 = 400 cubic feet. Since a standard 80-pound bag of concrete yields about 0.6 cubic feet, divide the total volume by the yield per bag: 400 ÷ 0.6 ≈ 667 bags. Therefore, you would need approximately 667 bags of 80-pound concrete to complete the slab.
To calculate the number of bags of concrete needed for an 11x11 slab, first determine the volume of the slab by multiplying its length, width, and thickness (in feet). For example, if the slab is 4 inches thick, convert that to feet (4 inches = 0.33 feet) and calculate the volume: 11 ft x 11 ft x 0.33 ft = 40.13 cubic feet. Next, convert cubic feet to cubic yards (1 cubic yard = 27 cubic feet), which gives you approximately 1.48 cubic yards. Finally, if each bag of concrete covers about 0.5 cubic feet, divide the total volume by the coverage per bag to find the number of bags needed: 40.13 / 0.5 = about 81 bags.
To calculate the number of 80-pound bags of concrete needed for a 2x2 slab that is 6 inches thick, first determine the volume of the slab. The volume is 2 feet x 2 feet x 0.5 feet (6 inches) = 2 cubic feet. An 80-pound bag of concrete typically yields about 0.6 cubic feet. Therefore, you would need approximately 4 bags (2 cubic feet ÷ 0.6 cubic feet per bag = about 3.33 bags, rounded up to 4).