A 50 lb bag of Quikrete typically covers about 0.375 cubic feet. To determine how many square feet it will cover, you need to know the thickness of the application. For example, at a thickness of 1 inch, a 50 lb bag of Quikrete will cover approximately 4.5 square feet.
How much concrete do I need for a 10x10 slab? The amount of concrete you need for a 10x10 slab depends on how thick it will be. So, for a 4-inch slab you'll need 1.24 cubic yards (56 80lb bags), but a 6-inch slab requires 1.85 yards (84 80lb bags).
So, you would need about 222 bags of concrete for a 20x20 slab with a thickness of 4 inches if using 80 lb. bags.
So, you would need about 80 bags of concrete for a 12x12 slab with a thickness of 4 inches if using 80 lb. bags.
For example, for a concrete slab that is 24' X 24' X 4”, simply enter 4 in the Thickness/Depth field, 24 in the Width field, and 24 in the Length field. Click “Calculate”. Your answer should be 7.11 yards. Note: The Concrete Volume Calculator can also be used to determine yardage for aggregate products.
Pouring a 24×24 concrete slab may cost between $2,304 to $4,608, factoring in material, labor, and a six-inch slab. Keep this range in mind when planning your project.
Visualizing how far a cubic yard isn't always intuitive, but there's an easy reference point: 9' x 9' slab at 4” deep, or about five sidewalk squares. In other words, 1 cubic yard of concrete placed at 4-inches deep will cover 81 square feet.
A 30-by-30-foot slab of concrete for a driveway, garage floor, or large patio costs $3,600–$7,200 on average. The following factors have the biggest impact on cost. Square footage: A greater surface area requires more materials and labor, increasing cost.
So, you would need about 9 bags of concrete for a 4x4 slab with a thickness of 4 inches if using 80 lb. bags.
C40 as the strongest standard mix for heavy-duty applications. When you're looking for the strongest standard concrete mix for heavy-duty applications, C40 is your go-to choice. For this mix, you'd typically use a proportion of 1 part cement, 1.5 parts sand, and 3 parts gravel, with a water-cement ratio of about 0.35.
A 50 lb bag of Quikrete typically covers about 0.375 cubic feet. To determine how many square feet it will cover, you need to know the thickness of the application. For example, at a thickness of 1 inch, a 50 lb bag of Quikrete will cover approximately 4.5 square feet.
Concrete is usually dry enough after 24 to 48 hours to walk on. For concrete to dry and reach its full strength, it typically takes about 28 days per inch of slab thickness. Once conditions are conducive for the concrete to cure at 85-90% relative humidity.
According to the general norm, 0.4 bags of cement on average are needed to create a square foot house that is fully furnished. So to calculate the number of cement bags for a 1000 square foot home you need to multiply the area of house by the cement bag per sq ft. This will result in: 1000 x 0.4 = 400 cement bags.
If your slab is under 5-inches deep, or if you plan to use it as a patio, sidewalk, or garden pad, you'll likely be fine without it. You could opt in for a welded wire mesh instead of rebar.
Mix two 50lb bags of concrete with water in a mixing tub or 5-gallon bucket. Add concrete into the hole and around the 4” x 4”. Depending on your climate, let concrete set up for 24 - 48 hours.
How Much Does a 20x20 Concrete Slab Cost? The estimated cost of a 20×20 concrete slab typically falls between $1,600 and $3,200, depending on various factors like thickness, additional features, and location.
How much does a 40x60 concrete slab cost? An installed 40x60 concrete slab (4 inches thick) for buildings will typically cost between $9,600 and $19,200. A 4-inch slab will usually cost between $4 and $8 per square foot (depending on your location) for materials and labor.
Alternatives to Concrete Slabs
One of the most budget-friendly options is crushed stone or gravel. These materials are not only affordable but also easy to install. They provide a natural aesthetic and excellent drainage.
So, you would need about 333 bags of concrete for a 20x30 slab with a thickness of 4 inches if using 80 lb. bags.
The material cost for concrete slabs generally ranges between $4 and $8 per square foot, with labor costs factored in. For a typical 30×50 concrete slab that is 6 inches deep, the cost can come to around $9000, but this could differ based on multiple factors such as the location of your building, among others.
Generally, wait 24 to 48 hours before walking on a new concrete surface that's four inches or thicker. If you plan to apply any coating on the concrete, such as sealer or paint, wait at least seven days for the surface to dry completely before applying it.
Concrete prices usually range between $120 and $150 per cubic yard depending on your distance from the supplier, the volume needed, and the type of concrete. Concrete costs fall between $120 and $150 per cubic yard, including material and delivery within 20 miles.