To produce one yard of concrete, you'll need to use about 45 80-pound bags (or 90 40-pound bags). Because of the time and labor required to prepare such a large quantity, it is usually more cost- and time-effective to have
“A quick rule of thumb: one pallet of bags is about a cubic yard of concrete. Though it actually takes 45 bags of 80-pound mix to hit a cubic yard dead on, this is a great method to get a good initial estimate.
One Cubic Yard of Concrete: 4-inches thick – covers 81 square feet. 5-inches thick – covers 65 square feet.
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.
So, you would need roughly 4.94 to 7.41 cubic yards of concrete for a 20x20 slab, depending on whether you go with a thickness of 4 inches or 6 inches. However, it's always a good idea to order a little more concrete than calculated to account for any miscalculations or spillage during pouring.
So, you would need about 9 bags of concrete for a 4x4 slab with a thickness of 4 inches if using 80 lb. bags.
Concrete costs $4–$8 per square foot on average. This means you'll pay $1,600–$3,200 for a 20-by-20 foot concrete slab, depending on the slab's thickness and concrete type.
How much does a 30x40 concrete slab cost? The average cost is $4 to $8 per square foot. The median price is about $6 per square foot. Based on these averages, you may pay $4,800 to $9,600 with a median estimate of $7,200.
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).
However, for some smaller projects, you may be able to order concrete by the cubic foot. You can also order concrete by the truckload. A truckload contains about 10 cubic yards of material, though that amount may vary between companies. The average truckload of concrete costs $1,100 to $1,440.
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.
An 80 pound bag of concrete cost $4 and covers 2.5 square feet.
The minimum thickness for a residential concrete driveway is 4 inches. However, 5 or 6 inches is recommended if you live in an area with heavy traffic or large vehicles. For extra strength and durability, you can go up to 8 inches.
With each round of mixing taking approximately 5 minutes, you can complete a maximum of 12 rounds of mixing in that timeframe. Most standard mixers allow for a maximum of two 80# bags of concrete per batch for a total of 24 bags in an hour.
To produce one yard of concrete, you'll need to use about 45 80-pound bags (or 90 40-pound bags). Because of the time and labor required to prepare such a large quantity, it is usually more cost- and time-effective to have ready mix concrete delivered.
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.
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.
How Thick Does Concrete Need to Be for a Slab? In general, for residential areas like walkways and patios, 4 inches of concrete is sufficient for a slab. For a deck or deck stair landing, again, around 4 inches of concrete is sufficient.
A concrete garage floor should be at least four to six inches thick for most residential properties. This has the capacity to hold small or average-sized cars, such as what might be found in the typical two-car garage.
Concrete is the ideal material for walkways, patios, or foundation slabs. Pouring a slab yourself can easily save you half of the cost of hiring it out. All you need is a clear day, the right tools, and these seven steps.