To many!
An 80lb bag of concrete you can at your local home improvement store covers about 4 square foot at 2" thick. So you would need about 144 bags of 80lb concrete.
50lb bags 3.7 60lb bags 3.1 80lb bags 2.3 90lb bags 2.1 These amounts are for using the redi-mix bags.
about 17 yards of concrete (it's sold by the cubic yard)
To fill a 10-inch diameter sonotube that is 4 feet deep, you'll need to calculate the volume of the tube. The formula for the volume of a cylinder is V = πr²h. The radius is 5 inches (0.417 feet), so the volume is approximately 0.544 cubic feet. A typical bag of concrete (60 lbs) yields about 0.45 cubic feet, meaning you'll need about 1.2 bags of concrete to fill the sonotube completely. Therefore, you should plan on purchasing 2 bags to ensure you have enough material.
That depends on how DEEP you want the concrete !
An 80lb bag of concrete you can at your local home improvement store covers about 4 square foot at 2" thick. So you would need about 144 bags of 80lb concrete.
There is no way to answer that without knowing how deep the concrete will be.
4.4 bags for each 1-foot deep. 2.2 bags for each 6-inches deep. Each 5-ft3 bag will cover the area to 2.72 inches deep.
50lb bags 3.7 60lb bags 3.1 80lb bags 2.3 90lb bags 2.1 These amounts are for using the redi-mix bags.
12.3 bags for every 2 inches deep. (rounded)
16 bags for every 3 inches deep
54sqare feet
The number of bags of concrete needed for setting a fence post depends on the size and depth of the hole. Typically, one bag of concrete is enough for a 4-inch diameter post hole that is 2 feet deep. For larger or deeper holes, you may need more bags of concrete. It is recommended to consult a professional or follow the instructions on the concrete packaging for specific guidance.
6
You need (182/3) divided by (cubic feet of mulch in each bag) bags.
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.
If it is the same as concrete it will cover 162 square feet. concrete covers 81 square feet by 4" deep