Need to know how many bags of cement I will need for a 20x10 space?
According to the related link below; the required amount to cover 1 square yard with 4 inches of concrete is 6.6 60 pounds bags.
2.2 Yards
4.4 bags
It depends on the usage of the concrete. For footings, you would need 5 bags of cement. For sidewalks, etc. you would need 6 bags. Generally, if you know the usage it's for, you can contact a local ready-mix plant and they can tell you exactly.
You would need 31, 80 pound bags to cover 1 cubic yard at 4 inches deep. If you would like the depth to be 6 inches, 45 bags would be needed.
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.
12.3 bags for every 2 inches deep. (rounded)
16 bags for every 3 inches deep
It depends upon how deep you want it filled. For example, if you want it filled 6" deep, then the cubic feet would be 175 sq. ft X 0.5 ft. = 87.5 cubic feet. 87.5 cubic feet / 5 cubic feet/bag = 17.5 bags
2 inches is 0.167 feet. 266 ft^2 * 0.167 ft = 44.3 ft^3 44.3 ft^3 / 8 ft^3 = 5.54 bags which ~6 bags By the way ft^3 is cubic feet
A 40 lb. bag of soil containing 2 cu.ft.3 will cover 25 sq.ft. @ 1" inch deep. My guess then would be 4 or more -40lb. bags would take care of 24 sq.ft. 4" deep.
3 inches = 1/4 footVolume = 82 x 1/4 = 20.5 cubic feetIf you're buying 5-cubic-foot bags, then these are your choices:-- Buy 4 bags, and leave the job 2.5% incomplete. (Cover is only 2.93" deep, not 3".)-- Buy 5 bags, and use only 10% of the 5th one.-- Spread all 5 bags, and wind up with the 82 square feet covered 3.66 inches deep.
how many bags of cement for a pad 4x7x4 inches thick
The volume of sand weighs 455x 2/12 *100 pounds per cubic foot = 7600 pounds so you need about 152 bags.
To determine how many bags of sand are needed for a 10 x 10-foot patio that is 2 inches deep, first calculate the volume of sand required. The area is 100 square feet, and the depth in feet is 2 inches (which is 1/6 feet). Therefore, the volume is 100 x (1/6) = approximately 16.67 cubic feet. If a standard bag of sand covers about 0.5 cubic feet, you would need roughly 34 bags of sand (16.67 / 0.5 = 33.34).
To convert the weight of the sand into a volume and find out how much you need you would need to know the density of the sand as the more dense it is the less sand there will be in a 50lb bag and the more bags you would then need to fill the yard