This question cannot directly be answered without having some kind of an idea for the volume of 40 pounds of the topsoil you intend to use (also known as its density). There are huge differences between eg. peat and sand, both which can reasonably be called "topsoil".
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.
40 pounds of topsoil is about 2 cubic feet, which will cover an area of 12 square feet at 2 inches deep.600 square feet divided by 12 square feet per bag is 50 bags.Answer50 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
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.
50 pounds covers 0.5 cubic feet. Since the depth is 3 inches, or 1/4 foot, you can cover 0.5/.25 = 2 square feet of area. That is not very much.
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.
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.
Area=64ft. Times 4in or .3ft deep.. 64ft x 0.3ft x5= 96ft3.
40 pounds of topsoil is about 2 cubic feet, which will cover an area of 12 square feet at 2 inches deep.600 square feet divided by 12 square feet per bag is 50 bags.Answer50 bags
ABOUT 43 bags. Dry sand weighs ABOUT 100 lbs per cubic foot- and you need 21.3 cubic feet.
The volume of sand weighs 455x 2/12 *100 pounds per cubic foot = 7600 pounds so you need about 152 bags.
16 bags for every 3 inches deep
12.3 bags for every 2 inches deep. (rounded)
how deep?
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
The volume of an area 24 feet round and 45 inches deep is: 1,700 cubic feet.
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.