Depends on the size of the bag. BUT, typical bags of mulch at places such as Home Depot weigh about 40 pounds and contain 2 cubic feet of mulch.
86 g
50 lb.
The normal size bags are 2 cu. ft. Delivery companies will normally charge you by the cu. yard. = 27 cu ft. There are 13.5 standard bags in a cu yard.
3
9
The answer you seek is printed on the bag; it should be fairly prominent.
1 ft = 12 in → 1 in = 1/12 ft Volume required to cover is 90 sq ft × 1 in = 90 sq ft × 1/12 ft = 7.5 cu ft → number of bags = 7.5 cu ft ÷ 0.8 cu ft/bag = 9.375 bags → you need to buy 10 bags
12 in = 1 ft Volume = 311 sq ft × 2 in = 311 sq ft × (2 ÷ 12) ft = 51 5/6 cu ft (≈ 51.8 cu ft) = 51 5/6 ÷ 0.8 cu ft/bag = 64 19/24 bags ≈ 64.8 bags → you need to buy 65 bags.
I presume 1 yard of mulch means 1 cu yard of mulch 1yd = 3ft 1 cu yard = 1yd x 1yd x 1yd = 3ft x 3ft x 3ft = 27 cu ft. 12 in = 1ft 1in = 1/12 ft 3in = 3/12 ft = 1/4 ft volume = area x depth => area = volume / depth = 27 cu ft / (1/4 ft) = 108 sq ft.
0.6 cu. ft.
For 1 foot deep, 400 cu ft. For 3 inches deep, 100 cu ft.
1 yard = 27 cu ft; 2 yard = 54 cu ft at 2 cu ft per bag, that is 54/2 = 27 bags