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CALCULATOR
(Mulch/Soil/Sand)
27 cubic feet (cu ft.) = 1 cubic yard (cu yd.)
1 cu yd. covers 324 sq ft. @ 1 inch depth
162 sq ft. @ 2 inch depth
108 sq ft. @ 3 inch depth
2 cu ft. bag covers 24 sq ft. @ 1 inch depth
12 sq ft. @ 2 inch depth
6 sq ft. @ 3 inch depth
3 cu ft. bag covers 36 sq ft. @ 1 inch depth
18 sq ft. @ 2 inch depth
9 sq ft. @ 3 inch depth
9 (3 cu ft.) bags of mulch = 1 cubic yard
18 (40#) bags of mushroom compost
= 1 cubic yard
39 (40#) bags of topsoil = 1 cubic yard
1 bale straw = 1000 sq ft. @ 1/2" deep
1 (50#) bag of stone = 5 sq ft. @ 1" deep
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MULCH
Length x width = area (sq ft.)
(total sq ft. x # of inches deep) / 324 = yds. mulch needed
ie. 25 ft. (length) x 10 ft. (width) = 250 sq ft. (area)
(250 sq ft. x 3 inches deep) / 324 = 2.31 yds.* mulch needed.
*Round off to the nearest higher half yard (2 1/2 yds. mulch needed).
BEDDING SAND
Length x width = area (sq ft.)
(Area / 12 inches) x 1 inch depth = Cubic ft. of sand
Cu ft. of sand / 27 = cu yds. of sand needed.
CRUSHED GRAVEL
Length x width = area (sq ft.)
(Area / 12 inches) x inches of base required = total cu ft.
(Cubic ft. x 1.25) / 27 = cu yds. of base needed.
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AREA
Rectangle or Square
length x width
Circle
3.14 x radius of circle(2)
Volume for Soil
length x width x depth = cu ft.
ie. 25 ft. (length) x 10 ft. (width) x 3 ft. (depth)
= 750 cu ft.
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