Step 1: Determine square footage of the area (length x width)

 

     Example: 10-ft long by 20-ft wide = 200 sq. ft.

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Step 2:  Determine the desired depth of the material in inches

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     Example: 3 inch material depth

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Step 3:  Convert depth in inches to decimal by dividing by 12

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     Example: 3 divided by 12 = 0.25

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Step 4: Multiply square footage by depth (decimal form)

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     Example: 200 x 0.25 = 50

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Step 5: Divide the value from Step 4 by 27, this is the amount of

material you need in cubic yards

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     Example: 50 divided by 27 = 1.85 cubic yards of material

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