Soil Volume Calculator
Use this table to calculate how much soil you need. Along the top is the depth needed for the area covered. As an example, if a raised bed is constructed from 4x8x10 lumber, then choose 10 inches. A 4x8 raised bed is 32 square feet in area. Find "32" in the table in the 10" column. To find the cubic yards needed, follow the "32" located in the 10" column all the way to the left. The answer is 1 cubic yard.