Awasome Raised Garden Bed Conversion For Yards Dirt Ideas. For a 4 foot by 4 foot raised vegetable bed you would need a total of 14.67 cubic feet of raised bed soil, or 9.78 1.5 cu. The desired height or depth of the garden bed.

Larger bags of potting soil are often labeled according to cubic feet with most being offered in 2. So, for example, 1m x 2m x.3m =.6 of a cubic. However, many of us aren’t sure about how high to make the raised bed.