How many yards is 384 square feet?

The answer to how many yards depends upon how deep the material (ie, rock or mulch) is to be in the area. Using mulch as the material, at 2" deep, the anwer would be 4.26 yards (formula is L X W divided by 150) 640/150= 4.26 yards At 3" deep, the answer is 6.40 yards (L X W divided by 100) 640/100=6.4