The weight of soil varies with its moisture content and density. Per cubic yard, topsoil can weigh 1,700 pounds when dry and 2,400 pounds when damp, with an average weight of 2,000 pounds.
One cubic yard is equivalent to 27 cubic feet. The quantity of soil needed to fill a garden or yard is found by multiplying its length, width and depth. If the measurements are in yards, the result is in cubic yards. If the measurements are in feet, divide the result by 27. One cubic yard of soil can cover an area 10 feet on each side at a depth of 3 inches.