How much area of a driveway does one cubic yard of gravel cover at 2 inches deep?

One cubic yard of gravel covers approximately 162 square feet when spread at a depth of 2 inches. This is calculated by converting the cubic yard to cubic inches (1 cubic yard = 46,656 cubic inches) and then dividing by the depth of gravel in inches (2 inches), resulting in about 23,328 square inches, which is equivalent to 162 square feet.