Total Area: square feet (see calculations below)
Desired Thickness of Topsoil or Mulch: inches
(1 yard contains 27 cubic feet, or enough material to cover 100 square feet 3 inches deep)
Area Calculations:
Rectangle: Area = length x width
Circle: Area = 3.1416 x the square of the radius
Triangle: Area = 1/2 x length of base x height
