Draw your site as accurately as possible using graph paper if available. For oddly-shaped areas, divide the area into combinations of rectangles, triangles, and/or circles. Use the following formulas to determine area:
Area = length x width
Area = 1/2 x length of base x length of height
Area = 3.1416 x the square of the radius
Once you have determined the area in sq ft. and decided on the depth of the mulch spread enter
the thickness and area in sq. ft. then press calculate.