Landscape materials such as topsoil, mulch, and river rock are commonly sold by the rough yard, or partial yard. A yard of material is 27 cubic ft. In other words a 9'x3'x1' space.
Check out our tips on mulching
so that you do this important garden task the right way.
Area Calculations: Draw your site as accurately as possible to scale. Use the following formulas to determine area:
Rectangle: Area = length x width
Circle: Area = 3.1416 x the square of the radius
Triangle: Area = 1/2 x length of base x length of height
Enter the area and the desired thickness of topsoil or mulch and click on "Calculate."(see right for area calculation hints)
If you are measuring odd or complex shapes, divide the area into combinations of rectangles, triangles, and/or circles. Measure these smaller areas and total the areas for them.
To determine topsoil requirements for areas of varying grade you may have to estimate an average fill depth.