How Mulch Do You Need? Product Calculator What is the shape of the area you are applying mulch? --Please choose an option-- Rectangular Circular Enter the dimensions of the area. Length: Feet Width: Feet Depth: Inches Inner Diameter: Feet Outer Diameter: Feet Depth: Inches Calculate Based on the numbers entered above, your project requires approximately... 0 cubic yards* * Estimated values are approximations. The actual amount needed may vary.