Estimate how much mulch you need in cubic feet and cubic yards from bed dimensions and mulch depth.
Mulch is a volume calculation. Enter the bed area and desired finished depth to estimate cubic feet and cubic yards.
Cubic yards = area \u00d7 (depth \u00f7 12) \u00f7 27A 300 sq ft bed at 3 in deep needs about 2.78 cubic yards of mulch.
At 3 inches deep, one cubic yard covers about 108 sq ft. At 2 inches deep, it covers about 162 sq ft.
There are 27 cubic feet in one cubic yard.
Not always. If the old layer is still suitable, measure how much depth is needed to reach your desired finished level.
Use an appropriate layer over the root zone but keep mulch away from direct contact with the trunk; avoid creating a “mulch volcano.”