How this estimate works
The calculator applies: ceil(length x width x depth x (1 + waste/100) / bagVolume). Keep measurements in one unit system and round up when suppliers sell whole units.
Limitations
Settling, wind, edging, and the product volume printed on the bag affect the count.
Source to check
Read the authoritative guidance for mulch calculator
Frequently asked question
How deep should mulch be? Use the plant and local extension guidance; avoid burying trunks and stems.