How do you calculate mulch coverage?

Mulch coverage is calculated by taking the total cubic volume of the mulch (usually in cubic yards) and dividing by the desired depth of mulch. This answer will be the number of square yards of mulch, and is easily converted to square feet.

To figure out the area of your garden or garden beds, consider breaking the garden into separate shapes and calculating individually. Then, add the total area of each shape for the garden's total area. Once you have the area, decide on the desired mulch depth and multiply. This cubic volume will give you an approximation of your garden or garden bed needs.