Mulch Volume Calculator
Work out the volume of mulch needed to cover a bed to a set depth, in bags or bulk.
Mulch quantity, ordered right
Mulch is spread to a depth across an area, so the amount is a volume you can order as bags or in bulk. This works out that volume from your bed's area and the depth you want, and helps translate it into bags or a bulk quantity, so you order sensibly rather than guessing.
Enter the area and depth to see the mulch volume.
Bags versus bulk, and the right depth
Two practical points. For a small bed, bags are convenient; for a large area, buying in bulk by the cubic yard is far cheaper per unit, so knowing the total volume tells you which makes sense. And depth is what makes mulch work: too shallow and it fails to suppress weeds or hold moisture, too deep and piled against stems it can cause rot. A few inches is the usual target, kept clear of plant bases.
Common questions
Should I buy mulch in bags or bulk?
Bags suit a small bed; for a large area, bulk by the cubic yard is far cheaper per unit, so the total volume tells you which makes sense.
How deep should the mulch be?
A few inches to suppress weeds and hold moisture, kept clear of plant stems and trunks to avoid rot.
Is anything uploaded?
No. The calculation happens in your browser.