What does this tool do?
Mulch is sold by bag or by the cubic yard, and the amount depends on bed size and depth. This calculator converts bed dimensions into cubic feet, cubic yards and whole bags.
The Formula
Volume (cu ft) = Length (ft) × Width (ft) × Depth (in) ÷ 12; Bags = ⌈Volume ÷ Bag size⌉Frequently Asked Questions
How deep should mulch be?
Two to four inches is typical for moisture retention and weed control. Keep mulch a few inches away from trunks and stems so the bark does not stay wet.
Should I buy bags or bulk?
Bags suit small beds and tight access. Bulk is usually cheaper once you need a cubic yard or more, but check delivery fees and where the pile can be dropped.