Enter your bed area and mulch depth and the tool returns yards plus the equivalent in bags.
Bulk mulch is sold by the cubic yard, so this view leads with yards. Spread it 3 inches deep and keep it off trunks; mulch piled against bark holds moisture that rots the plant.
Why order extra? The headline number is the exact material your project needs. When you actually order, add about 5–10% on top — the “with 5% waste” figure in the result is a safe starting point. That margin covers what you lose to compaction, cuts around edges and corners, and ordinary spillage during handling. It is cheaper to have a little left over than to stop mid-job and wait on a second delivery.