See how much mulch you need — in cubic yards and 2 cu ft bags — from your bed area and the depth you want.
Bagged mulch is usually 2 cubic feet; bulk mulch is sold by the cubic yard (27 cubic feet). Buying bulk is cheaper for large beds. Estimate only.
Multiply bed area by the depth (in feet) for cubic feet, then divide by 27 for cubic yards. Bagged mulch usually comes in 2 cubic foot bags; bulk mulch is sold by the yard and is cheaper for big jobs.
Cubic feet = area × (depth ÷ 12) · Bags = cubic feet ÷ 2
2–3 inches suppresses weeds and holds moisture without smothering roots. Refresh it as it breaks down.
Bags are convenient for small beds; bulk by the cubic yard is much cheaper once you need more than about 12–15 bags.
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Last reviewed: September 2026. Free to use, no signup — Mulch Calculator by ToolWise Digital.
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