Project Volume Calculator
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Geometric volume plus any chosen allowance
Illustrative bulk mulch density; species, moisture and particle size vary substantially. Allowances and costs are estimates; verify supplier units and field conditions.
How much mulch does a cubic yard cover?
A cubic yard has 27 cubic feet. One cubic yard covers 324 square feet at one inch deep, 162 square feet at two inches and 108 square feet at three inches.
Coverage depends directly on the depth applied. Measuring an existing mulch layer can help avoid calculating the full depth when only topping up.
Bulk mulch compared with bags
Bagged mulch is often labeled by cubic-foot volume. To compare bags with bulk cubic yards, divide 27 by the labeled cubic feet per bag. For example, 13.5 two-cubic-foot bags equal one cubic yard by volume, so 14 whole bags are needed.
Estimating multiple garden beds
Calculate length, width and depth for each rectangular bed. Divide curved or irregular beds into smaller measured sections, then sum their cubic yards. Where depths differ, calculate separately.
Practical ordering considerations
Wood mulch may settle over time, and different products have different moisture, texture and particle size. Verify how a supplier measures and delivers bulk mulch rather than assuming a single overage rule.
Frequently Asked Questions
How many 2-cubic-foot bags make a cubic yard?
13.5 bags equal a cubic yard by volume; purchase at least 14 whole bags to meet that volume.
How much mulch for a 12 × 10 garden bed at 3 inches?
Approximately 1.11 cubic yards before ordering allowances.
Related Calculators and Guides
Continue with a material-specific estimate, convert units, or review the calculation behind your result.