Mulch Calculator

Calculate mulch volume for garden beds, tree rings, or landscape areas, in cubic yards and bags.

Mulch Volume
— cubic yards
Plus bag count.

Usage Tip

Bulk mulch by the yard is far cheaper than bags once you pass about ten bags; keep mulch a few inches off plant stems and trunks.

THE MATH
cubic feet = area × depth ÷ 12
cubic yards = cubic feet ÷ 27, bags = cubic feet ÷ 2
Mulch volume is the bed area times the depth, converted to cubic yards (27 cubic feet per yard). Bagged mulch usually comes in 2-cubic-foot bags.
Enter the bed area and the mulch depth in inches (2 to 3 inches is typical).
The result shows cubic yards for bulk delivery and the equivalent bag count.
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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.