How much mulch do I need?
Quick answer: enter your dimensions in the Mulch Calculator below to see yards, bags, and an optional cost estimate. Most home projects can be answered in under a minute.
Mulch Calculator
Calculate cubic yards and bags of mulch for garden beds. Defaults to 3-inch depth and 2-cubic-foot bags — the most common retail size.
Inputs
Result
Volume
1.85 yd³
Bags (2 ft³)
25
Cubic feet
50.0 ft³
Waste default: 0% — Mulch settles but does not need a waste factor — measure tightly.
Diagram
Estimates only. Verify with a licensed contractor or supplier before purchasing. Rough Estimator! is not responsible for shortages, overages, or material variances. See our methodology for formulas and sources.
Formula
Bags = (L × W × D ÷ 12) ÷ bag size (ft³)
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- Landscape fabric
- Edging
Frequently asked questions
For a 200 ft² bed at 3 inches deep, you need about 25 bags (2 ft³ each) or 1.85 cubic yards bulk.
Cite this page
Cosyslabs. (2026). Mulch Calculator. Rough Estimator!. https://roughestimator.com/mulch-calculator
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