Mulch Calculator
Last updated: July 2026 · Free · No sign-up required
Enter values above and click Calculate to see your result instantly.
Quick reference
| Depth | 1 cubic yard covers |
|---|---|
| 1 inch | 324 sq ft |
| 2 inches | 162 sq ft |
| 3 inches | 108 sq ft |
| 4 inches | 81 sq ft |
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Responsive design tested down to a 320px-wide phone screen. The input fields use native number/date keyboards on iOS and Android, the calculate button is thumb-sized, and the result still reads big and bold on the smallest screen. No app to download, ever.
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Interpretation guide
| Depth | Best use |
|---|---|
| 2 inches | Refresh existing beds |
| 3 inches | Common weed-suppression depth |
| 4 inches | New beds, avoid piling against trunks |
lightbulb Mulch for a 200 sq ft bed at 3 inches deep
Result: About 1.85 cubic yards, or 25 bags of 2 cu ft. 200 × (3/12) = 50 cubic feet; ÷ 27 = 1.85 cubic yards; ÷ 2 = 25 bags.
What this means: A dry 2-cubic-foot bag of wood mulch weighs roughly 20 lb (up to ~40 lb when wet), so this load is about 500 lb — worth ordering in bulk.
Formula & methodology
Formula: Cubic yards = area(ft²) × depth(in) ÷ 324
One cubic yard is 27 cubic feet. Because depth is usually entered in inches, area × depth ÷ 324 converts directly to cubic yards.
Frequently asked questions
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