About Mulch Calculator
Convert bed area and installed depth into bulk or bagged mulch quantities.
Inputs and calculations stay in your browser and require no signup.
How the calculation works
Planning calculation
Volume = area × depth in feet; cubic yards = cubic feet ÷ 27.
How to use this calculator
- 1Enter measured project dimensions and quantities.
- 2Adjust material, spacing, waste or density assumptions to match the project.
- 3Review the live planning quantities.
- 4Round purchasing quantities appropriately and confirm field conditions.
Understanding the result
For 100 square feet at 3 inches, the result is 25 ft³ or about 0.926 yd³.
Results use the units shown beside each field and output.
Important limitations
- Settling, irregular grades and desired replenishment depth can change actual need.
- Bag volumes should come from the product label.
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Frequently asked questions
How much mulch for 100 ft² at 3 inches?
25 cubic feet, about 0.926 cubic yards.
Can I calculate a circle?
Yes. In circle mode, the entered length is treated as diameter.
Can I change bag size?
Yes. Enter bag volume in cubic feet.
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