Mulch Calculator
Calculate mulch volume, weight, cost, and coverage for gardens, flower beds, and landscaping. 6 calculation modes with step-by-step solutions.
Calculate
Select a calculation type, enter your values, and click Calculate to see mulch volume, weight, cost, or coverage with step-by-step solutions.
Result
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Volume in Different Units
Step-by-Step Solution
Complete User Guide
What is the Mulch Calculator?
The Mulch Calculator helps you determine the exact amount of mulch for your landscaping project. It handles rectangular, circular, and triangular areas, and can also calculate weight by mulch type, estimate material cost, and determine how much area a given volume covers at a specific depth.
6 Calculation Modes
Rectangular
V = L × W × D. Garden beds, lawns.
Circular
V = π × r² × D. Tree rings, round beds.
Triangular
V = ½ × B × H × D. Corner beds.
Coverage
Area = Volume / Depth.
Weight
W = V × Density. 6 mulch types.
Cost
Cost = Qty × Price.
Mulch Densities
| Type | Density (lbs/ft³) | Lbs per Yard |
|---|---|---|
| Wood Chips | 25 | 675 |
| Bark Mulch | 22 | 594 |
| Straw | 6.25 | 169 |
| Compost | 37.5 | 1,013 |
| Rubber Mulch | 12.5 | 338 |
| Stone | 100 | 2,700 |
Recommended Depths
🌸 Flower beds: 2–3 inches
🥕 Vegetable gardens: 2–4 inches
🌳 Tree rings: 3–4 inches
🚶 Pathways: 4–6 inches
Important Notes
- Add 5–10% extra for settling and compaction.
- Mulch is typically sold by the cubic yard or by the bag (2 cu ft).
- Do not mulch deeper than 4 inches around plant stems to avoid rot.
- Cost estimates are approximate; prices vary by supplier and region.