Mulch Cost Calculator
Budget bulk mulch delivered and spread by the cubic yard, and see the crossover point where bulk beats bagged mulch on price.
How this calculator works
This combines material cost (bulk cubic yards of mulch, from the standard volume formula, times your price per cubic yard) with labor to spread it across your beds (area times a per-square-foot rate). Both price fields are editable placeholders.
Formula: Cubic yards = (Length ft × Width ft × Depth ft) ÷ 27. Total cost = (Cubic yards × Price/yd³) + (Area sq ft × Labor rate/sq ft).
Worked example
A 20 ft × 10 ft (200 sq ft) bed at 3 inches, $35/yd³ material, $0.75/sq ft labor:
- Depth in feet: 3 ÷ 12 = 0.25 ft
- Cubic yards: (20 × 10 × 0.25) ÷ 27 ≈ 1.8519 → 1.85 yd³
- Material cost: 1.8519 × $35 ≈ $64.81
- Labor cost: 200 × $0.75 = $150.00
- Total estimated cost: $214.81
Cost reference (at default rates)
| Bed size | Estimated total cost |
|---|---|
| 10 ft × 5 ft | ~$54 |
| 20 ft × 10 ft | ~$215 |
| 40 ft × 20 ft | ~$859 |
How to measure your area
Measure the total square footage of all beds you’re mulching, treating irregular beds as a series of rectangles and circles you calculate separately and add together. Skip the areas taken up by large shrubs or hardscaping if you want a tighter estimate, since mulch doesn’t cover those spots.
Frequently asked questions
At what point does bulk mulch beat bagged mulch on price?
A standard bag covers about 2 cubic feet, and there are 27 cubic feet in a cubic yard, so it takes roughly 13-14 bags to equal one bulk yard. Once a bed needs more than about 2-3 cubic yards, bulk delivery is almost always cheaper per yard than buying that many individual bags, even after adding a delivery fee.
What's included in this cost estimate?
Material cost (bulk cubic yards × price per yard) plus labor to spread it (area × labor rate). It doesn't include a delivery fee, which many bulk suppliers charge separately based on distance and load size.
How deep should mulch be spread?
2-3 inches is the standard recommendation for most garden beds and around trees — this calculator defaults to 3 inches. Piling mulch deeper than 4 inches, especially against tree trunks and stems, can trap moisture and promote rot rather than help the plants.
Do I need to reapply mulch every year?
Organic mulch breaks down over a season, so most beds need a fresh 1-2 inch top-up annually to maintain the full 2-3 inch depth, rather than a full 3-inch reapplication every time — factor that into your ongoing yearly budget.
Does dyed mulch cost more than natural mulch?
Yes, typically — dyed and colored mulches (black, brown, red) usually run somewhat higher per yard than natural, undyed wood mulch due to the added processing. Adjust the price field to match the specific product you're buying.
Estimates only. Verify quantities with your supplier before purchasing.