Mulch Calculator
Calculate exactly how many cubic yards or bags of mulch you need for any garden bed or landscape area. Supports multiple beds, shapes, and depths — with bulk vs. bag cost comparison.
Mulch Settings
Recommended: 2–3 in for existing beds, 4 in for new beds
Extra for irregular edges, settling, and overlapping
Pricing
Default pricing: $45/yd³ bulk, $6.50/bag (2 cu ft). Click "Edit Costs" to match your local supplier.
Mulch Estimate
Bulk delivery is usually cheaper above 3 yards
Depth Guidelines
- 2 in — top-up refresh
- 3 in — standard weed control
- 4 in — new beds, max weed block
- Don't pile mulch against tree trunks
How to Calculate How Much Mulch You Need
Mulch is sold by the cubic yard (bulk delivery) or by the bag (typically 1.5–2 cubic feet each). Getting the right amount saves money and prevents under-mulching — which lets weeds through — or over-mulching, which can suffocate plants and rot root systems.
The Mulch Formula
Step 1 — Area
Area (sq ft) = Length × WidthStep 2 — Cubic Feet
Cubic Feet = Area × (Depth in inches ÷ 12)Step 3 — Cubic Yards
Cubic Yards = Cubic Feet ÷ 27Step 4 — Bags
Bags = Cubic Feet ÷ Bag Size (usually 2 cu ft)Example: A 10 × 20 ft bed at 3 in depth = 200 sq ft × 0.25 ft = 50 cu ft = 1.85 cu yd ≈ 25 bags (2 cu ft each). Not sure of your bed's square footage? Use our square footage calculator first.
Recommended Mulch Depth by Purpose
| Purpose | Depth | Coverage (per yd³) |
|---|---|---|
| Top-up / refresh | 1–2 in | 162–324 sq ft |
| Standard weed suppression | 3 in | 108 sq ft |
| New bed / max weed block | 4 in | 81 sq ft |
| Playground safety | 6–9 in | 36–54 sq ft |
| Pathway / trail | 4–6 in | 54–81 sq ft |
Choosing the Right Mulch
Shredded Hardwood
Affordable, long-lasting, great weed suppression
Best for: Flower beds, trees, shrubs
Pine Bark
Slow to decompose, good drainage, acidifies soil
Best for: Acid-loving plants (azalea, blueberry)
Cedar
Natural insect repellent, aromatic, slow to break down
Best for: Areas near patios, vegetable gardens
Rubber Mulch
Extremely durable, doesn't decompose, stays in place
Best for: Playgrounds, high-traffic paths
Straw / Hay
Cheap, lightweight, great for vegetable gardens
Best for: Vegetable beds, erosion control
Compost
Feeds soil, improves structure, sustainable
Best for: All garden beds (best for soil health)
Bulk vs. Bagged Mulch
Bulk Delivery
- ✅ Cheaper for large projects (>3 yd³)
- ✅ Delivered by truck or dump trailer
- ✅ Typical cost: $30–$65 per cubic yard
- ❌ Minimum order (usually 1–2 yards)
- ❌ Requires wheelbarrow for spreading
Bagged Mulch
- ✅ No minimum, easy to store
- ✅ Convenient for small areas
- ✅ Typical cost: $4–$8 per 2 cu ft bag
- ❌ More expensive per cubic yard
- ❌ Heavy lifting, more trips from store
How It Works
Add Your Beds
Enter each garden bed or landscape area. Supports rectangular, circular, and triangular shapes.
Set Depth & Type
Choose mulch type and desired depth. Calculator applies waste factor automatically.
Get Yards & Bags
Instantly get cubic yards for bulk delivery or bag count, plus a bulk vs. bagged cost comparison.
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