Mulch Calculator
Enter your bed dimensions and desired depth to see exactly how many cubic yards of mulch or topsoil you need — plus bags and estimated cost.
Pre-filled with a 10 × 20 ft bed at 3" depth. Edit to match your project.
Material
Mulch Type
$30–$45 per cubic yard
Hardwood Mulch Needed (with 10% overage)
2.0yd³
Total Area
200 ft²
Exact Volume
1.85 yd³
Bags Needed
(2 cu ft bags)
28
Estimated Cost
$61–$92
Coverage reference: 1 cubic yard covers 162 sq ft at 2" depth or 108 sq ft at 3" depth.
What Is a Mulch & Topsoil Calculator?
A mulch calculator converts your bed dimensions — length, width, and desired depth — into the exact volume of material you need to order. The formula is straightforward: (L × W × D ÷ 12) ÷ 27 gives you cubic yards. Our calculator adds 10% overage so you don't come up short, and shows how many 2 cu ft bags you'd need if buying retail. For topsoil projects like raised beds and lawn leveling, switch to Topsoil mode for adjusted pricing.
How to Use This Calculator
- 1Measure each bed’s length and width in feet. For irregular shapes, break them into rectangles.
- 2Choose Mulch or Topsoil. Mulch mode lets you pick a type (Hardwood, Cedar, Pine Bark, or Rubber) with different cost ranges.
- 3Set your depth in inches. Standard mulch beds use 2–3″; topsoil for new beds typically needs 4–6″.
- 4Click “Add another bed” if you have multiple areas — the calculator totals everything.
- 5Review cubic yards, bags needed, and estimated cost range. Use Print or Copy to save for your supplier order.
How Much Does Mulch Cost?
Mulch prices vary widely by type. Basic hardwood runs $30–$45 per cubic yard, while cedar (naturally insect-resistant) costs $45–$75. Rubber mulch is the most expensive at $80–$160 per yard, but it lasts 10+ years. Buying in bulk (by the yard) saves 30–50% compared to bagged mulch from a big-box store.
| Material | Cost / Cubic Yard | Best For |
|---|---|---|
| Hardwood | $30–$45 | Flower beds, tree rings, general landscaping |
| Cedar | $45–$75 | Insect-prone areas, raised beds, playgrounds |
| Pine Bark | $30–$55 | Acid-loving plants, slopes, hillside beds |
| Rubber | $80–$160 | Playgrounds, permanent beds, high-traffic areas |
| Topsoil | $25–$50 | New beds, lawn leveling, raised garden beds |
Best Mulch for Landscaping
The right mulch depends on your beds, climate, and budget. Here's how each type performs in real-world landscaping. For bed design inspiration, see our flower bed edging ideas.
Hardwood mulch
The all-rounder. Decomposes slowly, enriches soil, and looks clean in any bed. Best for flower beds, tree rings, and foundation plantings.
Cedar mulch
Naturally repels termites, ants, and some beetles. Ideal for beds near your home’s foundation or in insect-prone climates. Lasts 2–3 years.
Pine bark mulch
Lightweight and slightly acidic — perfect for azaleas, blueberries, and rhododendrons. Holds moisture well on slopes where heavier mulch washes away.
Rubber mulch
Made from recycled tires. Doesn’t decompose, won’t attract pests, and lasts 10+ years. Best for playgrounds and permanent beds where you don’t want annual re-mulching.
Common Project Examples
Typical mulch quantities for popular projects. All estimates include 10% overage. Planning a bigger landscaping project?
Front yard flower bed (10 × 4 ft, 3″ deep)
0.12 yd³ · 2 bags — Hardwood at ~$4–$6 total
Large garden bed (20 × 10 ft, 3″ deep)
0.61 yd³ · 9 bags — Cedar at ~$30–$50
Playground area (15 × 20 ft, 4″ deep)
1.22 yd³ · 18 bags — Rubber at ~$108–$215
Need to calculate materials for adjacent areas? Try our gravel calculator for walkways or paver calculator for patios. For seasonal prep, check the spring lawn care checklist.
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