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Mulch & Soil Calculator

Calculate cubic yards of mulch or soil needed.

Last updated: June 13, 2026

Calculator

Area Length

feet

Area Width

feet

Desired Depth

inches

Results

Cubic Yards1.85

50.0 cubic feet

Bags (2 cu ft)25 bags

Coverage Area200 sq ft

Estimated Cost (bulk)$83-$120

Mulch: $45-$65 per cubic yard delivered

How to Use This Calculator

1Enter the length and width of your area in feet.
2Enter the desired depth in inches (typical: 2–3" for mulch, 4–6" for soil).
3View cubic yards needed, bag count, and estimated cost.

Formula Explanation

Volume is calculated from area dimensions and depth, then converted to cubic yards. One cubic yard equals 27 cubic feet.

Volume (cu ft) = Length × Width × (Depth in inches ÷ 12) Cubic Yards = Volume ÷ 27 Bags (2 cu ft each) = Volume ÷ 2

Variables:

DepthDesired coverage depth in inches

27Cubic feet per cubic yard

Worked Examples

20×10 ft garden bed, 3 inches deep

1. Volume = 20 × 10 × (3/12) = 50 cu ft
2. Cubic yards = 50 / 27 = 1.85
3. Bags (2 cu ft) = 50 / 2 = 25 bags

Result: 1.85 cubic yards or 25 bags | Cost: $83–$120 (bulk delivery)

Why Use This Calculator

Order the right amount of mulch or soil — no guessing.
Compare bulk delivery vs. bagged pricing.
Works for mulch, topsoil, compost, gravel, and other bulk materials.
Saves money by avoiding over-ordering.

336 × 280 Large Rectangle

300 × 250 Medium Rectangle

Tips & Best Practices

Mulch should be 2–3 inches deep — deeper can suffocate plant roots.
Bulk delivery is significantly cheaper than bags for areas over 100 sq ft.
Topsoil depth should be 4–6 inches for new garden beds.
Refresh mulch annually — it decomposes and thins over the season.

Common Mistakes to Avoid

❌ Applying mulch too deep (4+ inches), which can kill plants.

✅ 2–3 inches is ideal. Keep mulch a few inches away from plant stems and tree trunks.

❌ Confusing cubic feet with cubic yards when ordering bulk.

✅ 1 cubic yard = 27 cubic feet. This calculator does the conversion for you.

❌ Not accounting for irregular shaped beds.

✅ Break irregular shapes into rectangles, calculate each, and add together.

Frequently Asked Questions

How deep should mulch be?

2–3 inches is ideal for most landscaping applications. This depth suppresses weeds, retains moisture, and insulates roots without suffocating them. Never exceed 4 inches.

Is bulk or bagged mulch cheaper?

Bulk delivery is usually 40–60% cheaper per cubic yard. A cubic yard of bulk mulch costs $30–65 delivered, while the equivalent in bags costs $80–120. Bags are more convenient for small areas.

How much area does one cubic yard cover?

One cubic yard covers about 162 sq ft at 2 inches deep, 108 sq ft at 3 inches deep, and 81 sq ft at 4 inches deep.

When is the best time to mulch?

Late spring (after soil warms) is ideal. Mulching too early can delay soil warming. A fall application helps insulate roots for winter. Refresh in spring as needed.

What type of mulch is best?

Hardwood mulch is the most popular and lasts 1–2 years. Cedar mulch repels insects and lasts longer. Pine bark is acidic and good for acid-loving plants. Rubber mulch is permanent but does not enrich soil.

336 × 280 Large Rectangle

300 × 250 Medium Rectangle

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Disclaimer: This calculator is provided for informational and educational purposes only. Results are estimates and should not be used as a substitute for professional advice. RediCalc.com makes no guarantees regarding the accuracy, completeness, or suitability of any calculations. Always consult a qualified professional before making financial, health, construction, or other important decisions.

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