Cost Calculator AI
Construction & ContractorsLandscape Beds

Mulch Calculator

Calculate landscape mulch in cubic yards, 2 cu ft and 3 cu ft bags, and compare bulk yard delivery against bagged retail pricing.

Calculation Results

Mulch Coverage Formula

Cubic Yards = (Square Footage × Depth in / 12) / 27 | 2 Cu Ft Bags = Cubic Feet / 2
  • Recommended Depth: 2 to 3 inches for existing beds, 3 to 4 inches for new landscape beds.
  • 2 Cu Ft Bags: 13.5 bags per cubic yard (27 cu ft / 2 cu ft).
  • 3 Cu Ft Bags: 9 bags per cubic yard (27 cu ft / 3 cu ft).

Step-by-Step Worked Example

Scenario: Covering 600 sq ft of flower beds with 3 inches of hardwood mulch

Calculation Steps:

  1. Cubic Feet = 600 × (3 / 12) = 150 cu ft
  2. Cubic Yards = 150 / 27 = 5.56 cu yd
  3. 2 Cu Ft Bags Needed = 150 / 2 = 75 bags
  4. 3 Cu Ft Bags Needed = 150 / 3 = 50 bags
  5. Bulk Cost = 5.56 cu yd × $38.00 = $211.28
  6. Bagged Cost = 75 bags × $3.65 = $273.75
Result: The project requires 5.56 cubic yards (75 2-cu-ft bags). Buying bulk saves over $62.

How to Use This Calculator

  1. 1Enter total square footage of all garden beds.
  2. 2Select depth (3 inches is ideal for weed prevention and moisture retention).

Assumptions & Limitations

  • Estimates are based on standard national averages and current prevailing construction materials and contractor rates.
  • Actual trade bids may fluctuate according to local building code requirements, permit fees, and site topography.
  • Always obtain multiple written bids from licensed, bonded, and insured contractors before commencing work.

Frequently Asked Questions

Can you put too much mulch around trees and plants?

Yes. Mulch deeper than 4 inches can suffocate roots. Never pile mulch against tree trunks in a "mulch volcano", as it invites fungal rot and rodent nesting.

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