Mulch Calculator
Calculate mulch volume and number of bags needed for your landscaping project. Get accurate material estimates in cubic yards and bag counts.
Enter area dimensions (or direct square footage) and mulch depth to calculate volume and bag count needed.
Formula
Volume (yd³) = Area (sq ft) × Depth (inches) ÷ 324 | Bags Needed = Volume × Bags per Cubic Yard
Convert area and depth to cubic yards using standard conversion (1 yd³ = 27 cubic feet or 324 inches of depth over 1 sq ft). Multiply by standard bag density for your mulch type, typically 13.5 two-cubic-foot bags per yard.
Worked Example
Garden bed: 100 ft × 50 ft, 2 inches deep, standard hardwood mulch (13.5 bags/yd³).
Area = 100 × 50 = 5,000 sq ft
Volume = 5,000 × 2 ÷ 324 = 30.86 cubic yards
Bags = 30.86 × 13.5 = 416.6, round up to 417 bags
Order approximately 31 cubic yards or 417 two-cubic-foot bags of mulch.
Frequently Asked Questions
When to use this calculator
- →Planning landscaping projects and estimating mulch quantity
- →Calculating mulch bag counts for small to medium projects
- →Getting bulk mulch delivery estimates in cubic yards
- →Budgeting for seasonal mulch refreshes
Mulch types and applications
Hardwood Mulch
Coverage: 13.5 bags/yd³
General landscaping, flower beds, weed control
Softwood Mulch
Coverage: 13.5 bags/yd³
Budget-friendly, general use, decomposes faster
Cedar Mulch
Coverage: 13.5 bags/yd³
Aromatic, insect repellent, premium option
Rubber Mulch
Coverage: 15-16 bags/yd³
Playgrounds, long-lasting, permanent
Pine Straw
Coverage: ~15 bags/yd³
Acidic soils, natural look, budget option
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Important Note
These are estimates for planning. Actual material needs may vary due to site conditions, cuts, and waste. Verify quantities with your contractor or supplier before ordering.