Mulch Coverage per Bag
See how far one bag goes at common depths. Change the Unit System or Bag Size above to update the table.
| Depth | Coverage (primary) | Coverage (alt) |
|---|
Coverage is approximate. Actual spread varies with mulch chunk size, compaction, and surface irregularities. Add 5–10% extra.
Mulch Calculator – Volume, Bags, Loads & Cost
Enter your area, choose a mulch depth, and add a waste factor to account for settling and uneven surfaces. The calculator returns mulch volume in m³/yd³, the number of bags (2 cu ft, 3 cu ft, or 50–70 L), plus convenient wheelbarrow and truckload equivalents. If you add pricing, it estimates total cost for both bagged and bulk mulch so you can pick the most cost-effective option.
Recommended Mulch Depths
- Decorative cover / light refresh: 2 in (50 mm)
- Garden beds & moisture control (most common): 3 in (75 mm)
- Weed suppression & paths: 4 in (100 mm)
- Around trees: 2–4 in (50–100 mm), keep clear of the trunk flare
Mulch Buying Tips
- Bag vs bulk: Bulk is often cheaper for larger areas; bags are convenient for small jobs.
- Coverage varies: Chunk size and compaction change how far a bag spreads; order 5–10% extra.
- Keep mulch off trunks/stems: Leave a donut-shaped gap to prevent rot.
- Top up annually: Mulch breaks down and enriches soil, so expect minor annual top-ups.
How to Use This Mulch Calculator
- Select your unit system (Imperial or Metric) and the shape of your area.
- Enter dimensions (or diameter) and pick a target depth or set a custom depth.
- Adjust the waste/overage to cover settling and uneven ground.
- Choose a bag size or plan for bulk delivery; add pricing to compare costs.
Related Landscaping & Aggregate Calculators
FAQs
How many bags of mulch do I need per cubic yard?
One cubic yard is 27 cu ft. That’s about 13.5 bags at 2 cu ft each, or 9 bags at 3 cu ft each.
How much area does a 2 cu ft bag cover?
At 3 inches deep, one 2 cu ft bag covers ~8 square feet. At 2 inches deep, ~12 square feet.
Should I calculate mulch by weight?
Mulch is typically sold by volume, not weight. Weight varies with wood type and moisture, so volume is the reliable basis.
Important Estimate Disclaimer
The results provided by this calculator are intended as general estimates only and should not be considered precise engineering measurements. Actual material requirements, costs, and quantities can vary significantly based on site conditions, local building codes, soil type, reinforcement requirements, climate exposure, and the intended use of your project.
These calculators are designed to help you plan and budget your project more effectively, but they do not replace professional advice from a qualified contractor, engineer, or building inspector. Always verify your calculations and assumptions with trained professionals before placing material orders or commencing construction.
For more information on the assumptions, formulas, and data used in these tools, see our Data Sources and Methodology pages.
Material estimates, cost figures, and volume calculations are approximate and may not reflect your actual requirements. Always double-check dimensions and project-specific needs, and consider adding a contingency allowance for waste, over-excavation, and unforeseen conditions.
If you are unsure about any aspect of your project — including structural requirements, reinforcement needs, drainage, or load-bearing capacity — consult with a licensed professional before proceeding.