Mulch Calculator
Ordering the right amount of mulch prevents waste and repeat trips. This calculator determines the cubic yards needed for your landscape beds based on total area, desired depth, and mulch type, with cost estimates for bulk and bagged options.
Mulch Estimate
Bulk mulch is sold by the cubic yard. One cubic yard covers approximately 162 sq ft at 2 inches deep, 108 sq ft at 3 inches, or 81 sq ft at 4 inches. Delivery fees vary by distance and supplier.
Mulch Coverage per Cubic Yard
| Depth | Coverage per Yard | Best For |
|---|---|---|
| 2 inches | 162 sq ft | Annual refresh over existing mulch |
| 3 inches | 108 sq ft | New beds, standard landscape application |
| 4 inches | 81 sq ft | Heavy weed suppression, playground areas |
| 6 inches | 54 sq ft | Walking paths, extreme weed control |
Mulch Type Comparison
| Type | Bulk Cost/Yard | Lifespan | Notes |
|---|---|---|---|
| Hardwood Shredded | $25–$40 | 1–2 years | Most popular; mats well, resists washing |
| Pine Bark | $30–$45 | 1–2 years | Naturally acidic; good for azaleas, blueberries |
| Cedar | $35–$55 | 2–3 years | Natural insect repellent; pleasant aroma |
| Cypress | $30–$45 | 2–3 years | Resists decay; sustainability concerns in some regions |
| Dyed Mulch | $30–$50 | 1–2 years | Color fades; dyes are generally non-toxic |
| Rubber | $80–$150 | 10+ years | ASTM F1292 rated for playgrounds; does not decompose |
| Decorative Stone | $50–$120 | Permanent | Does not retain moisture; heats up in summer |
Frequently Asked Questions
How many bags of mulch equal a cubic yard?
Standard 2-cubic-foot bags: 13.5 bags per cubic yard. For small jobs (under 2–3 yards), bagged mulch may be more practical, but bulk delivery is significantly cheaper per yard for larger projects.
Should I remove old mulch before adding new?
Not usually. If the existing mulch layer is under 3 inches, simply add new mulch on top. If the old layer is thick, compacted, or moldy, rake it to break it up before adding fresh material. Only remove old mulch if it has fungal issues or has built up beyond 4–5 inches total.
Does mulch attract termites?
Mulch does not attract termites, but it creates moisture conditions they favor. Keep mulch at least 6 inches away from foundation walls and siding. Cedar and cypress mulches are naturally more resistant to insects than hardwood or pine.
References & Methodology
- U.S. Environmental Protection Agency (EPA), "WaterSense Water Budget Tool," epa.gov/watersense. — Landscape water budget methodology based on evapotranspiration rates and plant water needs.
- U.S. Department of Agriculture (USDA), "PLANTS Database," plants.usda.gov. — Plant hardiness zones and native species recommendations for sustainable landscaping.
- University Cooperative Extension Services, "Lawn Care and Landscape Maintenance Guides," various state extensions. — Regional fertilization rates, soil amendment calculations, and mulch depth recommendations.
- National Association of Landscape Professionals (NALP), "Industry Benchmarks," landscapeprofessionals.org. — Labor and material cost benchmarks for residential landscape installation and maintenance.
References
- University of California Cooperative Extension — Drip Irrigation in the Home Landscape
- University of California Cooperative Extension — Drip Irrigation for the Home Garden
- University of California Cooperative Extension — Drip Irrigation for Home Gardens (UC ANR Publicatio
- University of Florida IFAS Extension — Drip Irrigation for Landscape Plantings
- University of Florida IFAS Extension — Soil Moisture Sensors for Irrigation Scheduling
- University of Florida IFAS Extension — Mulches for the Landscape
- University of Georgia Cooperative Extension — Soil, Plant and Water Laboratory
- University of California Cooperative Extension — Landscape Plant Water Use