Mulch & Dirt Calculator
Estimate the total cubic yards of mulch, topsoil, or compost required for your garden beds and landscaping projects. Strategic organic planning.
Cubic Yards (Bulk)
2 cu-ft Bags
3 cu-ft Bags
Bulk vs. Bagged Material
Mulch and topsoil are typically distributed in either bulk (cubic yards) or bags (cubic feet). Bulk delivery is almost always more cost-effective for projects exceeding 2 cubic yards, while bagged material provides easier transport to inaccessible areas like backyards or steep slopes.
Standard Layer
A 3-inch layer is the industry standard for weed suppression and moisture retention. Refreshing an existing bed usually requires only 1 to 2 inches.
Play Area Safety
Wood chips and play mulch should be installed at a depth of 6 to 9 inches to provide adequate impact absorption for playground safety.
Volume Formula
Bulk Estimation Logic
Yards = (Length × Width × Depth) ÷ 324
Where Depth is in inches. This shortcut converts square footage and inches directly to cubic yards.
Professional Best Practices
- Avoid 'Mulch Volcanoes' around tree trunks
- Allow for 10-20% settling after rainfall
- Use a tarp for bulk driveway deliveries
- Edge beds before spreading for a clean look
Settling & Aging
Organic materials like cedar mulch or pine bark will decompose and settle by roughly 10% to 20% in the first few months. Always round up your estimate slightly to account for this natural compaction and material loss.
Material Requirements (3" Depth)
Area (sq ft) Cubic Yards 2 cu-ft Bags 100 0.93 13 500 4.63 63 1,000 9.26 125 2,000 18.52 250 Frequently Asked Questions