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Mulch Calculator – Coverage in Cubic Feet & Yards

3
0
0
0
Area Shape
Mulch Depth
inches
2–4 inches is ideal for most landscaping mulch. 3″ is the sweet spot for weed control & moisture retention.
Coverage Area
40
sq ft
Cubic Feet
10.00
ft³ needed
Cubic Yards
0.37
yd³ — bulk order unit
Bags Needed
5
based on 2 ft³ bags
Quick Reference
Depth 1 yd³ covers Bags (2 ft³) per yd³
1 inch324 sq ft13.5 ≈ 14
2 inches162 sq ft13.5 ≈ 14
3 inches ★108 sq ft13.5 ≈ 14
4 inches81 sq ft13.5 ≈ 14
6 inches54 sq ft13.5 ≈ 14

Note: 1 cubic yard = 27 cubic feet. Bagged mulch typically comes in 2 ft³ bags, so ~13.5 bags = 1 cubic yard.

Frequently Asked Questions

Measure the length and width of your garden bed in feet (for rectangular areas) or the diameter (for circular areas). Multiply the area by your desired mulch depth in feet (inches ÷ 12). This gives you cubic feet. Divide by 27 to convert to cubic yards — the standard unit for bulk mulch orders. Our calculator above does all of this instantly.

Formula (Rectangle): Length(ft) × Width(ft) × Depth(in) ÷ 12 = Cubic Feet

1 cubic yard = 27 cubic feet. Bagged mulch is usually sold in cubic feet (commonly 2 ft³ per bag), while bulk mulch from landscape suppliers is sold by the cubic yard. For large projects, buying in cubic yards is typically much more economical. Use the "Cubic Yards" result above to place bulk orders.

  • Flower beds & landscaping: 2–3 inches — the industry standard for moisture retention and weed suppression.
  • Around trees & shrubs: 2–4 inches, but keep mulch 2–3 inches away from the trunk to prevent rot.
  • Vegetable gardens: 2–3 inches of organic mulch like straw or shredded leaves.
  • Playgrounds (rubber mulch): 4–6 inches for adequate fall protection.
  • Heavy weed suppression: 4+ inches, though avoid exceeding 6 inches as it can suffocate plant roots.

Most bagged mulch contains 2 cubic feet per bag. Since 1 cubic yard = 27 cubic feet, you need approximately 13.5 bags (round up to 14) to equal one cubic yard. Some premium brands sell 1.5 ft³ or 3 ft³ bags — always check the label. For projects over 5 cubic yards, bulk delivery is usually cheaper than buying individual bags.

Absolutely! The math is identical — volume is volume. Simply input your area dimensions and desired depth (in inches), and the calculator works for topsoil, gravel, sand, compost, wood chips, rubber mulch, pine straw, or any bulk landscaping material. The bag count estimate assumes 2 ft³ bags, so adjust accordingly for different bag sizes.

Break the area into smaller rectangles, squares, and circles. Calculate each section separately using our calculator, then add the cubic yard totals together. For curved beds, approximate with a rectangle that roughly matches the average width. It's always wise to order 5–10% extra to account for irregularities, settling, and spillage.

  • Shredded Hardwood: Most popular; decomposes slowly; rich dark color; 2–3″ depth.
  • Cedar Mulch: Natural insect-repellent oils; pleasant aroma; reddish tone; 2–3″ depth.
  • Pine Bark Nuggets: Long-lasting; doesn't wash away easily; 3–4″ depth recommended.
  • Pine Straw: Lightweight; excellent for slopes; acidic — great for azaleas & blueberries; 3–4″ depth.
  • Rubber Mulch: Made from recycled tires; 4–6″ depth; ideal for playgrounds; doesn't decompose.
  • Cocoa Mulch: Fine texture; rich color; 1–2″ depth; toxic to dogs — avoid if you have pets.
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