Mulch for a 30×30 area

8.33 cubic yards (113 bags)

of mulch for 900 sq ft at 3 inches deep: 225 cu ft, or 113 bags of 2 cu ft.

A 30×30 foot area is 900 square feet. Most garden beds need 2 to 3 inches of mulch; a fresh bed or a weedy one benefits from 3 to 4 inches.

Mulch for 30×30 by depth

DepthCubic yardsCubic feet2 cu ft bags3 cu ft bags
1 in2.78753825
2 in5.561507550
3 in8.3322511375
4 in11.11300150100
6 in16.67450225150

How it’s worked out

  1. 30 × 30 = 900 sq ft.
  2. 900 × 3 in ÷ 12 = 225 cu ft.
  3. 225 ÷ 27 = 8.333 cu yd, or 225 ÷ 2 = 113 bags of 2 cu ft (rounded up).

Change the numbers

Mulch needed

8.33 cubic yards

113 bags of 2 cu ft, or 75 bags of 3 cu ft.

Area900 sq ft
Cubic yards8.33 (about $333 bulk)
Cubic feet225
2 cu ft bags113 (about $452)
3 cu ft bags75

Other bed sizes

Questions

How much mulch do I need for a 30×30 area?
8.33 cubic yards at 3 inches deep, or 113 bags of 2 cu ft. At 2 inches it is 5.56 yards (75 bags).
How many bags of mulch for 30×30?
113 bags of 2 cu ft or 75 bags of 3 cu ft at 3 inches deep.
Is bulk or bagged mulch cheaper for 30×30?
Bagged: about $452 for 113 bags. Bulk: about $333 for 8.33 yards, plus delivery. Bulk usually wins above 2 or 3 yards.

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