Mulch for a 5×20 area

0.93 cubic yards (13 bags)

of mulch for 100 sq ft at 3 inches deep: 25 cu ft, or 13 bags of 2 cu ft.

A 5×20 foot area is 100 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 5×20 by depth

DepthCubic yardsCubic feet2 cu ft bags3 cu ft bags
1 in0.318.353
2 in0.6216.796
3 in0.9325139
4 in1.2333.31712
6 in1.85502517

How it’s worked out

  1. 20 × 5 = 100 sq ft.
  2. 100 × 3 in ÷ 12 = 25 cu ft.
  3. 25 ÷ 27 = 0.926 cu yd, or 25 ÷ 2 = 13 bags of 2 cu ft (rounded up).

Change the numbers

Mulch needed

0.93 cubic yards

13 bags of 2 cu ft, or 9 bags of 3 cu ft.

Area100 sq ft
Cubic yards0.93 (about $40 bulk)
Cubic feet25
2 cu ft bags13 (about $52)
3 cu ft bags9

Other bed sizes

Questions

How much mulch do I need for a 5×20 area?
0.93 cubic yards at 3 inches deep, or 13 bags of 2 cu ft. At 2 inches it is 0.62 yards (9 bags).
How many bags of mulch for 5×20?
13 bags of 2 cu ft or 9 bags of 3 cu ft at 3 inches deep.
Is bulk or bagged mulch cheaper for 5×20?
Bagged: about $52 for 13 bags. Bulk: about $40 for 0.93 yards, plus delivery. Bulk usually wins above 2 or 3 yards.

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