Mulch for a 20×40 area
7.41 cubic yards (100 bags)
of mulch for 800 sq ft at 3 inches deep: 200 cu ft, or 100 bags of 2 cu ft.
A 20×40 foot area is 800 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 20×40 by depth
| Depth | Cubic yards | Cubic feet | 2 cu ft bags | 3 cu ft bags |
|---|---|---|---|---|
| 1 in | 2.47 | 66.7 | 34 | 23 |
| 2 in | 4.94 | 133.3 | 67 | 45 |
| 3 in | 7.41 | 200 | 100 | 67 |
| 4 in | 9.88 | 266.7 | 134 | 89 |
| 6 in | 14.81 | 400 | 200 | 134 |
How it’s worked out
- 40 × 20 = 800 sq ft.
- 800 × 3 in ÷ 12 = 200 cu ft.
- 200 ÷ 27 = 7.407 cu yd, or 200 ÷ 2 = 100 bags of 2 cu ft (rounded up).
Change the numbers
Other bed sizes
- 15×40 area
- 20×30 area
- 20×50 area
- 25×40 area
- 20×25 area
- 12×40 area
- 10×40 area
- 20×20 area
- 30×40 area
- 8×40 area
- 15×20 area
- 6×40 area
Questions
- How much mulch do I need for a 20×40 area?
- 7.41 cubic yards at 3 inches deep, or 100 bags of 2 cu ft. At 2 inches it is 4.94 yards (67 bags).
- How many bags of mulch for 20×40?
- 100 bags of 2 cu ft or 67 bags of 3 cu ft at 3 inches deep.
- Is bulk or bagged mulch cheaper for 20×40?
- Bagged: about $400 for 100 bags. Bulk: about $296 for 7.41 yards, plus delivery. Bulk usually wins above 2 or 3 yards.