Mulch for a 20×20 area
3.7 cubic yards (50 bags)
of mulch for 400 sq ft at 3 inches deep: 100 cu ft, or 50 bags of 2 cu ft.
A 20×20 foot area is 400 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 20×20 by depth
| Depth | Cubic yards | Cubic feet | 2 cu ft bags | 3 cu ft bags |
|---|---|---|---|---|
| 1 in | 1.23 | 33.3 | 17 | 12 |
| 2 in | 2.47 | 66.7 | 34 | 23 |
| 3 in | 3.7 | 100 | 50 | 34 |
| 4 in | 4.94 | 133.3 | 67 | 45 |
| 6 in | 7.41 | 200 | 100 | 67 |
How it’s worked out
- 20 × 20 = 400 sq ft.
- 400 × 3 in ÷ 12 = 100 cu ft.
- 100 ÷ 27 = 3.704 cu yd, or 100 ÷ 2 = 50 bags of 2 cu ft (rounded up).
Change the numbers
Other bed sizes
- 15×20 area
- 20×25 area
- 12×20 area
- 10×20 area
- 20×30 area
- 8×20 area
- 6×20 area
- 5×20 area
- 4×20 area
- 3×20 area
- 2×20 area
- 20×40 area
Questions
- How much mulch do I need for a 20×20 area?
- 3.7 cubic yards at 3 inches deep, or 50 bags of 2 cu ft. At 2 inches it is 2.47 yards (34 bags).
- How many bags of mulch for 20×20?
- 50 bags of 2 cu ft or 34 bags of 3 cu ft at 3 inches deep.
- Is bulk or bagged mulch cheaper for 20×20?
- Bagged: about $200 for 50 bags. Bulk: about $148 for 3.7 yards, plus delivery. Bulk usually wins above 2 or 3 yards.