Reference
Mulch coverage chart
Updated May 2026 2 min read
Bookmarkable reference. One cubic yard equals 27 cubic feet — at 3" deep that's 108 sq ft, or roughly a 9 × 12 ft bed.
Square feet per cubic yard, by depth
1"
324 sq ft
2"
162 sq ft
3"
108 sq ft
4"
81 sq ft
6"
54 sq ft
Bag count by bed size (3" deep)
Includes +10% settling buffer.
| Bed (ft) | Sq ft | Bags @ 1.5 | Bags @ 2 | Bags @ 3 |
|---|---|---|---|---|
| 3×3 | 9 | 2 | 2 | 1 |
| 4×4 | 16 | 3 | 3 | 2 |
| 4×8 | 32 | 6 | 5 | 3 |
| 5×10 | 50 | 10 | 7 | 5 |
| 8×10 | 80 | 15 | 11 | 8 |
| 10×10 | 100 | 19 | 14 | 10 |
| 10×12 | 120 | 22 | 17 | 11 |
| 10×20 | 200 | 37 | 28 | 19 |
| 15×15 | 225 | 42 | 31 | 21 |
| 20×20 | 400 | 74 | 56 | 37 |
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