400 sq ft: mulch by depth
| Depth | Cu ft | Cu yd | 2 cu ft bags |
|---|---|---|---|
| 1″ | 33.3 | 1.23 | 17 |
| 2″ | 66.7 | 2.47 | 34 |
| 3″ | 100.0 | 3.70 | 50 |
| 4″ | 133.3 | 4.94 | 67 |
Worked example
400 sq ft × 3 in ÷ 12 = 100.0 cu ft = 3.70 cubic yards. In 2 cu ft bags that is 50 bags; in 3 cu ft bags, 34. Bulk delivery by the yard is usually cheaper at this volume; compare local prices.
Frequently asked questions
How many bags of mulch for 400 sq ft?
50 bags of 2 cu ft at 3 inches deep.