Landscaping
How many bags of mulch for 100 square feet?
Quick Answer
For 100 square feet at 3 inches deep, you need about 6–7 bags of mulch (2 cubic foot bags) or roughly 0.93 cubic yards in bulk. At 2 inches deep, you need 4–5 bags. Standard 2 cu ft bags cover about 8 sq ft at 3" deep.
Quick Reference Table
| Depth | Bags for 100 sq ft |
|---|---|
| 2 inches | 4–5 bags (2 cu ft bags) |
| 3 inches | 6–7 bags (2 cu ft bags) |
| 4 inches | 9–10 bags (2 cu ft bags) |
How to Calculate It Yourself
- 1
Calculate cubic feet: 100 sq ft × (3" ÷ 12) = 100 × 0.25 = 25 cu ft.
- 2
Divide by bag size: 25 cu ft ÷ 2 cu ft per bag = 12.5 → 13 bags.
- 3
Alternatively in cubic yards: 25 ÷ 27 = 0.93 yd³ — order 1 cubic yard bulk.
Pro Tip
A 2 cubic foot bag covers about 8 square feet at 3 inches deep. For quick math: divide your square footage by 8 to get bag count at 3-inch depth.
Need an exact number for your specific dimensions?
Use the Mulch Calculator →