Mulch for 100 square feet, by depth
| Depth | Cubic yards | Cubic feet | 2 ft³ bags | 3 ft³ bags |
|---|---|---|---|---|
| 2 in | 0.62 | 16.7 | 9 | 6 |
| 3 in | 0.93 | 25.0 | 13 | 9 |
| 4 in | 1.23 | 33.3 | 17 | 12 |
What 100 square feet looks like
- A square about 10.0 × 10.0 ft.
- A 4 ft wide border that is 25 ft long, or a 3 ft wide border 33 ft long.
- A round bed about 11.3 ft across.
Bulk or bags for 100 ft²?
At 0.93 cubic yards, bags are the simplest option. 13 bags of 2 ft³ fits in most cars, and many suppliers charge a delivery fee or have a minimum for bulk that cancels the saving.
Want to change anything else? The calculator above is the full Mulch Calculator: edit any number and the results update instantly.
Tools & materials for this project
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Frequently asked questions
How many bags of mulch for 100 square feet?
At the usual 3 inch depth you need 13 bags of 2 ft³ (or 9 bags of 3 ft³). At 2 inches it is 9 bags of 2 ft³, and at 4 inches 17 bags.
How many cubic yards of mulch for 100 square feet?
0.93 cubic yards at 3 inches deep, 0.62 at 2 inches and 1.23 at 4 inches. Round up to the next quarter yard when you order.
How deep should I spread mulch over 100 square feet?
Two to three inches is right for most beds. Keep it a few inches back from tree trunks and stems, and top up with an inch or so each year.
Related sizes and guides
Estimates only. Results assume standard materials and simple shapes. Supplier products vary, and the final call on quantity, structure and safety is yours. Check your local code and your supplier's guidance before ordering.