How Much Mulch for a 10×10 Bed?
Cubic feet, cubic yards and bag counts for a 10 ft × 10 ft garden bed at 2, 3 and 4 inches deep.
Quick answer
A 10×10 ft bed (100 ft²) at the common 3-inch depth needs 25.0 ft³ = 0.93 cubic yards of mulch — 13 bags of 2 ft³ or 9 bags of 3 ft³.
Formula & worked math
Cubic yards = cubic feet ÷ 27
Bags = cubic feet ÷ bag size(ft³), rounded up
- Area: 10 × 10 = 100 ft²
- Volume at 3 in: 100 × 3 ÷ 12 = 25 ft³
- Cubic yards: 25 ÷ 27 = 0.926 yd³
- 2 ft³ bags: 25 ÷ 2 = 12.5 → 13 bags; 3 ft³ bags: 25 ÷ 3 = 8.33 → 9 bags
Mulch for a 10×10 bed by depth
| Depth | ft³ | yd³ | 2 ft³ bags | 3 ft³ bags |
|---|---|---|---|---|
| 2 in | 16.7 | 0.62 | 9 | 6 |
| 3 in | 25.0 | 0.93 | 13 | 9 |
| 4 in | 33.3 | 1.23 | 17 | 12 |
For other bed sizes or shapes, use the mulch calculator.
Bags or bulk?
Bulk mulch is sold by the cubic yard. At under one cubic yard, a 10×10 bed is usually a bagged job: bags are easy to carry, and many landscape suppliers have delivery fees or minimums that outweigh the savings for this amount. If you are mulching several beds, add up the cubic feet and compare: one cubic yard equals 13.5 bags of 2 ft³.
Assumptions & tips
- Bag sizes of 2 ft³ and 3 ft³ are the common retail sizes; check the bag label.
- 2–3 inches is a widely recommended depth for weed suppression and moisture retention; 4 inches suits paths or fresh beds with heavy weed pressure. Fresh mulch settles, so a little extra may be needed later.
- Keep mulch a few inches away from tree trunks and plant stems — piling it against bark invites rot.
- Topping up an existing layer? Subtract the depth already there before calculating.
FAQ
How many bags of mulch do I need for a 10x10 area?
At 3 inches deep: 25 ft³, so 13 bags of 2 ft³ or 9 bags of 3 ft³. At 2 inches: 9 bags of 2 ft³.
How many cubic yards of mulch for a 10x10 bed?
At 3 inches deep, 25 ÷ 27 = 0.93 cubic yards. At 2 inches, 0.62; at 4 inches, 1.23.
How many 2 cubic foot bags of mulch are in a yard?
27 ÷ 2 = 13.5 bags per cubic yard.
Last updated: October 12, 2026.