How Much Mulch Do I Need for a 10x10 Garden? (Chart + Calc)
A 10x10 garden bed needs 25 cu ft of mulch — 13 bags or 0.93 yards at 3 inches deep. Full chart and bags vs bulk advice.
Quick answer: A 10×10 ft garden bed at 3 inches deep needs 25 cu ft of mulch — about 13 bags (2 cu ft each) or 0.93 cubic yards. Use the mulch calculator for any size.
Mulch math for a 10x10 bed
Mulch is sold by volume. The formula: length × width × depth (in feet).
- Area: 10 × 10 = 100 sq ft
- Depth: 3 inches = 0.25 ft
- Volume: 100 × 0.25 = 25 cu ft
- In yards: 25 ÷ 27 = 0.93 cubic yards
- In 2 cu ft bags: 25 ÷ 2 = 12.5 → 13 bags
Mulch needed by bed size (3-inch depth)
| Bed size | Cubic feet | 2 cu ft bags | Cubic yards |
|---|---|---|---|
| 4×8 (narrow bed) | 8 | 4 | 0.30 |
| 5×10 | 12.5 | 7 | 0.46 |
| 10×10 | 25 | 13 | 0.93 |
| 10×20 | 50 | 25 | 1.85 |
| 12×25 | 75 | 38 | 2.78 |
Bags or bulk?
Under 1 cubic yard, bags are fine. Above that, order bulk mulch by the yard — it's typically half the cost of bags and delivered in one shot. A cubic yard covers about 108 sq ft at 3 inches.
Mulch depth by purpose
| Purpose | Depth |
|---|---|
| Light refresh | 2 inches |
| Standard beds | 3 inches |
| Weed suppression | 4 inches |
FAQ
How many bags of mulch for a 10x10 bed?
At 3 inches deep: 13 bags of 2 cu ft mulch.
How many bags in a cubic yard?
14 bags of 2 cu ft mulch make about a cubic yard (27 cu ft).
How often should I re-mulch?
Organic mulch breaks down — top up 1-2 inches every 1-2 years.
Need a different size?
Our free calculators give you the exact answer in seconds.