A cubic yard of mulch contains exactly 27 cubic feet. This single conversion unlocks everything else: how many bags to buy, how much a yard covers, and how to compare bulk vs. bagged prices. Let's break it all down.
Why 27 Cubic Feet?
"Cubic yard" means a cube with sides of one yard (3 feet) each. Volume = 3 ft × 3 ft × 3 ft = 27 cubic feet. That's it — no tricks. The same math applies to topsoil, gravel, or any bulk material sold by the yard.
Yards to Bags Conversion Table
Now that you know 1 yard = 27 cubic feet, here's how many bags of each common size you need:
| Cubic Yards | Cubic Feet | 1.5 cu ft bags | 2 cu ft bags | 3 cu ft bags |
|---|---|---|---|---|
| 0.5 yd³ | 13.5 ft³ | 9 bags | 7 bags | 5 bags |
| 1 yd³ | 27 ft³ | 18 bags | 14 bags | 9 bags |
| 1.5 yd³ | 40.5 ft³ | 27 bags | 21 bags | 14 bags |
| 2 yd³ | 54 ft³ | 36 bags | 27 bags | 18 bags |
| 3 yd³ | 81 ft³ | 54 bags | 41 bags | 27 bags |
| 5 yd³ | 135 ft³ | 90 bags | 68 bags | 45 bags |
Bag counts rounded up to the nearest whole bag.
Coverage: How Much Area Does a Yard of Mulch Cover?
How far a cubic yard of mulch spreads depends entirely on depth. Here's the coverage at the most common depths:
| Depth | Coverage per Yard | Best For |
|---|---|---|
| 1 inch | 324 sq ft | Top-dressing existing mulch |
| 2 inches | 162 sq ft | Light weed suppression |
| 3 inches ✓ | 108 sq ft | Flower beds, most garden areas |
| 4 inches | 81 sq ft | Around trees, paths |
Bulk vs. Bagged: Which Is Cheaper?
Knowing the 27 cubic feet conversion also lets you compare prices fairly:
- Bulk mulch at $35/yard = $1.30 per cubic foot
- Bagged mulch at $5 per 2 cu ft bag = $2.50 per cubic foot
Bulk is nearly half the price per cubic foot. The catch: bulk requires a truck or delivery and you get the full yard at once. For small beds under 0.5 yards (13 cubic feet), bags are more practical.
Skip the math — use the calculator
Enter your area and depth and get cubic yards, cubic feet, and bag counts instantly.
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