A cubic yard of mulch equals 13.5 bags of the standard 2-cubic-foot size sold at Home Depot and Lowe’s. If your bags are 1.5 cubic feet, it takes 18; for big 3-cubic-foot bags, it takes 9. The math is simple: one yard is 27 cubic feet, so divide 27 by the bag size printed on the label.
Bags per yard by bag size
| Bag size | Bags in 1 cubic yard | Bags in 2 yards | Bags in 3 yards |
|---|---|---|---|
| 1.5 cu ft | 18 | 36 | 54 |
| 2 cu ft (standard) | 13.5 | 27 | 40.5 |
| 3 cu ft | 9 | 18 | 27 |
Always check the label before you buy — dyed hardwood mulch usually comes in 2 cu ft bags, but premium and pine-bark products are often 1.5 or 3 cu ft, and the bags look nearly identical on the shelf.
Bagged or bulk: which should you buy?
Price is the main difference. Bulk mulch typically runs $25–$50 per cubic yard delivered, while 13.5 standard bags at $3–$5 each work out to $40–$68 for the same volume — roughly 30–50% more per yard. Bags win on convenience: they stack in a sedan trunk, store for next season, and spread cleanly with no driveway pile.
A practical rule: below half a yard (about 7 bags), just buy bags. Above a full yard, get bulk delivered — the savings outrun the delivery fee quickly.
How many bags do you actually need?
Measure your bed’s length and width in feet, pick a depth (3 inches for new beds, 2 for refreshes), then: length × width × depth in feet ÷ 2 gives you the 2-cu-ft bag count. A 10 × 12 ft bed at 3 inches is 10 × 12 × 0.25 = 30 cubic feet = 15 bags.
Or skip the math — our mulch calculator converts any bed size into yards and all three bag sizes at once, with a 10% overage suggestion built in.