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. If you are still choosing between materials rather than quantities, compare mulch vs rock for landscaping first.
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. Bag labels are printed in cubic feet while bulk is sold by the yard, so it pays to know how many cubic feet are in a cubic yard before you compare prices.
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.