You're standing in the mulch aisle with a note that says "1.5 cubic yards" — and the shelf in front of you is stacked with bags labeled "2 cubic feet." The numbers don't match up, the conversion isn't obvious, and you don't want to load up the wrong amount and make a second trip.
Here's the exact conversion, a quick reference table for every bag size, and a way to calculate bags for your specific project without any guesswork.
The Short Answer: 13.5 Bags Per Cubic Yard
One cubic yard equals 27 cubic feet. A standard bag of mulch holds 2 cubic feet — so you need 27 ÷ 2 = 13.5 bags per cubic yard. Since you can't buy half a bag, always round up to 14.
This is the most common bag size at Home Depot, Lowe's, and Menards. Most coverage charts you'll find online are written around this size. If the bags on your shelf are a different size, the number changes — see below.
Bag Size Quick Reference
Different sizes mean different quantities per cubic yard. Here's the full breakdown:
| Bag Size | Bags per Cubic Yard | Where You'll See It |
|---|---|---|
| 1.5 cu ft | 18 bags | Premium/colored mulch |
| 2 cu ft | 13.5 → buy 14 | Standard size, most stores |
| 3 cu ft | 9 bags | Value/jumbo, club stores |
Cedar and hardwood mulch often come in 3 cu ft bags. Dyed or premium decorative mulch tends to use 1.5 cu ft. If the bag doesn't show a cubic foot measurement, check the weight tag — most mulch bags run 20–40 lbs, which you can use to estimate volume.
How to Calculate Bags for Your Specific Bed
You don't need to figure out cubic yards first. Here's the direct path: Length (ft) × Width (ft) × Depth (in) ÷ 12 ÷ 27 = cubic yards. Multiply that by 13.5 for standard 2-cu-ft bags.
Example: a 15 × 10 ft bed at 3 inches → 15 × 10 × 3 ÷ 12 ÷ 27 = 1.39 cu yd × 13.5 = 18.7 → buy 19 bags. Add one more if the edges are rough.
For any bed size or bag size, use our free mulch calculator — select your bag size from the dropdown and it handles the conversion instantly.
Bags vs. Bulk: When Does Each Make Sense?
Bags cost more per unit but they're available any time, no minimums, no scheduling. At $5.98 per 2-cu-ft bag, one cubic yard of bagged mulch runs about $81. Bulk mulch typically costs $25–$45 per cubic yard delivered, depending on type and region.
The break-even is usually around 2–3 cubic yards. Under that, bags win on convenience. For projects over 3–4 cubic yards, bulk almost always saves enough money to cover the delivery fee and then some. Most bulk suppliers also have a 2-yard minimum, so very small jobs won't qualify anyway.
Frequently Asked Questions
Why does mulch come in cubic feet but landscapers quote cubic yards?
Bags use cubic feet because it sounds like a smaller, more reasonable price point. Landscapers and bulk suppliers use cubic yards as the standard for loose materials. One cubic yard equals 27 cubic feet. The units refer to the same thing — the math is just applied differently.
How many bags of mulch do I need for a 10×10 garden bed?
At 3 inches deep, a 10×10 ft bed needs about 0.93 cubic yards, which equals 13 standard 2-cubic-foot bags (round up from 12.5). At 2 inches deep you'd need 9 bags. Always add one extra bag as a buffer for uneven spots or edges you missed.
Is bagged mulch the same quality as bulk?
It depends on the supplier, not the packaging. Many sell the same material both ways. Bulk mulch can be fresher since it hasn't sat sealed in plastic. Bagged mulch offers more consistent sizing and easier storage if you don't use it all in one go.