Mulch is sold two ways: by the bag at hardware stores or in bulk by the cubic yard from landscape suppliers. The price per cubic yard is very different between the two, and for any project larger than a couple of flower beds, the math almost always favors bulk delivery. But for small patches, bags are more convenient and there is no delivery fee.
Here is how to convert between bags and cubic yards, and how to figure out which buying method makes sense for your project.
The conversion math
One cubic yard = 27 cubic feet. Bags come in two common sizes:
2 cubic foot bags: 27 / 2 = 13.5 bags per cubic yard. Since you cannot buy half a bag, order 14 bags per cubic yard needed.
3 cubic foot bags: 27 / 3 = 9 bags per cubic yard exactly.
Some suppliers also sell 1.5 cubic foot bags (common with colored or specialty mulch): 27 / 1.5 = 18 bags per cubic yard.
Quick reference:
| Bag size | Bags per cubic yard |
|---|---|
| 1.5 cu ft | 18 bags |
| 2 cu ft | 14 bags (13.5, round up) |
| 3 cu ft | 9 bags |
How much mulch covers what area
Mulch depth depends on the purpose. Decorative mulch for flower beds typically goes 2 to 3 inches deep. Weed suppression works best at 3 to 4 inches. More than 4 inches traps moisture, promotes mold, and can kill plants by overheating roots.
| Mulch depth | 1 cubic yard covers |
|---|---|
| 1 inch | 324 sq ft |
| 2 inches | 162 sq ft |
| 3 inches | 108 sq ft |
| 4 inches | 81 sq ft |
For a 300 square foot bed at 3 inches deep, you need 300 / 108 = 2.8 cubic yards, which rounds up to 3 cubic yards. In 2 cubic foot bags, that is 3 x 14 = 42 bags.
Bags vs bulk: the cost comparison
The price difference is significant on larger projects. Typical pricing:
Bagged mulch: $4 to $7 per 2 cu ft bag. That is $54 to $95 per cubic yard in bags.
Bulk mulch delivery: $25 to $45 per cubic yard for the mulch, plus $50 to $100 delivery fee.
Break-even point: at $30 per yard bulk and $5 per bag, bulk mulch becomes cheaper at about 2.5 to 3 cubic yards if delivery is $75. For larger projects, every yard over the break-even saves you $25 to $65 per cubic yard.
For anything under 2 cubic yards (about 27 bags of the 2 cu ft size), bags are often the right call: no minimum order, no delivery fee, and you can load them yourself. For anything over 3 cubic yards, call a landscape supplier.
Types of mulch and what they cost
Shredded wood or bark mulch: The most common. $25 to $45 per yard bulk. Breaks down over 2 to 3 years and needs annual top-dressing.
Cedar or cypress mulch: Natural insect resistance and slower decomposition. $35 to $60 per yard. Good for areas around foundations.
Dyed mulch (red, brown, black): Colorfast for 1 to 2 seasons before fading. Same coverage as natural mulch. Usually $30 to $50 per yard. Avoid using colored mulch near plants that are sensitive to dye runoff.
Pine straw: More common in the Southeast. Sold by the bale, not by the cubic yard. One bale of pine straw covers about 35 to 50 square feet at 3 inches. Pine straw acidifies soil slightly as it breaks down, which benefits acid-loving plants like azaleas and blueberries.
Rubber mulch: Long lasting (10 or more years), no decomposition. More expensive at $8 to $12 per square foot installed, but requires no annual replacement. Good around play equipment.
How often to top-dress
Organic mulch breaks down. After 1 to 2 years, most beds need a light top-dressing of 1 to 1.5 inches to restore depth and appearance. You do not need to remove the old mulch first; just add on top as it compresses.
The mulch calculator calculates cubic yards, bag count, and cost for any bed dimensions and depth. If you are comparing the cost between bulk and bags for a specific project, the calculator shows the material cost for both options side by side.
Frequently Asked Questions
How many bags of mulch do I need for 100 square feet?
At 3 inches deep (the standard for weed suppression), 100 square feet needs about 0.93 cubic yards. That is roughly 13 bags of 2 cubic foot bags, or 9 bags of 3 cubic foot bags. At 2 inches deep, you need about 9 bags of 2 cubic foot bags for the same area. Use the exact bag size on the label to calculate your specific project.
What is cheaper: bagged or bulk mulch?
Bulk mulch is almost always cheaper per cubic yard for projects over 3 cubic yards. Bagged mulch runs $54 to $95 per cubic yard (using 2 cubic foot bags at $4 to $7 each). Bulk mulch costs $25 to $45 per cubic yard plus delivery. The delivery fee, typically $50 to $100, is what makes bagged mulch competitive for small projects. Under 2 cubic yards, bags are often more convenient with no delivery scheduling.
How much does a 2 cubic foot bag of mulch weigh?
About 20 to 40 pounds depending on the material and how dry it is. Shredded hardwood and wood chips are lighter. Rubber mulch runs 40 to 50 pounds per 2 cubic foot bag. Wet mulch from outdoor storage can be heavier than the label suggests. If you are loading bags yourself, assume 25 to 30 pounds per bag for planning purposes.
Can I store leftover mulch bags over winter?
Yes. Store bags in a dry, covered location. Mulch stored in sealed bags stays usable for 1 to 2 years. If bags are stored outside and get wet repeatedly, the mulch may start to decompose in the bag and develop mold. A garage, shed, or covered pallet works well for long-term storage.
How many bags of mulch fit in a pickup truck?
A standard full-size pickup bed (8 feet long) holds about 1 to 1.5 cubic yards in bulk mulch, or about 20 to 30 bags of 2 cubic foot bags depending on how you stack them. Keep bulk loads under the truck’s payload rating; mulch can weigh 800 to 1,000 pounds per cubic yard when wet. Bags are easier to stack and transport without going over payload limits.
What is the minimum order for bulk mulch delivery?
Most suppliers have a minimum of 1 to 3 cubic yards, though this varies by region. Delivery fees typically run $50 to $100 regardless of load size, which is why small loads are often not cost-effective to have delivered. Some suppliers offer will-call pickup where you load it yourself, which eliminates the delivery fee and allows for smaller quantities. Call local landscape suppliers to compare pricing for your specific volume.