One yard of mulch equals 27 cubic feet
A cubic yard is a standard measurement used for bulk materials like mulch, soil, and gravel. One cubic yard measures 3 feet long by 3 feet wide by 3 feet deep, which equals 27 cubic feet total. When a landscaping supplier or garden center quotes you a price per yard, they are selling you 27 cubic feet of material.
This matters because most home gardeners think in bags or small quantities, but mulch is almost always priced and delivered by the yard. Understanding the conversion helps you order the right amount and avoid either running short or paying for more than you need.
Key Takeaways
- One cubic yard of mulch contains exactly 27 cubic feet, which is the standard measurement for bulk mulch orders.
- A typical bag of mulch from a garden center holds 2 to 3 cubic feet, so one yard equals roughly 9 to 13 bags depending on bag size.
- Depth matters when calculating how many yards you need—spreading mulch 3 inches deep requires less material than spreading it 4 inches deep over the same area.
- Mulch settles and compacts over time, so ordering slightly more than your calculation suggests prevents thin spots after the first season.
Converting cubic yards to bags of mulch
Most bagged mulch sold at garden centers comes in 2-cubic-foot or 3-cubic-foot bags. If you are buying bags instead of ordering bulk, you can calculate how many you need by dividing 27 by the bag size. A 2-cubic-foot bag means you need about 13 to 14 bags per yard; a 3-cubic-foot bag means you need about 9 bags per yard.
Bagged mulch costs more per cubic foot than bulk mulch, but it works well for small projects—a single planting bed or a few trees. For anything larger than 100 square feet, bulk delivery from a landscape supplier usually costs less overall, even with a delivery fee.
Calculating how many yards you need for your space
To figure out how many yards to order, you need three pieces of information: the length of your bed in feet, the width in feet, and the depth you want the mulch to be in inches. Multiply length times width to get square feet, then use this formula: (square feet × depth in inches) ÷ 324 = cubic yards needed.
For example, a bed that is 10 feet long, 4 feet wide, and you want 3 inches deep: (10 × 4 × 3) ÷ 324 = 0.37 cubic yards. That is less than half a yard, so you would order 1 yard (or buy bags). A bed that is 20 feet long, 6 feet wide, at 3 inches deep: (20 × 6 × 3) ÷ 324 = 1.1 cubic yards, so you would order 1 to 2 yards depending on how full you want it.
Most landscapers recommend spreading mulch 2 to 4 inches deep. Shallower than 2 inches and weeds start breaking through; deeper than 4 inches and you risk trapping moisture against the soil and rotting plant stems. Three inches is the middle ground that works for most gardens.
Why mulch settles after delivery
When mulch is freshly delivered and spread, it looks full and fluffy. Over the first few weeks and months, it settles and compacts as it absorbs water and begins to break down. A yard of mulch that looked like 4 inches deep in July might look like 3 inches deep by September.
This is why many gardeners order 10 to 15 percent more than their calculation suggests. If your math says you need 2 yards, ordering 2.5 yards gives you a buffer so that after settling, you still have good coverage. This is especially important if you are mulching a large area all at once—you want consistent depth across the whole space.
Comparing mulch types and their weight
All mulch occupies the same volume—one yard is still 27 cubic feet whether it is shredded hardwood, pine bark, or cedar. What changes is the weight. Hardwood mulch weighs roughly 400 to 600 pounds per cubic yard when dry, and more when wet. Pine bark is lighter, around 300 to 400 pounds per yard. Cedar and cypress are also lighter.
Weight matters if you are calculating delivery costs or moving mulch by hand. A full cubic yard of wet hardwood mulch can weigh 800 pounds or more, which is why most people have it delivered rather than loading it into a truck themselves. Lighter mulches like pine or cedar are easier to handle if you are spreading smaller amounts.
Ordering mulch from a landscape supplier versus a garden center
Landscape suppliers and bulk material yards sell mulch by the yard and usually have a minimum order—often 1 to 3 yards depending on the company. They deliver with a dump truck, which means the mulch arrives in a large pile in your driveway or yard. You then spread it yourself or hire someone to do it.
Garden centers sell bagged mulch with no minimum, but at a higher per-cubic-foot price. Some garden centers also offer bulk mulch if you order ahead, though delivery may take longer. Call ahead to ask about bulk pricing and whether they deliver, because policies vary widely by location.
For a project under 1 yard, bags are usually more practical. For anything 2 yards or larger, bulk delivery is almost always cheaper per cubic foot, even with a delivery fee of $50 to $100.
Common mistakes when ordering mulch
The most common mistake is underestimating how much area one yard covers. A single yard spread 3 inches deep covers only about 108 square feet—roughly a 10-by-11-foot bed. Many people expect it to cover more and end up ordering again a few days later.
Another mistake is forgetting to account for settling. Ordering exactly what your calculation says leaves you thin on coverage by mid-season. A third mistake is ordering the wrong type for the job—using fine mulch (which compacts quickly) in a high-traffic area, or using heavy hardwood mulch in a container garden where you will need to refresh it often.
Finally, some people order mulch in spring and expect it to last the whole year. Mulch breaks down and thins over time, especially in warm, wet climates. Most gardeners refresh mulch once a year, usually in spring, adding 1 to 2 inches to bring it back to the original depth.
Frequently Asked Questions
How much does a cubic yard of mulch weigh?
Hardwood mulch weighs 400 to 600 pounds per cubic yard when dry, and 600 to 800 pounds when wet. Pine bark and cedar are lighter, around 300 to 400 pounds per yard. Weight depends on the mulch type, moisture content, and how tightly it is packed.
Can I use the 27 cubic feet measurement for other materials like soil or gravel?
Yes. One cubic yard always equals 27 cubic feet, regardless of the material. Soil, gravel, compost, and sand all use the same cubic yard measurement. However, the weight per yard varies—soil is heavier than mulch, and gravel is heavier still.
How do I know if a supplier is giving me a full yard?
A full cubic yard in a dump truck should form a pile roughly 3 feet high, 3 feet wide, and 3 feet deep. If the pile looks noticeably smaller or flatter, ask the driver to confirm the amount. Reputable suppliers measure by weight or volume, so you can request a ticket showing what you received.
Should I spread mulch right away or let it sit after delivery?
Spread it as soon as you can. Fresh mulch is easier to work with and spreads more evenly. If you must wait, keep it in a pile and cover it loosely with a tarp to prevent it from drying out completely, which makes it harder to spread and can cause it to repel water initially.
What if I order too much mulch?
Extra mulch can be stored in a dry spot for next season, though it will continue to break down and settle. You can also spread it thicker than planned, use it in other beds, or offer it to a neighbor. Some suppliers will take back unopened bulk orders, but policies vary—ask before you order.