One yard of mulch equals 27 cubic feet

A cubic yard is a standard measurement for bulk mulch, and it always contains 27 cubic feet. This is true whether you're buying mulch, compost, gravel, or any other landscaping material sold by the yard. The math is straightforward: a yard is 3 feet long, 3 feet wide, and 3 feet deep, which multiplies to 27 cubic feet.

When you order mulch from a supplier, they measure it in cubic yards because that's how their trucks are sized and how pricing works. Understanding this conversion helps you figure out how much material you actually need for your garden beds, pathways, or landscaping project.

Key Takeaways

  • One cubic yard of mulch always equals 27 cubic feet, regardless of mulch type or supplier.
  • To find how many yards you need, measure your garden bed in feet, multiply length × width × depth, then divide by 27.
  • Mulch settles over time, so ordering 10 to 15 percent extra accounts for compaction in the first few weeks.
  • A cubic yard of mulch typically covers 100 to 160 square feet at a 2 to 3-inch depth, depending on mulch density.

How to calculate cubic feet for your garden beds

Start by measuring the length and width of your garden bed in feet. Then decide how deep you want the mulch layer—most landscapers recommend 2 to 3 inches for weed suppression and moisture retention. Convert that depth to feet by dividing by 12 (so 3 inches becomes 0.25 feet).

Multiply length × width × depth in feet. This gives you the total cubic feet you need. Then divide that number by 27 to find how many cubic yards to order. For example, a bed that is 10 feet long, 4 feet wide, and 3 inches deep would be: 10 × 4 × 0.25 = 10 cubic feet. Divided by 27, that's roughly 0.37 cubic yards, or about one-third of a yard.

If you have multiple beds, calculate each one separately and add the totals together. This prevents you from ordering too much or too little.

Why mulch settles and what that means for your order

Fresh mulch is fluffy and takes up more space than it will after a few weeks. As it settles, compacts, and begins to break down, the volume shrinks noticeably—sometimes by 10 to 15 percent in the first month alone. This is normal and happens faster in rainy climates or with finer mulch grades.

To account for settling, order about 10 to 15 percent more mulch than your calculation shows. If your beds need 2 cubic yards, order 2.3 yards instead. This ensures your beds stay at the depth you want after the initial compaction phase. You can always use leftover mulch in other areas or save it for next season.

Coverage area at different depths

The depth you choose affects how far one cubic yard stretches. At a standard 2-inch depth, one cubic yard covers roughly 160 square feet. At 3 inches deep, it covers about 110 square feet. At 4 inches, expect around 80 square feet of coverage.

These numbers assume typical mulch density. Heavier mulches like wood chips or bark nuggets may cover slightly less area, while lighter mulches like shredded hardwood may stretch a bit further. If you know your total square footage but not the depth, you can work backward: divide your square footage by the coverage rate for your chosen depth to find how many yards you need.

Common mistakes when ordering mulch by the yard

The biggest mistake is forgetting to account for settling. Homeowners often order exactly what their math shows and then wonder why their beds look thin after a few weeks. Order extra from the start.

Another common error is measuring depth in inches but forgetting to convert to feet before multiplying. Always convert inches to feet first (divide by 12) or your final number will be way off. Also, don't assume all mulch types cover the same area—dense bark nuggets and light shredded hardwood behave differently, so ask your supplier what coverage to expect for the specific product you're buying.

Finally, some people order by weight instead of volume. Mulch sold by weight varies depending on moisture content, so always ask the supplier to confirm the cubic yardage, not just the tonnage.

Ordering and delivery considerations

Most mulch suppliers have a minimum order, often one or two cubic yards. If your calculation shows you need less than the minimum, you have two choices: order the minimum and use the extra elsewhere, or buy bagged mulch from a garden center instead (though this costs more per cubic foot).

When you place an order, confirm whether the price includes delivery and whether the supplier will spread the mulch for you. Some charge extra for spreading; others include it. Also ask about the truck size—a standard landscape truck holds about 10 to 12 cubic yards, so if you need more than that, you'll need multiple deliveries or a larger truck.

Frequently Asked Questions

How many bags of mulch equal one cubic yard?

A standard 2-cubic-foot bag of mulch requires 13.5 bags to make one cubic yard (27 ÷ 2 = 13.5). Bags come in different sizes—some are 1.5 cubic feet or 3 cubic feet—so check the label. Buying bagged mulch costs significantly more per cubic foot than ordering by the yard, but it works well for small projects.

Does mulch type affect the cubic feet measurement?

No. One cubic yard is always 27 cubic feet by volume, whether it's shredded hardwood, pine bark, cedar, or wood chips. The type affects density, color, and how long it lasts, but not the volume measurement itself.

Should I order mulch in cubic yards or by weight?

Order by cubic yards. Weight varies based on moisture content and mulch type, making it an unreliable way to measure volume. A wet load of mulch weighs more than a dry one, even if both are the same cubic yardage. Always confirm the order in cubic yards.

What if my garden bed is an odd shape?

Break it into rectangles. If your bed is L-shaped, measure it as two separate rectangles, calculate cubic feet for each, add them together, then divide by 27. For circular beds, measure the radius, use the formula π × radius² to find square feet, then multiply by depth in feet and divide by 27.

Can I store leftover mulch?

Yes. Keep it in a dry location, covered loosely with a tarp to prevent it from getting waterlogged. Mulch stored this way stays usable for several months. In very hot, dry climates, it may dry out and become harder to spread, but it's still fine to use.