How much mulch do I need?
The amount depends on the area being covered and the desired depth. Bulk mulch is commonly measured in cubic yards, while bagged mulch is labeled in cubic feet.
How to calculate mulch
For a rectangle, multiply length by width. For a circle, divide the diameter by two to find the radius, then calculate area as π × radius².
- Calculate the area in square feet.
- Divide depth in inches by 12 to convert it to feet.
- Multiply square feet by depth in feet to get cubic feet.
- Divide cubic feet by 27 to get cubic yards.
For a 10 × 10 foot bed at 3 inches deep: the area is 100 square feet, the depth is 0.25 feet, and the volume is 25 cubic feet, or about 0.93 cubic yards.
How many bags of mulch do I need?
Divide the total cubic feet by the bag size printed on the package. Always round up to buy full bags. For example, 25 cubic feet requires 13 bags when each bag holds 2 cubic feet.
How many cubic feet are in a cubic yard?
1 cubic yard = 27 cubic feet. This connects bulk quantities measured in cubic yards with bags measured in cubic feet.
What depth of mulch should I use?
Around 2–3 inches is commonly used for many landscape beds. The appropriate depth can vary based on the material, plants, existing mulch, and purpose.
Bagged mulch vs. bulk mulch
Bagged mulch can be convenient for smaller projects and easier to transport. Bulk mulch is commonly purchased by the cubic yard and may be more practical for larger landscaping projects. Prices and availability vary.
Mulch coverage table
| 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. |