Quick conversions for one cubic yard
- 1 ft³ bags: 27 bags
- 1.5 ft³ bags: 18 bags
- 2 ft³ bags: 13.5 bags by volume, so buy 14 whole bags
- 3 ft³ bags: 9 bags
How much area does one bag of mulch cover?
A 2 ft³ bag covers 12 ft² at 2 in deep or 8 ft² at 3 in deep. A 3 ft³ bag covers 18 ft² at 2 in or 12 ft² at 3 in. Depth changes coverage even when the bag size stays the same.
| Added depth | One 2 ft³ bag | One 3 ft³ bag |
|---|---|---|
| 1 in | 24 ft² | 36 ft² |
| 2 in | 12 ft² | 18 ft² |
| 3 in | 8 ft² | 12 ft² |
| 4 in | 6 ft² | 9 ft² |
Coverage (ft²) = bag volume (ft³) × 12 ÷ added depth (in). These are volume calculations, not recommended depths or guaranteed coverage. For a top-up, use only the depth you will add; uneven ground and actual bag yield may change the amount.
For example, a 100 ft² bed at 3 in needs 25 ft³: 13 whole 2 ft³ bags with no allowance. If you choose 10% extra, 27.5 ft³ requires 14 bags. Use the mulch bag calculator for your area, added depth, and allowance.
Use your project volume, not only one yard
The conversion above answers how many bags contain the same nominal volume as one cubic yard. Your project may need more or less. Calculate the cubic feet required for your actual area and depth, include any allowance you choose, divide by the bag size, and round up once at the end.
Whole bags = round up (project cubic feet ÷ cubic feet per bag)
Example: a project that needs 1.06 cubic yards
Multiply 1.06 by 27 to get about 28.62 ft³. With 2 ft³ bags, 28.62 ÷ 2 = 14.31, so the purchase quantity is 15 bags. Rounding one cubic yard to 14 bags and then scaling that rounded number would give a less accurate answer.
Check the package before buying
Bag sizes vary by product and store. Use the volume on the actual label rather than assuming every bag contains 2 ft³. A coverage claim on a label may also assume a specific depth, so compare volumes on the same basis.
The mulch calculator accepts the bag size from your product label and rounds the final project quantity to whole bags. If you are comparing delivery, see the bags versus bulk guide.