YardBatch field guide
Compare bag sizes by the price per cubic foot
A cheaper bag is not always a cheaper way to fill the same space.
YardBatch · Published September 25, 2026
Two bags can sit next to each other on the shelf, look similar, and hold different volumes. To compare them fairly, start with the cubic feet printed on each label. The price per bag tells you what you pay at checkout; the price per cubic foot tells you what you pay for the amount of material.
Put both options on the same basis
Divide price by volume. A hypothetical $3 bag containing 1.5 cubic feet costs $2 per cubic foot. A $3.60 bag containing 2 cubic feet costs $1.80 per cubic foot. The larger bag is cheaper per unit of volume even though it has the higher sticker price.
| Option | Bag price | Price / cu ft |
|---|---|---|
| 1.5 cu ft bag | $3.00 | $2.00 |
| 2 cu ft bag | $3.60 | $1.80 |
Then price your actual project
Unit pricing is only the first comparison because you buy whole bags. For a 24-cubic-foot project, the smaller option requires 16 bags and costs $48. The larger option requires 12 bags and costs $43.20. In this case the lower unit price also produces the lower purchase total.
For a very small job needing 1.2 cubic feet, one bag of either size is enough. The $3 bag produces the lower checkout total even though its unit price is higher. Unused material has value only if you can use or store it.
Read the quantity, not the picture
Do not assume all mulch bags contain 2 cubic feet. Product size can vary. Soil and gravel may also be labelled by weight; pounds alone cannot establish volume without a material-specific conversion. Compare products intended for the same use and check whether an advertised coverage figure assumes a particular depth.
Use the calculator twice
- Enter your measurements once.
- Enter the first product’s bag volume and price, then note the bag count and total.
- Replace those two fields with the second product’s information.
- Compare the purchase totals as well as how much extra material each leaves.
Keep taxes and travel costs separate. If one store requires a longer trip, include that in your final decision.
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