Bag weight and finished concrete volume are different measurements. ConcreteQty converts your project to cubic feet, adds the selected waste allowance, divides by published yield, and rounds up to a whole bag.
| Bag | Published yield | Bags per 1 ft³ |
|---|---|---|
| 40 lb | 0.30 ft³ | 4 |
| 50 lb | 0.375 ft³ | 3 |
| 60 lb | 0.45 ft³ | 3 |
| 80 lb | 0.60 ft³ | 2 |
“Bags per cubic foot” is rounded upward in the table. For purchasing, use the calculator’s exact total instead of multiplying the rounded illustration.
Check the product you are buying
The cited values come from QUIKRETE Concrete Mix No. 1101. Other mixes and brands can publish different yields, so the label on the actual product takes priority.
Use the concrete planner to calculate your project and review the cited sources.