Free calculator
Concrete Bag Count
How many bags of concrete do you need? Estimates 80-, 60-, and 40-lb bags for a rectangular pour, with 10% waste.
Results
Enter your dimensions and hit Calculate.
Assumptions
- Yield per bag: 80 lb = 0.6 ft³, 60 lb = 0.45 ft³, 40 lb = 0.3 ft³.
- 10% waste factor applied to all counts.
- Bags are ceiling-rounded.