80 lb Bag Concrete Calculator
Calculate how many 80 lb bags of concrete you need for your project. Determine concrete volume, total bags required, and total cost for slabs, footings, and more.
Step 1: Project Dimensions
Understanding Concrete Coverage
One 80 lb bag of concrete typically covers approximately 0.6 cubic feet. For a 4-inch thick slab, one bag covers about 1.8 square feet.
Step 2: Bag Details & Cost
About 80 lb Concrete Bags
80 lb bags are the most common size for concrete mix. Each bag produces approximately 0.6 cubic feet of cured concrete. Always round up to the nearest whole bag when purchasing.
Concrete Calculation Results
Total Bags Required for Your Project
Concrete Bag Size Comparison
| Bag Size | Yield per Bag | Bags Required | Total Cost | Cost per Cubic Ft |
|---|
Cost Breakdown by Bag Quantity
Concrete Calculation Formula
Bags Needed = (Length × Width × Depth) ÷ Bag Yield × Waste Factor
Calculate the volume in cubic feet, divide by the yield per bag (0.6 cubic feet for 80 lb bags), then multiply by the waste factor. Always round up to the nearest whole bag.
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