How Many 80lb Bags of Concrete in a Yard?
Understand 80lb concrete bag yield before choosing bags or ready-mix.
Last reviewed: June 2026
Short Answer
One cubic yard is 27 cubic feet. If an 80lb concrete bag yields about 0.60 cubic feet, it takes about 45 bags to make one cubic yard. Always check the yield printed on your bag.
Use the concrete bag calculatorPractical Explanation
Bag yield varies by mix and manufacturer. The common planning assumption for an 80lb bag is about 0.60 cubic feet after mixing.
Forty-five 80lb bags is heavy and labor-intensive. For bigger pours, homeowners and crews should compare bag mixing against ready-mix delivery logistics.
Simple Formula
Bags per yard = 27 cubic feet / bag yield. With 0.60 cubic feet per 80lb bag: 27 / 0.60 = 45 bags.
Example: 1.5 cubic yards using 80lb bags
- Convert yards to cubic feet: 1.5 x 27 = 40.5 cubic feet
- Divide by 80lb bag yield: 40.5 / 0.60 = 67.5 bags
- Round up because partial bags are not practical: 68 bags
A 1.5 yard pour would take about 68 80lb bags, assuming 0.60 cubic feet per bag.
Common Mistakes
- Using bag weight as if it were volume.
- Forgetting to round up to whole bags.
- Underestimating the weight and mixing time for dozens of bags.
FAQ
Is 45 bags always exactly one yard?
It is a common estimate based on 0.60 cubic feet per bag. Check the yield printed on your specific bag.
Is a yard of concrete too much to mix by hand?
For many DIYers, yes. One yard is a lot of mixing, lifting, and timing. Ready-mix may be more practical.
Estimate Disclaimer
These guides and calculators provide planning estimates. Bag yields, material density, compaction, waste, site conditions, supplier measurements, and local requirements can vary. Confirm quantities with your supplier, contractor, plans, or local code requirements when needed.
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