80 lb Bag of Concrete is How Many Cubic Feet?
Quick Answer
An 80 lb bag of concrete yields approximately 0.6 cubic feet when mixed. This means you need about 1.67 bags per cubic foot, or 45 bags per cubic yard.
Concrete Bag Volume Reference
| Bag Size | Cubic Feet | Bags per Cubic Yard | Best For |
|---|---|---|---|
| 40 lb | 0.3 ft³ | 90 bags | Small repairs, anchors |
| 60 lb | 0.45 ft³ | 60 bags | Medium projects, posts |
| 80 lb | 0.6 ft³ | 45 bags | Most projects, slabs |
Bag Calculator - Convert Volume to Bags
How to use: Enter your project volume to see how many bags you need in different sizes. The 80lb bag is the most commonly used size for DIY and professional projects.
Frequently Asked Questions
How many cubic feet in an 80 lb bag of concrete?
An 80 lb bag of concrete yields approximately 0.6 cubic feet when mixed. This is based on standard concrete mix ratios and includes the water added during mixing.
How many 80lb bags of concrete make a yard?
You need approximately 45 bags of 80lb concrete to make one cubic yard (27 cubic feet). At 0.6 cubic feet per bag: 27 ÷ 0.6 = 45 bags.
Should I buy 60lb or 80lb bags?
80lb bags are more cost-effective for large projects and require fewer trips. 60lb bags are easier to lift and handle, making them better for small repairs or if you have physical limitations. 60lb bags cost slightly more per cubic foot.