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60lb vs 80lb Concrete Bags: Which Should You Buy?
By Team FreeConcreteCalc.com · · Updated · 3 min read
What’s the Difference Between 60lb and 80lb Concrete Bags?
Both 60lb and 80lb bags contain the same concrete mix (Portland cement, sand, and gravel) — just in different quantities. An 80lb bag yields 0.60 cubic feet; a 60lb bag yields 0.45 cubic feet. The cost per cubic foot is nearly identical, so the choice comes down to project size and physical ability.
Quick Comparison Table
| Feature | 60 lb Bag | 80 lb Bag |
|---|---|---|
| Yield per bag | 0.45 cu ft | 0.60 cu ft |
| Bags per cubic yard | 60 | 45 |
| Typical price (2026) | $5.50–$7.00 | $7.00–$9.00 |
| Cost per cu ft | ~$13.33 | ~$13.33 |
| Water needed | ~2.8 quarts | ~3.8 quarts |
| Best for | Small projects, solo work | Large projects, crew work |
Prices based on 2026 national averages at Home Depot and Lowe’s. Yields per Quikrete and Sakrete manufacturer specifications.
When to Choose 60lb Bags
- Small projects — fence posts, mailbox bases, small repairs (under 5 cu ft)
- Working alone — easier to lift, carry, and pour into a mixer
- Tight spaces — easier to maneuver into backyards or around obstacles
- Physical limitations — 20 fewer pounds per lift adds up over dozens of bags
- Post holes — you’re carrying bags to each hole, not dumping at one spot
When to Choose 80lb Bags
- Large projects — slabs, patios, driveways, garage floors
- Fewer trips — need 25% fewer total bags for the same volume
- Working with a helper — sharing the load makes 80lb manageable
- Cost efficiency — fewer bags means less time opening, mixing, and cleanup
- Bulk purchases — pallets of 80lb bags are the most common at hardware stores
How Many Bags for Common Projects?
| Project | Volume (with waste) | 60lb Bags | 80lb Bags |
|---|---|---|---|
| Single fence post | 1.3 cu ft | 3 | 2–3 |
| 5×5 AC pad (4”) | 9.2 cu ft | 21 | 16 |
| 10×10 slab (4”) | 36.7 cu ft | 82 | 62 |
| 12×12 slab (4”) | 52.8 cu ft | 118 | 89 |
| 20×20 slab (4”) | 146.7 cu ft | 326 | 245 |
For our 10×10 slab example, that’s 20 fewer bags to open, mix, and pour when using 80lb. On big projects, 80lb bags save hours of labor.
Our Recommendation
| Project Size | Recommendation |
|---|---|
| Under 5 cu ft | 60lb bags |
| 5–27 cu ft (under 1 cu yd) | 80lb bags |
| Over 27 cu ft (1+ cu yd) | Consider ready-mix truck delivery |
Related Guides
- How Many 80lb Bags Do You Actually Need? — calculation guide for 80lb bags
- Solving the 4-Inch Slab Bag Math — bag counts for standard slabs
- Best Concrete Calculator App (2026) — compare free calculator tools
Calculate Your Exact Bag Count
Use our concrete bag calculator to instantly see how many bags of each size you need for your specific project dimensions — with waste factor included.
Frequently Asked Questions
- How many 80lb bags of concrete are in a cubic yard?
- There are 45 bags of 80lb concrete in one cubic yard. One cubic yard equals 27 cubic feet, and each 80lb bag yields 0.60 cubic feet (27 ÷ 0.60 = 45).
- How many 60lb bags of concrete are in a cubic yard?
- There are 60 bags of 60lb concrete in one cubic yard. Each 60lb bag yields 0.45 cubic feet (27 ÷ 0.45 = 60).
- Is an 80lb bag of concrete cheaper per cubic foot than a 60lb bag?
- They're approximately the same cost per cubic foot — about $13.33. The 80lb bag is slightly more economical because you open, mix, and handle fewer bags for the same volume, saving time and effort.
- Can one person lift and mix 80lb bags of concrete?
- Yes, but it's physically demanding. If you're working alone, mixing more than 20–30 bags of 80lb in a day is exhausting. For solo projects, 60lb bags are easier on your body — especially for post holes where you carry bags to each hole location.