How many 80lb bags of concrete in a yard?
Quick Answer
One cubic yard of concrete requires 45 bags of 80-pound concrete mix. Each 80-lb bag yields 0.60 cubic feet of mixed concrete, and one cubic yard = 27 cubic feet. So 27 ÷ 0.60 = 45 bags. For 60-lb bags (0.45 cu ft each): 60 bags per yard. For 40-lb bags (0.30 cu ft): 90 bags per yard.
Quick Reference Table
| Bag Size | Bags per cubic yard |
|---|---|
| 80 lb bag | 45 bags / yd³ |
| 60 lb bag | 60 bags / yd³ |
| 50 lb bag | 72 bags / yd³ |
| 40 lb bag | 90 bags / yd³ |
How to Calculate It Yourself
- 1
One cubic yard = 27 cubic feet.
- 2
Find your bag's yield: 80-lb bag = 0.60 cu ft, 60-lb = 0.45 cu ft, 40-lb = 0.30 cu ft (printed on bag label).
- 3
Divide 27 by yield per bag: 27 ÷ 0.60 = 45 bags of 80-lb mix per yard.
- 4
For your project: calculate cubic yards needed, multiply by bags per yard, add 10% waste.
Pro Tip
At $6–9 per 80-lb bag, one cubic yard in bags costs $270–405. Ready-mix runs $150–175/yard delivered — and saves hours of mixing. Bags only make sense for projects under 0.5 yards (about 22 bags).
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