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).
Assumptions to Check
Before ordering materials, confirm the dimensions, product coverage, waste factor, and local installation requirements for your project. Manufacturer coverage tables and local code rules can change the final quantity, especially for structural work, exterior projects, and irregular layouts.
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