The math: a cubic yard is 27 cubic feet, and an 80 lb bag yields about 0.60 cubic feet of mixed concrete (27 ÷ 0.60 = 45). Yields are printed on every bag and vary slightly by brand, so treat these as close estimates and round up.
At these quantities, compare prices with ready-mix delivery — a full yard mixed by hand is 45 bags of lifting, mixing and timing, and truck-mixed concrete is stronger and more consistent.
Bags per cubic yard / cubic meter
| Bag size | Yield per bag | Bags per yd³ / m³ |
|---|---|---|
| 80 lb | 0.60 ft³ | 45 / yd³ |
| 60 lb | 0.45 ft³ | 60 / yd³ |
| 40 lb | 0.30 ft³ | 90 / yd³ |
| 25 kg | 12.5 L | 80 / m³ |