Bag count calculator
Converts a volume into a bag count. Bag yields below come from Quikrete and Sakrete technical data sheets; formulations vary, so check the bag you are actually buying. Past roughly 40 bags, ready-mix delivery is usually cheaper and always easier.
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This calculator needs JavaScript. The reference table below covers the common cases.
| Bag size | Yield | Bags per yd³ |
|---|---|---|
| 80 lb | 0.60 ft³ | 45 |
| 60 lb | 0.45 ft³ | 60 |
| 50 lb | 0.375 ft³ | 72 |
| 40 lb | 0.30 ft³ | 90 |
The formula
volume (ft³) × (1 + waste) ÷ bag yield (ft³) = bags, rounded up
Worked example
12 ft³ with 10% waste = 13.2 ft³. At 0.60 ft³ per 80 lb bag: 13.2 ÷ 0.60 = 22 bags.
Reference table
| Bag size | Yield | Bags per yd³ |
|---|---|---|
| 80 lb | 0.60 ft³ | 45 |
| 60 lb | 0.45 ft³ | 60 |
| 50 lb | 0.375 ft³ | 72 |
| 40 lb | 0.30 ft³ | 90 |
Assumptions
- Yields are manufacturer TDS figures: 80 lb ≈ 0.60 ft³, 60 lb ≈ 0.45 ft³, 50 lb ≈ 0.375 ft³, 40 lb ≈ 0.30 ft³.
- Formulations differ between products and brands — verify against the bag.
- A pallet is typically 42 bags, but pallet counts are set by the retailer.