01
Nominal yield for common bag sizes
These are planning defaults for one currently documented product family—not guaranteed output for every mix carrying the same bag weight.
| Bag size | Cubic feet | Cubic metres |
|---|---|---|
| 50 lb | 0.38 ft³ | 0.011 m³ |
| 60 lb | 0.45 ft³ | 0.013 m³ |
| 80 lb | 0.60 ft³ | 0.017 m³ |
02
What “yield” means
Bag yield is the approximate volume of mixed concrete produced from one bag when it is prepared according to that product’s instructions. It is a volume—not a fixed square-foot coverage number.
Coverage changes with project thickness. Product formulation, water, mixing, placement, consolidation, and jobsite loss can also change practical output. That is why the product label or current data sheet takes priority over a general reference table.
03
A 10 × 6 ft slab, 4 inches thick
The existing Concrete calculation core gives this example an exact volume of 20 ft³ and 22 ft³ after a 10% planning allowance. Final purchasing rounds up to whole bags:
- 50 lb: 58 bags at 0.38 ft³ each
- 60 lb: 49 bags at 0.45 ft³ each
- 80 lb: 37 bags at 0.60 ft³ each
The allowance is a planning choice, not a yield guarantee. Confirm whether a supplier recommends a different allowance for the actual pour and product.
04
Check the exact product label
- Bag weight and product name: two mixes with the same weight can list different yields.
- Yield per bag: use the printed ft³ or m³ value when it differs from this guide.
- Mixing instructions: follow the manufacturer’s water and preparation directions.
- Application limits: confirm the product is intended for the project type and placement depth.
- Whole-bag purchase: calculate with the verified yield, then round the final package count up.
05
Sources and limitations
Planning defaults for 50, 60, and 80 lb bags. Yield varies by product and mixing conditions, so the exact product label or data sheet takes priority.
- Sakrete 5000 Plus product details — source for the displayed 50, 60, and 80 lb nominal yields.
- NIST volume conversion factors — reference for cubic-foot and cubic-metre conversion.
This guide estimates material volume only. It does not select slab thickness, reinforcement, mix strength, soil preparation, drainage, or structural suitability.
Last reviewed: August 28, 2026
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