Concrete bag estimator
Rectangular slab. Length and width in feet, thickness in inches, then premix bags. Yields from the official Quikrete and Sakrete pages below. Estimate, not a quote.
Sources
Bag yields on this page come only from these official links. Last opened 2026-08-24.
| Product | What we use | Official page |
|---|---|---|
| Quikrete 1101 Concrete Mix PDS | 40 lb ≈ 0.30 ft³, 60 lb ≈ 0.45, 80 lb ≈ 0.60 | Quikrete 1101 PDS (PDF) |
| Sakrete High-Strength Concrete Mix | Same yields: 40 lb ≈ 0.30 ft³, 60 lb ≈ 0.45, 80 lb ≈ 0.60 | sakrete.com High-Strength mix |
| Sakrete High-Strength TDS | Same yields as the product page | Sakrete High-Strength TDS (PDF) |
Bag yields we use
- 0.60 cubic feet per 80 lb bag
- 0.45 cubic feet per 60 lb bag
- 0.30 cubic feet per 40 lb bag
Those figures are the published Quikrete 1101 and Sakrete High-Strength yields in the sources table. Always read the bag you are buying; mix, moisture, and waste change the count. Volume = length × width × (thickness in inches ÷ 12).
Rounded up. This is an estimate, not a contractor quote, structural design, or a mix spec.