ASTM C138/C138M, the standard test method for density, yield, and air content of concrete, defines yield as the volume of concrete produced from a mixture of known quantities of component materials. Bagged-concrete manufacturers apply this same underlying concept when publishing a bag’s yield on its label.

Dry Bag Weight vs Mixed Concrete Volume

An 80-lb bag describes the mass of the dry packaged material, not the volume of finished concrete. Once water is added and the mix is combined, that same bag produces approximately 0.60 ft³ of mixed concrete for a standard product. Weight and volume are two different measurements and are not interchangeable.

Why Yield Is Given in Cubic Units

Yield describes a three-dimensional volume, so it is reported in cubic feet, cubic yards, liters, or cubic meters, never in square feet. Coverage, not yield, depends on area.

For conventional normal-weight mixes, larger bags typically produce proportionally more concrete. But formulation choices, including aggregate type and density, cementitious content, lightweight aggregate, and specialty admixtures, can change yield substantially. Sakrete MAXIMIZER’s 80-lb bag yields approximately 0.92 ft³, well above the 0.60 ft³ typical of a standard 80-lb mix, because it uses structural lightweight aggregate rather than conventional aggregate. For the full range of package sizes each brand offers, see the Concrete Bag Size Chart.

Standard QUIKRETE Concrete Mix and Sakrete High-Strength Concrete Mix both currently publish approximately 0.30 ft³ for a 40-lb bag, about 8.5 liters or 0.0111 yd³. High-yield lightweight products, such as Sakrete MAXIMIZER, publish approximately 0.46 ft³ for the same 40-lb weight. Theoretically, about 90 standard 40-lb bags are needed for one cubic yard.

QUIKRETE Concrete Mix publishes approximately 0.375 ft³ for a 50-lb bag, about 10.6 liters. Sakrete 5000 Plus High Early Strength Concrete Mix currently publishes approximately 0.38 ft³ for its 50-lb bag, a very close but not identical figure. Always confirm the published yield for the specific product rather than assuming it is identical across brands.

A 60-lb bag of standard concrete mix yields approximately 0.45 ft³, about 12.7 liters, shared by QUIKRETE Concrete Mix, Sakrete High-Strength Concrete Mix, and Sakrete 5000 Plus. That works out to about 60 bags per cubic yard for a standard 60-lb mix.

Standard conventional concrete mix yields approximately 0.60 ft³, about 17 liters, from an 80-lb bag, per current QUIKRETE and Sakrete High-Strength technical data. Sakrete’s lightweight MAXIMIZER mix yields approximately 0.92 ft³ from the same 80-lb weight. Never calculate yield from bag weight alone when the exact product’s published yield is available.

QUIKRETE Concrete Mix lists a 90-lb bag at approximately 0.675 ft³, about 19.1 liters, noting regional availability on its data sheet. Because 90-lb bag availability and yield vary by brand and region, confirm the exact product’s current data sheet before ordering at this size rather than assuming a universal figure.

QUIKRETE Concrete Mix

Current published approximate yields: 40 lb, 0.30 ft³; 50 lb, 0.375 ft³; 60 lb, 0.45 ft³; 80 lb, 0.60 ft³; 90 lb, 0.675 ft³.

Sakrete High-Strength Concrete Mix

Current published approximate yields: 40 lb, 0.30 ft³; 60 lb, 0.45 ft³; 80 lb, 0.60 ft³. This confirms the same general yield pattern as QUIKRETE Concrete Mix without turning this page into branded product content.

Sakrete MAXIMIZER is formulated with structural lightweight aggregate and cement. Its current technical data sheet publishes approximately 0.46 ft³ for a 40-lb bag and approximately 0.92 ft³ for an 80-lb bag. Lower-density lightweight formulations can produce meaningfully more volume from the same dry bag weight, because the aggregate itself weighs less per unit volume than conventional normal-weight aggregate. This is a product-specific outcome; do not apply MAXIMIZER’s exact figures to other lightweight mixes without checking their individual data sheets.

Fast setting time does not automatically mean higher or lower yield. QUIKRETE Fast-Setting Concrete Mix’s current data sheet publishes approximately 0.375 ft³ for a 50-lb bag, with the data sheet also covering 60-lb and metric package sizes. Setting speed and yield are separate specifications on the label.

Higher compressive strength does not automatically mean more yield. Sakrete 5000 Plus High Early Strength Concrete Mix currently publishes approximately 0.38 ft³ for a 50-lb bag, 0.45 ft³ for a 60-lb bag, and 0.60 ft³ for an 80-lb bag, essentially matching standard mix yield at the same weights while offering greater compressive strength. Check strength rating and yield as two independent specifications.

Sakrete Sand Mix Topping & Bedding currently publishes approximately 0.30 ft³ for 40 lb, 0.45 ft³ for 60 lb, and 0.60 ft³ for 80 lb, yield figures that look similar to standard concrete mix. However, sand mix is intended for thin applications of about ½ inch to 2 inches and contains no coarse aggregate, making it a different product class from structural concrete mix. Do not assume concrete mix, sand or topping mix, mortar, grout, and repair material all produce comparable structural material just because their bag yields look similar.

The clearest illustration remains the flagship comparison: a standard 80-lb mix at approximately 0.60 ft³ versus Sakrete MAXIMIZER’s lightweight 80-lb mix at approximately 0.92 ft³, a difference driven by aggregate density rather than package weight.

Bagged concrete can only be purchased in whole-bag units. A calculation that returns 11.1 bags means you buy 12 bags, before any separate waste allowance is added.

Use the concrete slab calculator, concrete footing calculator, or post hole concrete calculator and fence post concrete calculator to get project volume, then apply the bag-yield formulas above.

Sakrete’s MAXIMIZER technical data sheet provides a specific starting water range and explicitly warns against overwatering. Excess water is not a legitimate estimating method for increasing yield; it changes concrete consistency and can reduce strength and durability. Use the stated yield and the recommended mixing water range on the current data sheet. For more on how water content affects strength, see the Water-Cement Ratio Chart.

A published yield of 0.60 ft³ per bag does not become 0.54 ft³ simply because you plan for waste. Instead, calculate theoretical bags using the published yield, then apply a separate project allowance. Sakrete’s bagged-concrete estimating guidance suggests adding approximately 10% for waste as an example recommendation, while QUIKRETE’s calculator documentation simply notes that its figures do not include waste or uneven subgrade allowances. Treat any specific percentage as a manufacturer example, not a universal rule, since actual waste depends on site conditions, crew experience, and project complexity.

Converting bag quantities to yard equivalents, using the tables above, helps you see project scale in both formats. Whether bagged or ready-mix is more economical depends on bag prices, ready-mix short-load charges, delivery distance, and labor, all of which vary by market. See ready-mix vs bagged concrete and how many yards of concrete do I need for a fuller comparison.

For thickness selection guidance, see the Concrete Slab Thickness Chart.