Measure and MendStart measuring

How many concrete bags fit the measured volume?

Enter a slab, footing, or hole dimension already established for the job. The calculator converts volume to a whole-bag count using the selected label yield.

A 10 × 10 ft placement at 4 in thick is 33.33 ft³. At the cited 0.60 ft³ yield, that is 56 whole 80 lb bags.

Bagged concrete calculator

Calculate a rectangular placement or repeated cylindrical holes using the selected named-product bag yield.

56 bags

33.33 ft³ (0.944 m³) divided by 0.60 ft³ per bag.

Approximate yield for QUIKRETE Concrete Mix No. 1101 — 80 lb. Bag count is rounded up.

See the formula and scope

Rectangular volume is length × width × thickness. Cylindrical volume is π × radius² × depth. The result is material quantity only—not structural design, reinforcement, subbase, curing, permit, or delivery advice.

A quantity calculator is not a design calculator

The tool does not decide slab thickness, footing diameter, depth, reinforcement, subbase, drainage, frost protection, or permitted use. Enter dimensions from the plan, building authority, or qualified professional that applies to the project.

Why whole bags round up

The unrounded volume is divided by the approximate bag yield, then rounded up because a fraction of a bag cannot supply the required calculated volume. No contingency is added unless you enter one.

When bagged mix may not be practical

A high bag count is a planning signal to compare ready-mix delivery, access, mixing capacity, batch consistency, weather, placement time, and finishing needs. It is not a supplier recommendation.

Sources and scope

Source links reviewed July 16, 2026. A review date is not the document's publication date.

  1. QUIKRETE: Concrete Mix No. 1101 Technical Data SheetNorth America · manufacturer data sheet

    Bag counts are based on stated approximate yield and must be rounded up to whole bags.

  2. National Institute of Standards and Technology: NIST Guide to the SI, Appendix B — Conversion FactorsUnited States · government standard

    Code retains exact defining constants where NIST identifies an exact relationship.