Start with one comparable quantity
Calculate finished concrete volume and add a deliberate allowance before comparing options. In imperial units, divide cubic feet by 27 to get cubic yards. Then translate the same required volume into bag counts using the exact product yield.
That is 3,600 lb of dry product before water and before any allowance.
A truck quote may be stated per cubic yard but include a minimum order, short-load charge, fuel surcharge, environmental fee, waiting time, or delivery-zone fee. A bag estimate may omit pallet delivery, mixer rental, tools, helpers, cleanup, and the cost of slower placement. Ask for written totals that cover the same volume and site conditions.
Compare six costs—not two prices
| Cost | Bagged mix | Ready-mix |
|---|---|---|
| Material | Bags × current shelf price | Quoted yards × mix price |
| Delivery | Pallet or store delivery | Trip, fuel, short-load fees |
| Equipment | Mixer, tubs, wheelbarrows | Chute, buggy, pump, washout |
| Labor | Handling and repeated batches | Placement crew during truck window |
| Timing risk | Slow mixing and cold joints | Waiting or overtime charges |
| Waste | Unopened bags may be returnable | Unused delivered concrete needs a plan |
Minimums, service areas, truck size, weekend pricing, access requirements, and short-load policies vary by market and supplier.
Bagged mix is often practical when…
- The pour is small and comfortably within the crew’s mixing capacity.
- The site is difficult for a truck, buggy, or pump to reach.
- The work must happen in short, controlled phases and the design permits that sequence.
- You need a specialty repair or fast-setting product rather than a standard delivered mix.
- Delivery minimums and service fees dominate the local ready-mix quote.
Bags also let you buy exact packages and stage material, but storage must keep them dry. The lifting load grows quickly: fifty 80 lb bags weigh two tons before mixing.
Ready-mix deserves priority when…
- The bag count is high enough that mixing labor threatens placement quality or timing.
- The slab should be placed continuously and consistent batches matter.
- A truck chute can reach the forms or a buggy or pump is already planned.
- The crew is ready to place, screed, finish, joint, and cure the delivered volume on schedule.
- The all-in quote is competitive after bag delivery, rental, and labor are included.
Before booking, tell the supplier the intended application, required strength or specification, estimated volume, access, unloading method, distance from truck to forms, and timing. Do not add unapproved water on site to make placement easier; follow the mix design and supplier guidance.
A simple decision sequence
- Confirm the slab design, forms, compacted base, and finished dimensions.
- Calculate volume plus allowance.
- Price exact bags using published yield—not weight alone.
- Request an all-in ready-mix quote for the same order volume.
- Add equipment, delivery, labor, access, timing, and cleanup to both options.
- Choose the plan your crew can place and finish safely within the product’s working time.
Scope and source
The 0.60 ft³ figure is the published approximate yield for an 80 lb bag in the QUIKRETE Concrete Mix data sheet. Product yields and supplier charges vary. This guide frames a purchasing comparison; it does not specify concrete mix design, slab thickness, reinforcement, or structural adequacy.