Ready-mix vs bagged concrete cost
Compare ready-mix and bagged concrete cost from concrete volume, cubic yards, bag count, delivery fees, forms, base prep, and mixing time.
Reviewed - May 21, 2026Short answer
Bagged concrete is often cheaper for post holes, small footings, repairs, and very small pads because it avoids delivery and short-load fees.
Ready-mix becomes competitive as volume rises. For a 10 ft by 10 ft slab at 4 in thick with 10% waste, the calculator estimates 1.4 cu yd or 62 standard 80 lb bags. Current default assumptions put ready-mix material total at $357-$809 and bagged material total at $385-$833 before site-specific adjustments.
Run the same dimensions both ways before choosing. A six-hole post project with 12 in by 30 in holes and 10% waste generates $110-$198 in bagged concrete versus $165-$368 for ready-mix under the current default, while slab examples can narrow or reverse that gap once bag count and placement time climb.
Ready-mix vs bagged concrete cost method
- Calculate the concrete volume in cubic feet, then add waste for forms, over-excavation, spillage, and ordering margin.
- For ready-mix, divide waste-adjusted cubic feet by 27, round the order volume up to the nearest tenth of a cubic yard, multiply by ready-mix price per cubic yard, then add delivery fees.
- For bagged concrete, divide waste-adjusted cubic feet by the selected bag yield, round up to whole bags, then multiply by the bag price.
- Run the same dimensions with delivery type set to bags and ready-mix; keep project shape, thickness, waste, and bag size consistent so the comparison is real.
- Add forms and base prep allowances for slabs or footings so the comparison is not just concrete price.
- Compare the result with mixer rental, haul distance, helper labor, placement speed, finish risk, delivery minimums, and short-load fees.
Quick examples
These generated examples use the current U.S. default concrete assumptions: 27 cu ft per cubic yard, 0.60 cu ft per 80 lb bag, 10% waste, ready-mix delivery, bag pricing, and slab forms/base allowances where relevant.
Worked example
10 ft by 10 ft slab at 4 in thick.
Starter shopping list
- Ready-mix concrete 1.4 cu yd
- Forms, stakes, gravel base, reinforcement Project allowance
- Finishing tools and curing supplies As needed
This example is generated from the same calculator logic used on the Concrete slab calculator page.
Project size
- Use bags for small post holes, mailbox footings, fence repairs, small pads, and places where delivery access is poor.
- Compare ready-mix once the bag count reaches dozens of bags or when the pour needs to be placed and finished quickly.
Break-even check
- Small holes can still favor bags because there is no truck minimum; slabs can move toward ready-mix when the estimate reaches 40 or more bags and timing starts to matter.
- Use the generated material totals as the first comparison, then price mixer rental, pickup trips, water staging, helper time, short-load charges, pump needs, and leftover disposal separately.
Delivery and minimums
- Ready-mix pricing often depends on delivery fees, short-load minimums, access, timing, waiting time, and local supplier policies.
- Bagged concrete avoids truck delivery, but you still need to count pickup, handling, water access, staging, and leftover bags.
Labor and finish risk
- Hand-mixing many bags can slow the pour enough to hurt finish quality, especially on slabs and continuous footings.
- Ready-mix can reduce mixing labor and improve placement consistency, but it requires forms, helpers, access, and finishing tools to be ready before the truck arrives.
Common mistakes
- Comparing only bag price with ready-mix per-yard price.
- Forgetting delivery fees, short-load fees, mixer rental, hauling, and helper time.
- Skipping waste before calculating cubic yards or bag count.
- Changing thickness, waste, bag size, or project shape between the bagged and ready-mix runs, which hides the true cost difference.
- Choosing bags for a slab that needs fast, consistent placement.
- Ordering ready-mix for a tiny repair without checking minimum charges and leftover disposal.
FAQ
Is ready-mix cheaper than bagged concrete?
It depends on volume, delivery fees, bag size, labor, and tools. Bags can be cheaper for small holes and repairs, while ready-mix often becomes competitive for slabs or projects with dozens of bags.
When should I use bagged concrete?
Use bagged concrete for small post holes, small footings, patches, repairs, and projects where truck delivery is impractical or minimum charges dominate the ready-mix quote.
Is bagged concrete better for post holes?
Often, yes. For six 12 in diameter by 30 in deep post holes with 10% waste, the generated example estimates $110-$198 for 80 lb bags versus $165-$368 for ready-mix before labor, access, and tool adjustments.
When should I use ready-mix concrete?
Use ready-mix for larger slabs, continuous footings, and pours where placement speed, consistent mixing, and finish quality matter more than avoiding a delivery fee.
How do I compare ready-mix and bagged concrete?
Calculate waste-adjusted volume first. Price ready-mix from cubic yards plus delivery, price bags from whole bag count, then add forms, base prep, tools, labor time, and site access constraints.
Does the bagged concrete estimate include mixer rental?
The generated material total includes concrete and slab or footing forms/base allowances where relevant. Add mixer rental, hauling, water setup, finishing tools, and labor time separately.
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