Concrete buying guide
Ready-Mix vs. Concrete Bags
Last reviewed September 4, 2026
Bags give you control over small batches. Ready-mix becomes more practical when a continuous pour would require dozens of bags. There is no universal price crossover: compare the complete delivered ready-mix bill with bag price, delivery, mixer rental, labor, placement, and leftover material.
Use the related calculator →Reference table
Nominal bags per concrete volume
Before allowance; package data overrides nominal yields.
| Concrete volume | 40 lb bags | 60 lb bags | 80 lb bags |
|---|---|---|---|
| 0.25 yd³ | 23 | 15 | 12 |
| 0.50 yd³ | 45 | 30 | 23 |
| 0.75 yd³ | 68 | 45 | 34 |
| 1.00 yd³ | 90 | 60 | 45 |
01
Compare the complete delivered cost
Material price alone misses the fees that often decide a small project. Build both totals from current local quotes, keep every fixed charge visible, and use the same adjusted volume on both sides.
02
Mixing and placement workload
A bag count is also a handling plan. Every package must be moved, opened, mixed with a consistent water ratio, transported to the forms, placed, and consolidated while earlier batches are changing. Ready-mix moves the bottleneck from mixing to access and coordinated placement.
- Estimate individual mixer batches, not just bag count.
- Confirm the crew can maintain a continuous placement where the project requires it.
- Price wheelbarrows, buggies, a pump, washout, and cleanup when applicable.
03
When each option fits
Bags are often practical for repairs, isolated holes, and work where the pace must stay flexible. Delivered concrete is often operationally simpler for a larger continuous slab, footing, or set of forms. Access, supplier minimums, unloading time, and crew capacity can reverse either conclusion.
- Favor bags when staging is easy and volume is genuinely small.
- Favor ready-mix when bag and batch counts create a placement risk.
- Get the supplier’s complete delivered quote before choosing.
Limits
What this comparison does not decide
- Nominal yields vary by product; use the exact package data sheet.
- Ready-mix minimums, unloading allowances, delivery radius, and order increments are supplier-specific.
- This comparison does not choose a mix specification, reinforcement, or structural design.
Common questions
Ready-Mix vs. Concrete Bags FAQ
How many 80 lb bags make one cubic yard?
About 45 using a nominal 0.60 ft³ yield, before any allowance.
Is ready-mix always cheaper than bags?
No. Short-load, delivery, and placement fees can dominate a small order, while labor and equipment can dominate a large bagged pour.
How much extra concrete should I order?
Use an editable allowance based on measurement uncertainty, forms or excavation, and supplier guidance rather than a universal percentage.
Does a truck quote include pumping?
Do not assume it does. Ask for delivery, unloading time, pump or buggy access, standby, washout, tax, and other fixed fees as separate lines.