Bagged Concrete vs Ready-Mix: Which Is Cheaper?

For most homeowners, bagged concrete is cheaper for jobs under about 1 cubic yard, and ready-mix is cheaper and far easier above that. One cubic yard is 45 bags of 80 lb concrete, which is roughly a 10 x 8 ft slab at 4 inches thick. The exact break-even depends on your local bag price, the ready-mix price per yard and the fixed fees on a small delivery, and you can work it out in a few minutes.

Start by finding your volume with the Concrete Calculator. It shows cubic yards (how ready-mix is sold) and the number of 40, 60 or 80 lb bags (how bagged concrete is sold) side by side.

Why Small Jobs Favor Bags

The two options are priced in completely different ways:

On a tiny job, those fixed charges dominate and bags win easily. As the volume grows, the fixed charges are spread over more yards, the bag count climbs, and at some point the truck becomes cheaper. For many US suppliers that crossover lands somewhere around 1 cubic yard, but local pricing can move it in either direction, so get a quote.

Step 1: Price Bagged Concrete per Cubic Yard

Multiply your local shelf price by the number of bags in a yard. These counts use the same yields as the calculator: 0.30, 0.45 and 0.60 cu ft for 40, 60 and 80 lb bags.

For example, if 80 lb bags cost $5, $6, $7 or $8 each where you live, a yard of bagged concrete costs $225, $270, $315 or $360 in material. Bag prices vary widely by region, store and mix type, so use the price you actually see on the shelf. Check the 40 lb price too: small bags often cost more per cubic foot.

Step 2: Get a Ready-Mix Quote

Call one or two local ready-mix suppliers and ask for:

Short-load fees and delivery charges are the reason a 1 yard ready-mix order can cost much more per yard than a large one. They vary a lot between suppliers and regions, so compare at least two quotes.

Step 3: Find Your Break-Even Volume

Add up the ready-mix fixed fees (delivery, short-load and any minimum-order top-up). Then work out how much more a yard of bags costs than a yard of ready-mix. Divide the first by the second:

Break-even cubic yards = fixed ready-mix fees ÷ (bag cost per yard − ready-mix price per yard)

Below that volume, bags are cheaper on material. Above it, ready-mix is. The table shows how the break-even moves with different numbers. These are arithmetic examples, not price quotes:

If bags work out cheaper per yard than the ready-mix price itself, which is rare but possible with a sale, bags win on material at any size, and the decision comes down to labor.

The Costs That Don't Show Up on the Receipt

Material price is only part of the comparison. Bags carry costs of their own:

Ready-mix also has its own extras to plan for:

Middle Options Between Bags and a Full Truck

Quick Guide by Job Size

Post holes, fence footings, steps and small landings fall firmly in bag territory. For bag counts by project, see how many bags of concrete you need. A 12 x 12 ft patio at 4 inches is 1.78 cubic yards (80 bags of 80 lb before waste), which is where a quote is worth getting. If you are still deciding thickness, read how thick a concrete slab should be first, because one extra inch adds 25% to a 4 inch slab.

When to Call a Pro

Placing and finishing more than a yard or two of concrete before it sets takes practice and a crew. If the job is a driveway, garage floor or anything structural, or the truck cannot reach the site, a concrete contractor may cost less in the end than a slab that has to be torn out. Their quote also usually covers forming, base, reinforcement and finishing.

The Short Answer

Under about 1 cubic yard, buy bags. Over about 2 cubic yards, order ready-mix. In between, price a yard of bags (shelf price × 45 for 80 lb bags), get a ready-mix quote with every fee included, and do the break-even sum. Get your volume and bag counts from the Concrete Calculator.