An 80-pound bag of standard concrete mix typically costs $5-$9 at U.S. home improvement and building-supply stores, with an average near $7. The final budget depends on mix type, quantity, delivery, local prices, and whether the work requires tools or paid labor.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Standard 80-lb bag | $5 | $7 | $9 | About 0.6 cubic foot of mixed concrete |
| Fast-setting or specialty bag | $7 | $10 | $15 | Product and store prices vary |
| 45 bags, about 1 cubic yard | $225 | $315 | $405 | Concrete only, before tax and delivery |
What an 80-pound bag costs for common concrete jobs
A standard 80-pound bag of concrete mix generally costs $5-$9 before sales tax. A practical planning figure is about $7 per bag, or roughly $11.67 per cubic foot based on an estimated yield of 0.6 cubic foot. Fast-setting, crack-resistant, high-strength, or other specialty mixes may cost more, commonly $7-$15 per bag.
For a small project, the mix itself is often a modest expense; quantity, delivery, and labor can raise the total substantially. A 4-by-4-foot slab that is 4 inches thick needs about 18 bags before allowance for waste. At the average bag price, the concrete mix costs about $126; a few extra bags may be prudent for uneven ground or spillage.
Assumptions: U.S. retail pricing, standard bagged mix, typical 0.6-cubic-foot yield, and no tax, delivery, or labor.
What the concrete quote includes beyond the mix
Bag prices cover dry mix, not the full cost of completing a pour. A contractor quote may also include site preparation, forms, placement, tools, cleanup, and disposal. For a DIY job, these expenses may appear as separate purchases or rental charges.
| Cost item | Typical range | How it affects the budget | Pricing basis |
|---|---|---|---|
| Standard concrete mix | $5-$9 | Core material; specialty formulas cost more | Per 80-lb bag |
| Paid labor | $50-$100 | Mixing, placing, finishing, and cleanup | Per worker-hour |
| Delivery or handling | $0-$100+ | Store delivery, distance, and minimum charges vary | Per order |
| Tool rental and forms | $25-$150 | Mixer, tamper, wheelbarrow, or form materials | Per project or day |
Small orders may be picked up without a delivery fee if the vehicle can safely carry the load. An 80-pound bag is heavy, and transporting many bags requires a vehicle with suitable payload capacity. Compare the complete project quote, not just the per-bag shelf price.
How mix type and slab depth change the bag count
Bag count depends on the project’s volume. One 80-pound bag typically yields about 0.6 cubic foot, so a cubic yard requires approximately 45 bags. Actual yield can vary by product; the package instructions should determine the final order. Add roughly 5%-10% for normal waste or minor measurement differences.
Thickness changes the quantity quickly: a 10-by-10-foot pad at 4 inches deep uses about 56 bags before waste, while the same pad at 6 inches deep takes about 84. For a post hole measuring 12 inches across and 24 inches deep, the volume is close to 1.6 cubic feet, or about three bags before extra allowance.
Verify the specified strength and setting time before substituting a cheaper mix. Standard-purpose mix may suit walks and general repairs, while rapid-setting products can be useful for posts or time-sensitive work. A high-strength label alone does not determine suitability; project plans, local code, and manufacturer directions matter.
Ways to control labor and delivery charges
For a DIY pour, labor is unpaid, but mixing and placement still take time. One person may need 10-15 minutes per bag for mixing and handling, depending on the mixer, access, and finishing requirements. Pouring several dozen bags by hand can take hours and may make it harder to maintain a consistent finish.
Contractor labor commonly runs about $50-$100 per worker-hour, though some crews quote a project minimum instead of hourly billing. A basic small pour may need two workers for several hours; complicated access, reinforcement, demolition, or a tight schedule can increase the crew time.
Delivery is worth pricing against pickup once the order reaches roughly 10-15 bags, especially when the site is distant or the vehicle cannot carry the load safely. Ask whether the fee includes unloading and whether there is a minimum order. Confirm delivery, handling, and any minimum labor charge before accepting a quote.
Why 80-pound bag prices differ by region
Store competition, freight distance, local demand, and product availability can shift prices. In a large metro area with multiple retailers, a standard bag may be near $5-$8; in remote areas or locations with higher freight costs, $7-$11 is possible. These are planning ranges, not fixed regional price guarantees.
Taxes and delivery can widen the difference between shelf prices and checkout totals. During busy construction periods, local stock may be limited, and the available mix may be a more expensive brand or formula. Check nearby stores and compare the cost per cubic foot, not only the price per bag. For equivalent standard mixes, yield and availability make a regional price comparison more useful than brand name alone.
Three bagged-concrete estimates for typical projects
A 3-by-3-foot walkway pad, 4 inches thick, needs about 7 bags by volume. With one extra bag for waste, materials cost approximately $40-$72 at $5-$9 each. Pickup and basic hand tools can keep the total near $50-$120, excluding new forms or decorative finishing.
A 4-by-4-foot shed pad, 4 inches thick, needs about 18 bags, or roughly 20 with a small waste allowance. Concrete costs about $100-$180; forms and tool expenses may add $25-$100. A DIY estimate could land around $125-$280 before tax, depending on supplies already on hand.
A 10-by-10-foot pad, 4 inches thick, requires about 56 bags by volume and approximately 59-62 with a waste allowance. At $5-$9 per bag, the mix alone is roughly $295-$558. Delivery, forms, and paid labor can bring a contractor-installed or fully equipped project well above that amount. These estimates assume level access and a straightforward pour, without excavation or reinforcement.
Which buying choices lower the concrete bill
Measure the pour in feet and inches, calculate its volume, and check the bag’s stated yield before buying. Ordering a modest waste allowance helps avoid an emergency store trip, but excess bags may be difficult to return once opened or exposed to moisture. Keep unopened bags dry and verify the retailer’s return policy.
Use standard mix when it meets the project specification; avoid paying extra for rapid setting or specialty performance that the job does not require. Compare pickup with delivery, borrow or rent tools only when needed, and prepare forms and the work area before mixing begins. For large pours, compare bagged mix with ready-mix concrete, including delivery minimums and site access.
The cheapest per-bag option is not always the lowest-cost project choice if it creates extra trips, wasted material, or unsuitable concrete. Request itemized quotes when hiring help, and compare bag count, mix type, preparation, cleanup, and disposal on the same scope.