A poured concrete cost calculator estimates material from slab dimensions, then adds delivery, site preparation, reinforcement, and labor. In the U.S., a standard 4-inch slab commonly costs $6-$12 per square foot installed, while small or difficult pours can exceed that range because of minimum charges and access constraints.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Installed standard slab | $6/sq ft | $9/sq ft | $12/sq ft | 4-inch slab, typical access and site prep |
| Ready-mix concrete | $125/cu yd | $155/cu yd | $190/cu yd | Concrete only; delivery and fees vary |
| Small-project minimum | $500 | $1,200 | $2,500 | Can apply to small patios, pads, and repairs |
| Concrete driveway | $8/sq ft | $12/sq ft | $18/sq ft | Removal, thickness, finish, and reinforcement affect price |
How much does poured concrete cost by slab size?
For budgeting, a basic 4-inch slab with ordinary access and a broom or basic trowel finish often falls around $6-$12 per square foot installed. A 10-by-10-foot pad may cost roughly $600-$1,200, but contractors may charge more when the job is too small to use a full ready-mix load. Larger patios and garage floors can achieve lower per-square-foot rates because setup and delivery costs are spread across more area.
Use square footage for an early installed-price check, but calculate cubic yards to estimate the concrete order. Concrete volume is length × width × thickness in feet, divided by 27. Add about 5%-10% for waste, uneven subgrade, and placement losses. A 10-by-20-foot slab at 4 inches is 66.7 cubic feet, or about 2.47 cubic yards before waste; with 7% extra, the order is roughly 2.65 cubic yards.
Thickness changes both volume and strength requirements. A 4-inch slab is common for patios and many residential walkways, while driveways may call for 5-6 inches depending on vehicle loads, soil, and local practice. The calculator should use the specified thickness, not simply the visible surface area. Assumptions: standard ready-mix, normal ground access, basic finish, and no major drainage or demolition work.
| Example slab | Approx. concrete order | Installed budget | Typical scope |
|---|---|---|---|
| 10 × 10 ft, 4 in | 1.4-1.5 cu yd | $600-$1,500 | Small patio or utility pad; minimum may apply |
| 12 × 20 ft, 4 in | 3.3-3.5 cu yd | $1,400-$2,900 | Backyard patio with basic prep |
| 20 × 20 ft, 5 in | 6.3-6.7 cu yd | $2,800-$5,500 | Garage slab or parking pad; reinforcement varies |
What goes into a poured concrete quote?
A quote combines more than the truck’s concrete charge. It may include grading and base stone, forming, reinforcement, placement and finishing labor, delivery, and cleanup. Ask whether excavation, disposal, compaction, control joints, and final grading are included; unclear scope can make two apparently similar bids differ substantially.
Concrete itself is often only part of the installed total; site work and crew time can be equally important. Ready-mix commonly runs about $125-$190 per cubic yard before special fees, while a contractor’s delivered-and-placed price reflects labor, equipment, overhead, and risk. The table shows representative components; small-job minimums and local conditions can shift the totals.
| Quote component | Typical price | What changes it | Usually included? |
|---|---|---|---|
| Ready-mix concrete | $125-$190/cu yd | Strength, additives, local supply | Sometimes itemized |
| Base, grading, forms | $1-$4/sq ft | Excavation depth, soil, base thickness | Varies by bid |
| Reinforcement | $0.50-$2/sq ft | Mesh, rebar size, spacing, placement | Often listed separately |
| Placement and finishing labor | $2-$6/sq ft | Pour size, finish, crew access | Usually included in installed rate |
| Delivery and load fees | $50-$250 per load | Distance, short load, wait time | Check the ready-mix quote |
Labor estimates may be expressed as crew time rather than a simple hourly charge. For a straightforward residential pour, labor and finishing can represent several hours to a full workday, followed by curing time before normal use. is a useful check when a contractor itemizes labor; typical local labor rates may range from $50-$100 per worker-hour, though many bids price the complete task.
How thickness, reinforcement, and access change yardage
Thickness is one of the clearest cost drivers. Moving from 4 inches to 6 inches increases concrete volume by 50% for the same footprint, before considering any stronger mix or reinforcement. For a 20-by-20-foot area, the order may rise from about 5.5 cubic yards including waste at 4 inches to roughly 8.2 cubic yards at 6 inches.
Small specification changes can add multiple cubic yards on a large slab. Reinforcement can add approximately $0.50-$2 per square foot for common mesh or rebar arrangements, with heavier steel and closer spacing costing more. Fiber additives may be quoted per cubic yard; they do not automatically replace structural reinforcement specified by an engineer or required for the job.
Access also matters. If a ready-mix truck can discharge beside the forms, placement is typically simpler. A backyard pour requiring wheelbarrows, a line pump, or a concrete pump can add roughly $300-$1,500 or more depending on equipment, setup, distance, and minimum charges. Sloped sites, weak soil, retaining edges, drainage corrections, and difficult demolition can raise excavation and labor costs.
Mix specifications should match use and local requirements. Contractors may quote a higher-strength mix, air entrainment for freeze-thaw exposure, or additives for placement conditions. A $10-$30 per cubic yard adjustment is plausible for some mix changes, but local supplier pricing and the requested specification control. Do not lower a required strength or thickness simply to reduce a calculator result.
How can controlled scope lower the slab price?
Keep the footprint and finish practical. A simple rectangle generally needs less forming and cutting than an irregular outline, and a standard broom finish usually costs less than stamped, colored, exposed-aggregate, or polished finishes. Decorative finishes can add about $2-$10 or more per square foot, depending on the method and local labor.
Compare the same written scope, not just the lowest total. Request at least three quotes that specify dimensions, thickness, concrete strength, reinforcement, base preparation, finish, joints, cleanup, and disposal. A bid that excludes excavation or concrete removal is not directly comparable to one that includes those tasks.
Homeowners may reduce labor charges by clearing the work area and confirming access before the crew arrives, if the contractor agrees. Do not excavate or compact without checking required depth, drainage, and base specifications. A poor subgrade can cause settling or cracking and cost more to correct than the preparation saved.
Consider whether replacement is necessary. Sealing, patching, or leveling can cost less for limited surface damage or isolated settlement, but repairs may not correct widespread movement, severe cracking, or drainage failure. Get a repair quote alongside replacement pricing when the slab’s condition is uncertain, and compare expected service life rather than the upfront figure alone.
How many hours does a residential concrete crew need?
A small, ready-to-pour pad may take a crew several hours for placement and finishing, while a larger driveway or garage slab can require most of a day. Excavation, base installation, forms, reinforcement, and inspection may occur on earlier days. The concrete truck’s delivery window and the time available to finish the mix make a well-prepared site especially important.
Labor time depends more on preparation and site logistics than on square footage alone. A 200-square-foot slab with truck access and prepared forms can be simpler than a smaller area reached only through a narrow side yard. Pumping, hand-carrying, intricate edges, multiple pours, and decorative finishing can extend the schedule and increase labor or equipment charges.
Concrete often supports light foot traffic after about 24-48 hours, but that does not mean it has reached full strength. Vehicle use may need to wait around 7 days or longer, and curing continues for weeks. Follow the contractor’s instructions for weather, curing compound, and load restrictions; rushing use can damage the finished work.
Why do concrete prices differ by region and season?
Installed prices in expensive metro areas can run roughly 10%-25% above a comparable rural or lower-cost market because of labor, insurance, fuel, and operating costs. Remote locations may instead face higher delivery charges, fewer suppliers, or minimum-load fees. These are planning ranges, not a fixed regional price list; nearby contractor quotes provide the best local benchmark.
Delivery distance and supplier availability can matter as much as the advertised price per cubic yard. Ready-mix trucks have limited travel and unloading windows, and a long wait may lead to an additional charge, often around $75-$150 per hour after the included allowance. Ask whether the quote includes fuel, environmental, small-load, and waiting fees.
Season affects scheduling and concrete placement. Spring and summer demand can make contractor calendars tighter, while freezing temperatures, heavy rain, or extreme heat may require protective measures or rescheduling. Cold-weather blankets, hot-water mix, accelerators, or other precautions can add hundreds of dollars on some jobs. Scheduling flexibility can help, but weather protection should not be removed when conditions require it.
What do three common poured concrete projects cost?
These examples illustrate how area, thickness, access, and scope shape a quote. They assume ordinary residential access and basic finishes; they do not represent guaranteed local bids. Concrete order quantities include a modest allowance for waste, while installed totals include typical preparation and labor for each scenario.
A small pad can have a much higher per-square-foot price than a large slab because fixed delivery and setup charges are spread over less area. Demolition, unusual soil, drainage work, premium finishes, permits, and regional labor rates can push any example outside the range.
| Project | Scope and quantity | Estimated installed total | Approx. price per sq ft |
|---|---|---|---|
| Shed pad | 10 × 12 ft, 4 in; about 1.7-1.9 cu yd with waste | $900-$2,000 | $7.50-$16.70 |
| Patio | 12 × 20 ft, 4 in; about 3.3-3.5 cu yd with waste | $1,400-$2,900 | $5.80-$12.10 |
| Driveway | 20 × 40 ft, 5 in; about 12.3-13 cu yd with waste | $6,400-$14,400 | $8-$18 |
A driveway total may include forming, reinforcement, joints, and basic finishing, but removal of an existing driveway can add roughly $2-$6 per square foot for breaking, hauling, and disposal. A steep slope or restricted truck access can increase the estimate further. Check whether the price includes the apron, drainage changes, and any sidewalk or curb work.
How to use a concrete calculator without overordering
Measure the actual pour dimensions in feet and convert thickness from inches to feet by dividing by 12. Multiply length × width × thickness to get cubic feet, divide by 27 for cubic yards, then add 5%-10% for waste. For irregular shapes, split the footprint into rectangles, calculate each separately, and add the quantities.
Confirm the final order with the contractor and ready-mix supplier before scheduling delivery. For example, a 15-by-24-foot slab at 4 inches is 120 cubic feet, or 4.44 cubic yards; adding 7% gives about 4.75 cubic yards. The supplier may recommend rounding based on truck increments, chute access, and the site’s actual grade.
A calculator estimates material, not the complete project price. Add separate allowances for excavation, compacted base, forms, reinforcement, pumping, disposal, permits where required, and contractor labor. If the site is uneven, measure thickness at several points and discuss the average with the installer rather than assuming a perfectly level base.
Before accepting a quote, verify the concrete strength and thickness, included base depth, reinforcement details, finish, joint layout, delivery fees, cleanup, and payment schedule. Assumptions: dimensional estimate only; local supplier and contractor pricing determines the final quote. A written scope paired with the calculator’s yardage gives a more dependable budget than a square-foot figure alone.