Square Footage
Larger slabs cost more in total but often less per square foot because mobilization and crew setup are spread across more area.
2026 Slab Cost Hub
Concrete Slab Cost 2026: Per Square Foot, Per Cubic Yard & Every Project Type
By Area (installed)
- Plain slab
- $6 - $12/sq ft
- Reinforced
- $7 - $14/sq ft
- Decorative
- $12 - $28/sq ft
- Average project
- $6 - $12/sq ft
- Labor
- 40-50% of total
By Volume (materials only)
- Ready-mix
- $150-$180/yd3
- National avg
- $166/yd3
- 80 lb bag
- $6-$8 each
- Bag yield
- 0.60 cu ft/bag
- Short load
- +$50-$150 fee
Concrete Slab Cost Calculator
Select your project type for pre-filled dimensions, or enter custom measurements.
Your Estimate
$4,515 - $6,108
Garage Floor - 576 sq ft - 4 in thick
$7.84 - $10.60
per sq ft
A garage floor is one of the highest-ROI concrete projects: it protects stored vehicles, adds usable workspace, and keeps repair risk lower later.
Ready-mix concrete (7.8 yd3)$1,298
Gravel subbase (4 in)$461
Wire Mesh$317
Vapor barrier$86
Edge thickening$0
Broom finish$144
Materials subtotal$2,306
Installation labor$2,880
Permit estimate$125
Switch to bagged concrete? 353 bags of 80 lb mix = $2,471 vs. $1,298 ready-mix. Ready-mix saves $1,173 before labor.
Need volume only? Use the concrete slab calculator for exact cubic yards and bags.
A concrete slab costs $6 to $12 per square foot installed on average, or $5,400 to $10,800 for a typical 30 x 30 ft slab. Ready-mix concrete alone costs $150 to $180 per cubic yard, with a national average of $166 per cubic yard. Use the calculator above, then calculate exactly how much concrete you need for final yardage and bag counts.
What Goes Into the Cost of a Concrete Slab?
| Cost Component | Cost Range | % of Total | Notes |
|---|---|---|---|
| Ready-mix concrete | $150-$180/yd3 | 15-25% | National avg $166/yd3; short load fee extra under 4 yd3 |
| Gravel subbase (4 in) | $0.60-$1.20/sq ft | 5-10% | Critical for drainage and load distribution |
| Wire mesh / Rebar | $0.50-$2.00/sq ft | 4-10% | Mesh for patios; rebar for garages, foundations, RV pads |
| Vapor barrier | $0.10-$0.20/sq ft | 1-2% | Prevents moisture migration into slab |
| Forms & stakes | $0.25-$0.60/sq ft | 2-4% | Lumber, stakes, and bracing |
| Labor (pour + finish) | $3.50-$7.00/sq ft | 40-50% | Largest single cost component |
| Finish (decorative) | $0-$10.00/sq ft | 0-25% | Zero for plain; up to stamped or polished |
| Permits & inspection | $50-$500 flat | 1-5% | Higher for foundations |
Concrete Slab Cost by Project Type - 2026
| Project | Typical Size | Sq Ft | Thickness | Cost Range | Notes |
|---|---|---|---|---|---|
| Shed foundation | 10 x 10 - 16 x 20 ft | 100-320 | 4 in | $600-$3,840 | No rebar typically needed |
| Patio | 12 x 12 - 20 x 20 ft | 144-400 | 4 in | $864-$4,800 | See concrete patio cost for full detail |
| Garage floor (1-car) | 12 x 20 - 16 x 24 ft | 240-384 | 4-5 in | $1,440-$5,376 | Wire mesh standard |
| Garage floor (2-car) | 20 x 20 - 24 x 24 ft | 400-576 | 4-5 in | $2,400-$6,912 | Most common project |
| Garage floor (3-car) | 24 x 36 - 30 x 36 ft | 864-1,080 | 5 in | $6,048-$15,120 | Rebar for heavy vehicles |
| RV pad | 14 x 40 - 16 x 50 ft | 560-800 | 6 in | $3,360-$11,200 | Rebar required; 6 in minimum |
| Mobile home slab | 14 x 70 - 16 x 80 ft | 980-1,280 | 6 in | $5,880-$17,920 | Engineered design required |
| House foundation | 30 x 40 - 50 x 60 ft | 1,200-3,000 | 6 in | $7,200-$42,000 | Rebar, vapor barrier, inspection |
Concrete Slab Cost by Thickness - Materials Only vs. Installed
Per 100 square feet. Includes 10% waste. Ready-mix at $166/yd3.
| Thickness | Volume (100 sq ft) | Bags Needed (80 lb) | Ready-Mix Cost | Bag Cost | Installed Cost |
|---|---|---|---|---|---|
| 3.5 in | 1.08 yd3 | 49 bags | $179 | $343 | $600-$1,200 |
| 4 in | 1.23 yd3 | 56 bags | $204 | $392 | $600-$1,200 |
| 5 in | 1.54 yd3 | 70 bags | $256 | $490 | $700-$1,400 |
| 6 in | 1.85 yd3 | 84 bags | $307 | $588 | $800-$1,680 |
Which thickness do you need?
3.5 in for foot-traffic patios; 4 in for standard patios, shed bases, and walkways; 5 in for garage floors and heavy driveways; 6 in for foundations, RV pads, and mobile home slabs. Going from 4 in to 6 in adds about 50% to concrete material cost but often only 15-20% to total installed cost.
Concrete Slab Cost by Region - 2026
The same 24 x 24 ft garage floor can cost roughly 60% more in Los Angeles than Dallas, driven mostly by labor market variation.
| Region | States | Installed Cost/Sq Ft | vs. National Avg | Key Driver |
|---|---|---|---|---|
| Pacific Coast | CA, WA, OR | $8.50-$16.00 | +25% to +45% | Highest labor market nationally |
| Northeast | NY, MA, CT, NJ, PA | $8.00-$15.00 | +15% to +35% | NYC/Boston metro premium |
| Mountain West | CO, UT, AZ, NV | $7.00-$13.00 | +/-10% | Denver/Phoenix urban premium |
| Midwest | IL, OH, MI, MN, WI | $5.50-$11.00 | -10% to +5% | Most competitive market |
| South Central | TX, OK, AR, LA | $5.00-$10.00 | -15% to -5% | Lowest labor costs |
| Southeast | FL, GA, NC, SC | $5.50-$11.00 | -10% to +5% | FL coastal areas higher |
Ready-Mix vs. Bagged Concrete: Full Cost Comparison by Project Size
The right choice depends on project volume. Bags win for very small pours; ready-mix wins once the slab is large enough to absorb delivery fees.
| Project Volume | Bags (80 lb) | Bag Cost | Ready-Mix Cost | Short Load Fee | Total Ready-Mix | Winner |
|---|---|---|---|---|---|---|
| 0.25 yd3 | 12 bags | $84 | $42 | +$100 | $142 | Bags |
| 0.50 yd3 | 23 bags | $161 | $83 | +$100 | $183 | Bags |
| 0.75 yd3 | 34 bags | $238 | $125 | +$100 | $225 | Close |
| 1.00 yd3 | 45 bags | $315 | $166 | +$100 | $266 | Ready-Mix |
| 1.50 yd3 | 68 bags | $476 | $249 | +$75 | $324 | Ready-Mix |
| 2.00 yd3 | 90 bags | $630 | $332 | +$50 | $382 | Ready-Mix |
| 3.00 yd3 | 135 bags | $945 | $498 | $0 | $498 | Ready-Mix |
| 5.00 yd3 | 225 bags | $1,575 | $830 | $0 | $830 | Ready-Mix |
| 10.0 yd3 | 450 bags | $3,150 | $1,660 | $0 | $1,660 | Ready-Mix |
Use bags under 0.75 yd3
Best for tiny pads, remote locations, and slow DIY pours where truck timing creates more stress than value.
Compare 0.75-1.5 yd3
Ask your supplier for the exact short load policy. Local fees decide the winner in this zone.
Use ready-mix over 1.5 yd3
Large slabs need consistent mix, fast placement, and less manual mixing. Add pump cost for difficult access.
Concrete PSI Strength vs. Cost - Which Mix Do You Need?
| PSI Rating | Cost Premium | Applications | Notes |
|---|---|---|---|
| 2,500 PSI | Base price | Sidewalks, light patios | Minimum residential; not for vehicle loads |
| 3,000 PSI | +$0-$5/yd3 | Standard slabs, patios, driveways | Most common residential mix |
| 3,500 PSI | +$5-$10/yd3 | Garage floors, heavy driveways | Better freeze-thaw resistance |
| 4,000 PSI | +$10-$20/yd3 | Foundations, RV pads | Required by many foundation codes |
| 5,000 PSI | +$20-$40/yd3 | Commercial high-load slabs | Rarely needed for residential |
In freeze-thaw climates, specify air-entrained concrete. It typically adds $5-$15/yd3 and helps reduce scaling and cracking.
8 Factors That Determine Your Concrete Slab Cost
Thickness
Going from 4 in to 6 in adds about 50% to concrete material but much less to total installed cost because labor is mostly area-based.
Reinforcement Type
Wire mesh is economical for light slabs. Rebar is the right choice for foundations, RV pads, and heavy vehicle loads.
Finish Type
Plain and broom finishes keep cost controlled. Stained, aggregate, and stamped finishes add substantial labor and surface cost.
Site Preparation
Poor drainage, roots, old concrete, slope, and difficult access can add real cost before the pour begins.
Region
Labor markets create the largest geographic swing; concrete material prices move less than installation labor.
Concrete Source
Ready-mix wins for most slabs over 1.5 yd3. Bags are only attractive for small, slow, DIY pours.
Permits & Inspections
Patio permits may be small; foundation permits and inspections can be a meaningful separate line item.
5 Proven Ways to Reduce Your Concrete Slab Cost
Tip 1
Right-size thickness
Use 4 inches for patios and shed bases where appropriate. Save 6 inches for foundations, RV pads, and heavy vehicle slabs.
Tip 2
Get 3+ quotes
Labor varies more than ready-mix prices. Multiple local bids are the biggest practical lever on total cost.
Tip 3
Use wire mesh where appropriate
Mesh can save hundreds on light-duty slabs, but do not substitute it where rebar is required.
Tip 4
Avoid short load fees
If you are near 3-4 yd3, ask suppliers about minimums or combine nearby concrete work into one delivery.
Tip 5
Do your own prep and cleanup
Clearing, rough grading, and form cleanup can reduce labor without taking on the critical pour and finish.
DIY Concrete Slab: When It Makes Sense (and When It Doesn't)
| Project | DIY Feasibility | Reason |
|---|---|---|
| Shed base (100 sq ft, 4 in) | Feasible | About 1 yd3; bagged concrete can work |
| Small patio (144 sq ft, 4 in) | Challenging | Ready-mix timing matters; need helpers |
| Garage floor (576 sq ft, 4 in) | Not recommended | About 7 yd3; finishing is critical |
| Foundation (1,200+ sq ft, 6 in) | Never | Engineering and inspections required |
| RV pad (560 sq ft, 6 in) | Not recommended | Rebar-reinforced slab under heavy loads |
| Decorative finish (any size) | No | Specialized tools and timing |
576 sq ft garage floor DIY reality check
Contractor total: $3,680-$4,960. DIY material cost: about $1,600-$2,000. After tool rental, pump access, helpers, and defect risk, realistic savings are often $1,000-$1,800 only if you have prior concrete experience.
Concrete Slab Cost - Frequently Asked Questions
How much does a concrete slab cost?+
A concrete slab costs $6 to $12 per square foot installed on average, or $5,400 to $10,800 for a typical 30 x 30 ft slab. Prices range from simple shed bases to decorative stamped slabs.
How much does a yard of concrete cost?+
Ready-mix concrete costs $150 to $180 per cubic yard, with a national average of $166 per cubic yard. Short load fees of $50 to $150 often apply under 3 to 4 cubic yards.
How much does a concrete slab cost per square foot?+
Plain slabs cost $6-$12/sq ft installed. Reinforced slabs with wire mesh run $7-$13/sq ft. Rebar-reinforced slabs cost $8-$14/sq ft before decorative finish upgrades.
How much does a 4-inch concrete slab cost?+
A 4-inch concrete slab costs $6-$12 per square foot installed for plain concrete. A 400 sq ft slab typically costs $2,400-$4,800 installed.
How much does a concrete garage floor cost?+
A standard 2-car garage floor, 24 x 24 ft or 576 sq ft, costs $3,456 to $6,912 installed, or about $6-$12 per square foot.
Is ready-mix or bagged concrete cheaper for a slab?+
For projects under 0.75 cubic yards, bagged concrete can be cheaper because ready-mix short load fees are high. For projects over 1.5 cubic yards, ready-mix is usually cheaper and much faster.
How long does a concrete slab last?+
A properly installed concrete slab can last 50 to 100+ years. The key variables are subbase preparation, adequate thickness, correct PSI, control joints, and sealing in exposed conditions.