Skip to content
SlabCosts
Prices updated January 2026

12×16 Concrete Slab Cost

A 12×16 slab covers 192 square feet. Here's the concrete, bags and cost for 2026 — a common size for a large patio.

Concrete (4", waste in)

2.61 yd³

118 × 80 lb bags

Materials (ready-mix)

$386 – $670

delivered, 4" slab

Installed by a pro

$1,056 – $2,304

4" slab, national average

12×16 slab cost calculator

Adjust thickness, waste or region — the cost updates live.

Waste & region

Order extra for spillage & uneven subgrade. 10% is typical.

Installed cost estimate

$1,056 – $2,304

192 sq ft · 2.61 yd³ concrete

Bags of concrete needed (rounded up)

118

80 lb

157

60 lb

188

50 lb

235

40 lb

Ready-mix (delivered)
$386 – $670
Bagged mix (80 lb, DIY)
$649 – $1,062
Installed by a pro
$1,056 – $2,304

Estimate only — not a quote. Bag counts are rounded up and include a 10% waste allowance.

Installed $1,056 – $2,304

12×16 slab cost by thickness

Thickness Concrete 80 lb bags Ready-mix Installed
4" 2.61 yd³ 118 $386 – $670 $1,056 – $2,304
5" 3.26 yd³ 147 $467 – $794 $1,200 – $2,448
6" 3.91 yd³ 176 $549 – $918 $1,344 – $2,592

Includes a 10% waste allowance; bag counts rounded up. National US averages, January 2026.

You'll also need

Sized for this exact slab — tap any item to open its calculator with your measurements already filled in.

Gravel base

2.73 yd³

4" compacted base under the slab

≈ $82 – $177

Open calculator
Rebar

14 sticks

#4 bar, 18" grid (20 bars)

≈ $98 – $182

Open calculator
Bedding sand

0.59 yd³

~1" leveling layer

≈ $17 – $34

Open calculator

12×16 concrete slab: what to expect

A 12×16 slab covers 192 square feet. At the standard 4" thickness it takes about 2.61 cubic yards of concrete once you allow 10% for waste, which is roughly 118 × 80 lb bags if you mix by hand. Stepping up to 6" — sensible if it'll carry a vehicle — raises that to about 3.91 cubic yards.

Budget around $1,056 – $2,304 to have a 4" slab this size poured and finished by a contractor, or roughly $386 – $670 in ready-mix if you're doing the labor yourself. On top of the concrete you'll need about 2.73 yd³ of gravel base and 14 sticks of rebar.

Compare nearby sizes

Planning something bigger or smaller? Jump straight to the cost for a nearby size.

Size Concrete (4") 80 lb bags Installed cost
10×10 1.36 yd³ 62 $550 – $1,200
10×12 1.63 yd³ 74 $660 – $1,440
12×12 1.96 yd³ 88 $792 – $1,728
14×14 2.66 yd³ 120 $1,078 – $2,352
10×20 2.72 yd³ 123 $1,100 – $2,400
15×15 3.06 yd³ 138 $1,238 – $2,700

See all common slab sizes →

Prices updated January 2026 National US averages · reviewed quarterly

Volumes use standard bag yields and a 10% waste allowance; costs are national US averages that vary by region, mix and finish. See our methodology for exactly how each figure is worked out, or check the reference sources:

Slab cost by project

Concrete Slab Cost Cost per sq ft + calculator Garage Slab Cost Typical 20×20 / 24×24 Driveway Slab Cost Concrete vs asphalt Patio Slab Cost 10×10 to 20×20 Shed Base Cost Small pads

Frequently asked questions

How much does a 12×16 concrete slab cost?
A 12×16 slab (192 sq ft) costs about $1,056 – $2,304 installed at 4" thick in 2026, or $1,344 – $2,592 at 6". DIY in materials, the ready-mix runs about $386 – $670 at 4".
How many yards of concrete for a 12×16 slab?
At 4" thick a 12×16 slab needs about 2.61 cubic yards including 10% waste (2.37 yd³ net). At 6" it needs about 3.91 cubic yards.
How many bags of concrete for a 12×16 slab?
At 4" you'd need roughly 118 × 80 lb bags, 157 × 60 lb bags or 235 × 40 lb bags. That's a lot of mixing — past about a cubic yard, ready-mix is usually cheaper and easier.
What base and rebar does a 12×16 slab need?
Plan on about 2.73 cubic yards of compacted gravel base and roughly 14 sticks of #4 rebar on an 18" grid. The "You'll also need" cards size these for you.