Construction Cost Calculator
12x12 Concrete Slab Cost Calculator
Estimate the cost of a 12x12 concrete slab, including concrete yards, ready-mix cost, delivery fees, short-load charges, base material, reinforcement, forms, labor, tax, and total installed cost.
Slab size
144 sq ft
Common thickness
4 in
Typical use
Shed / patio
12x12 slab quick math
Final cost depends on local ready-mix pricing, delivery minimums, access, forms, base prep, reinforcement, finish, and labor.
Calculate 12x12 slab cost
This calculator keeps the slab size fixed at 12 ft by 12 ft and lets you adjust thickness, base depth, ready-mix pricing, delivery fees, reinforcement, forms, labor, and tax.
Planning note
A 12x12 shed pad is commonly estimated at 4 inches thick for light storage use with proper base preparation.
12x12 slab estimate
Total estimated cost
$1,838
$13 per sq ft.
This calculator is for estimating only. Actual project cost depends on site prep, excavation, access, forms, reinforcement, labor, finishing, local ready-mix prices, permits, and contractor requirements.
Popular small slab size
A 12x12 slab is common for sheds, patios, equipment pads, utility pads, and backyard flatwork.
Cost breakdown
Estimate concrete, delivery, short-load fees, base material, reinforcement, forms, labor, tax, and total installed cost.
Compare thickness
Quickly compare 4 inch, 5 inch, and 6 inch slab options for heavier uses or stronger pad requirements.
12x12 concrete slab cost FAQs
How many yards of concrete are in a 12x12 slab?
A 12x12 slab at 4 inches thick is about 1.78 cubic yards before waste. With 10 percent waste, it is about 1.96 cubic yards.
Why can a 12x12 slab cost more per square foot?
Small slabs often have higher cost per square foot because delivery fees, forms, labor setup, and finishing time are spread across only 144 square feet.
Is 4 inches thick enough for a 12x12 slab?
Four inches is common for light-use patios, shed pads, and utility slabs, but hot tubs, vehicles, heavy equipment, and poor soil may require more thickness and reinforcement.
Should I include a short-load fee?
Yes, if your supplier charges a minimum delivery fee or short-load charge for small ready-mix orders. A 12x12 slab may fall below some supplier minimums.