Cost calculators / Concrete slab

Concrete Slab Cost Calculator: Bagged Material & Installed Price

Price the pour. Count the weight.

Bagged-material cost, base and form budget, and an installed slab benchmark. Every unit price is editable.

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Pour basis

Units
Bag size
More options: allowance, reinforcement

Estimate recalculates as you type

How it’s calculated

Volume = 10 ft × 12 ft × (4 in ÷ 12) = 40 cu ft

Bags = 40 cu ft ÷ 0.6 cu ft ≈ 66.7 → 67

Displayed measurements are rounded; calculations use full precision.

Line cost = quantity × low / high unit price

Concrete: 67 × $6.47–$9.00 = $433–$603

Total = sum of priced lines = $522–$942

USD · US national planning range, July 2026. Installed benchmark $480–$960 uses Angi’s April 2026 range of $4–$8 per sq ft. Pending lines are excluded, not priced at zero.

Estimate

Concrete slab, 10 ft × 12 ft × 4 in

US range · July 2026

Estimated bagged-material cost

$522–$942

$4.35–$7.85 per sq ft, materials only

Bagged materials$522–$942
Installed benchmark$480–$960

Cost breakdown

Cost by material category
Concrete & mix$433–$60371%
Forms & base$86–$31928%
Finish & cure$3–$202%

Itemized materials

Concrete mix
$433–$603
Compacted gravel base
$60–$240
Form boards
$26–$79
Control joints
$3–$20
Unconfirmed materialsQuantity needs confirmation — expand for detailsPending
Project-specific reinforcement
Pending

Confirm reinforcement and support details for the actual load, soil, climate and local code.

Wood stakes and exterior form screws
Pending

Set the stake and screw schedule after the form lumber and site soil are known.

Concrete cure-and-seal
Pending

Choose the curing method/product, then apply its published coverage rate.

Bagged materials, DIY handling$522–$942
67 bags5,360 lb handling load1.48 cu yd net
Material list
Save, print & project assumptions

Edit the project basis to record your estimate.

Warnings

This takeoff covers a simple rectangular slab. Footings, thickened edges, steps, slopes and grade beams need separate geometry.

Confirm reinforcement, subgrade, drainage, load and local-code requirements before purchase.

Bag count is net geometric volume rounded up. Add an explicit allowance if excavation is uneven or spillage is likely.

Project assumptions

user Slab footprint: 10 × 12 ft

Length and width set the form perimeter, base volume and concrete volume.

user Slab thickness: 4 in

The user-set thickness directly controls concrete volume.

user Compacted base: 3 in

QUIKRETE's slab guide calls for 3–4 in of compacted all-purpose gravel; the conservative low-volume default is 3 in.

user Concrete package: 80 lb bags · 0.6 cu ft published yield

Bag count is volume divided by the manufacturer's published yield, always rounded up.

user Extra concrete allowance: 0%

This allowance was explicitly set by the user.

user Reinforcement: Confirm project-specific design

Slab dimensions do not reveal traffic load, soil, exposure or local reinforcement requirements.

2 pallet positions at 42 × 80 lb bags per pallet. Materials exclude tax, delivery, equipment, permits, demolition and pending quantities. The installed comparison is a planning benchmark; confirm scope and local quotes.

How it’s calculated

Volume = 10 ft × 12 ft × (4 in ÷ 12) = 40 cu ft

Bags = 40 cu ft ÷ 0.6 cu ft ≈ 66.7 → 67

Displayed measurements are rounded; calculations use full precision.

Line cost = quantity × low / high unit price

Concrete: 67 × $6.47–$9.00 = $433–$603

Total = sum of priced lines = $522–$942

USD · US national planning range, July 2026. Installed benchmark $480–$960 uses Angi’s April 2026 range of $4–$8 per sq ft. Pending lines are excluded, not priced at zero.

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Material lists on buildmateriallist

DeckConcreteFenceFence picketsFence post depth

Bagged mix versus ready-mix is a logistics choice

Bagged mix gives a transparent retail material number. It also creates a heavy unloading and mixing job. Use the handling weight and pallet equivalent to decide when to call ready-mix suppliers; compare delivered minimums and short-load charges, not only the per-yard figure. To count bags, gravel base and form boards, use the concrete material calculator. Pricing a concrete patio? This slab calculator is the right tool; for pavers instead, use the paver patio cost calculator, and for a driveway the concrete driveway cost calculator.

Regional installed prices move with labor and access

Angi’s April 2026 data places many central-US slab prices near the middle of its national range and coastal markets higher. That is context, not a ZIP quote. A pump, long wheelbarrow path or small-load minimum can matter more than the concrete itself.

What to look for in a contractor quote

Confirm excavation and haul-off, compacted-base depth, reinforcement, forms, thickness, slope, control joints, surface finish, curing, access, pumping, permits and cleanup. A low square-foot price can simply omit half the scope.

What DIY savings do—and do not—remove

DIY removes paid placing and finishing labor. It does not remove material handling, mixer or tool rental, site preparation, inspection requirements or the cost of correcting a poorly timed finish or inadequate subgrade.

Questions before ordering concrete

How is the bagged concrete cost calculated?

The deterministic engine calculates slab volume, divides by the manufacturer’s published yield for 60 lb or 80 lb bags, rounds bags up, and multiplies by the editable low and high bag prices.

Why show total bag weight?

A bagged-mix budget is also a handling decision. A small slab can require several thousand pounds of material, changing delivery, unloading, mixing and whether ready-mix quotes deserve comparison.

What is included in the installed slab range?

The benchmark uses Angi’s April 2026 national $4–$8 per-square-foot range. Actual quotes vary with grading, subbase, reinforcement, finish, access, pumping, permits, demolition and region.

Does this choose reinforcement for me?

No. Dimensions do not reveal loads, soil or local requirements. Project-specific reinforcement remains PENDING unless you explicitly select a fiber-mix surcharge.