Concrete Slab Cost Calculator

Get an installed-cost estimate for a concrete slab — driveway, patio, garage floor, shed pad, you name it. Enter dimensions, pick reinforcement and finish, and choose your region; we'll show cubic yards of concrete, material cost, and an installed cost range that includes labor and finishing premiums.

Concrete Slab Cost Estimator

Length (ft)

Width (ft)

Thickness (in)

Reinforcement

Finish type

Region

Ready-mix concrete price ($/yd³)

Slab Cost Breakdown

Slab area—

Cubic yards of concrete—

Concrete material cost—

Installed cost per sq ft—

Decorative / finish premium—

Total installed cost (low)—

Total installed cost (high)—

National average runs $4–$8 per sq ft for a basic broom-finished slab and $8–$18 per sq ft for stamped or decorative concrete. Regional labor rates, site access, and demolition of existing concrete can push real-world quotes higher. Always get 2–3 written bids before signing on a slab job.

What Drives Concrete Slab Cost

Concrete itself: $130–$180 per cubic yard delivered (more if your truck has a short pour or long-distance haul fee).
Labor: the biggest variable. Forming, pouring, finishing, and curing typically runs $3–$6 per sq ft in most regions — higher in major metro areas with strong union labor markets.
Reinforcement: wire mesh adds about $0.30–$0.60 per sq ft; rebar grid adds $1–$2 per sq ft installed.
Finish: a standard broom finish is included in base labor. Exposed aggregate adds $3–$6 per sq ft; stamped concrete adds $6–$12 per sq ft for the patterns, release powder, and sealers.
Sub-grade prep: a flat compacted base is critical. If the site needs excavation, gravel base, or vapor barrier, expect $1–$3 per sq ft on top.

How Much Concrete Will I Need?

The volume math is simple: cubic yards = (length × width × thickness ÷ 12) ÷ 27. A 20 × 20 ft slab at 4″ thick comes out to ~4.94 cu yd. Most contractors order 5–10% extra to account for sub-grade irregularities and spillage — use our concrete calculator for a detailed yardage estimate.