Does this include delivery and finishing?

Enter your all-in labor total or use the concrete cost calculator for itemized delivery, finishing, and reinforcement lines.

Concrete Slab Cost Calculator | Estimate Slab Price Instantly

Q: How much does a concrete slab cost?

Multiply cubic yards (with waste) by your ready-mix rate per yard, then add labor. A 20 by 20 ft slab at 4 inches often runs several thousand dollars depending on local prices.

Q: What is the average slab price per square foot?

Installed slab cost commonly ranges from about 6 to 12 dollars per square foot for basic flatwork, but thickness, reinforcement, and finish drive the number up or down.

Q: How much concrete do I need for a slab?

Multiply length times width times thickness in feet for cubic feet, divide by 27 for cubic yards, then add 5 to 10 percent waste before ordering.

Slab Cost Examples

Tap to load into this concrete slab estimator.

Patio Slab

12×12 ft · 4 in · 10% waste · $150/yd.

Driveway Slab

20×40 ft · 5 in · 10% waste.

Garage Slab

24×24 ft · 6 in · 10% waste.

How Slab Cost Is Calculated

Total = (Cu Yd × $/Yd) + Labor Cu Yd = (L × W × T ÷ 27) × (1 + waste%)

Convert length, width, and thickness to feet.
Multiply for cubic feet, divide by 27 for yards.
Add waste before ordering ready-mix.
Multiply yards by your cost per yard for material.
Add labor cost for the total project estimate.

Pair with the concrete slab calculator for bags and trucks, or the concrete cost calculator for delivery and finishing line items.

Concrete Slab Cost FAQ

How much does a concrete slab cost?

Material is roughly cubic yards × local $/yd plus labor. A 20×20 ft slab at 4 in is about 5 cu yd with waste — at $150/yd that is ~$750 concrete plus labor, which often exceeds material on residential jobs.

What is the average slab price per square foot?

Installed basic flatwork often runs $6–$12 per sq ft depending on region, thickness, and finish. This calculator shows your $/sq ft from your inputs.

How much concrete do I need for a slab?

Volume = length × width × thickness in feet, divided by 27 for cubic yards. Add 5–10% waste for spillage and uneven subgrade.

How is this different from the floor cost calculator?

This tool uses $/cubic yard plus a total labor line. The floor cost calculator prices labor and rebar per square foot.

Concrete Slab Cost Calculator

Patio Slab

Driveway Slab

Garage Slab

How Slab Cost Is Calculated

Concrete Slab Cost FAQ

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