Concrete Slab Calculator: Yards & Bags by Slab Size

Calculate using

Shape

Length ft

ft

Width ft

ft

Thickness inches

in

Quantity (same-size areas)

Density (fixed)

Standard ready-mix concrete (≈4,000 PSI)150 lb/ft³

Waste / Overage

Price per cubic yard (optional)

$yd³

Area (auto)

Calculated area-

Your Concrete Estimate

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Cubic Yards (with waste)

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Cubic Feet

-

80 lb Bags

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60 lb Bags

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Area

What This Result Means