Concrete Calculator › 20×20 slab
Concrete for a 20×20 Slab at 6 inches
A 20×20 slab (400 sq ft) at 6 inches needs about 7.41 cubic yards of concrete — roughly $1,111. See the full breakdown.
You need
7.41 cu yd
Estimated material cost $1,111
Area
400 sq ft
Volume
200.0 cu ft
80-lb bags
334
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Adjust for your project
You need
7.41 cu yd
Estimated material cost $1,111
Area
400 sq ft
Volume
200.0 cu ft
80-lb bags
334
Based on $150 per cuyd national average. Enter your local price for an exact quote. Estimate only.