Concrete slabs are ordered by the cubic yard. This section covers common slab sizes with cubic yards and bag counts at several thicknesses.
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Slab sizes
8 by 8 Concrete SlabCubic yards of concrete for a 8 by 8 slab at common thicknesses.10 by 10 Concrete SlabCubic yards of concrete for a 10 by 10 slab at common thicknesses.10 by 12 Concrete SlabCubic yards of concrete for a 10 by 12 slab at common thicknesses.12 by 12 Concrete SlabCubic yards of concrete for a 12 by 12 slab at common thicknesses.12 by 16 Concrete SlabCubic yards of concrete for a 12 by 16 slab at common thicknesses.14 by 14 Concrete SlabCubic yards of concrete for a 14 by 14 slab at common thicknesses.16 by 16 Concrete SlabCubic yards of concrete for a 16 by 16 slab at common thicknesses.16 by 20 Concrete SlabCubic yards of concrete for a 16 by 20 slab at common thicknesses.20 by 20 Concrete SlabCubic yards of concrete for a 20 by 20 slab at common thicknesses.20 by 24 Concrete SlabCubic yards of concrete for a 20 by 24 slab at common thicknesses.24 by 24 Concrete SlabCubic yards of concrete for a 24 by 24 slab at common thicknesses.30 by 40 Concrete SlabCubic yards of concrete for a 30 by 40 slab at common thicknesses.
Frequently asked questions
How thick should a slab be?
Four inches for patios and walks, five to six for driveways.
How many bags make a cubic yard?
About 45 bags of 80 pound concrete.