Concrete Countertop Calculator

Estimate concrete mix, reinforcement, mold materials, and sealer for casting decorative concrete countertops.

Length per piece (inches)

Width / depth (inches)

Thickness (inches)

Mix type (1-2)

Number of pieces

Tab to move between fields

Total material cost ($)

$117.18

Cost per sq ft ($)$6.76

Total area (sq ft)17.33

Portland cement (lbs)59.6

Sand (lbs)119.2

Pea gravel (lbs)119.2

AR glass fiber (lbs)0

Water (quarts)7.2

Rebar (linear ft)20.3

Food-safe sealer (quarts)0.7

Weight per piece (lbs)283

How to Use This Calculator

Enter the length and width (depth) of each countertop piece in inches and set the thickness (standard is 1.5 in).
Choose mix type: 1 for standard wet-cast (heavier, gravel + rebar) or 2 for GFRC (lighter glass-fiber-reinforced).
Enter the number of pieces to cast — each section is calculated separately.
Review Portland Cement (lbs), Sand (lbs), and Water (quarts) to batch your mix accurately.
Note Weight per Piece (lbs) to plan safe lifting and verify cabinet load capacity.
Use Total Material Cost and Cost per Sq Ft to compare DIY versus buying pre-cast countertops.

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