Countertop Calculator
Estimate countertop surface area, slab quantity, linear run, backsplash area and installed-material cost for counters and an island.
Default project preview
47.9 ft²
Base surface area
43.5 ft²
Full slabs
1
Main linear run
12 ft
Backsplash area
4 ft²
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Countertop area = run length × depth + island area. Order area = surface area × fabrication allowance. Slabs = round up (order area ÷ usable slab coverage).
FAQ
Countertop Calculator questions
Should sink cutouts be subtracted from slab area?+
Usually no. The removed material still comes from the purchased slab, and fabrication adds a separate cutout charge.
Why is usable slab coverage smaller than slab dimensions?+
Edge defects, seams, pattern direction and fabrication margins reduce usable material.
Does this include edge profiles?+
No. Edge treatment is commonly priced separately by linear length.