Countertop Weight Calculator
Estimate countertop weight, net surface area, linear load and material allowance from length, depth, thickness, cutouts and density.
Default project preview
302 lb
Gross surface area
21.3 ft²
Net surface area
17.3 ft²
Load per length
30.2 lb/ft
Fabrication area
18.1 ft²
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Input and output guide
What each value means
The labels and units below are part of this calculator’s visible methodology. Replace every default with measurements or product data from the actual project.
Countertop length
Enter this project assumption in ft. The current imperial default is 10 ft.
Countertop depth
Enter this project assumption in in. The current imperial default is 25.5 in.
Material thickness
Enter this project assumption in in. The current imperial default is 1.25 in.
Sink and appliance cutouts
Enter this project assumption in ft². The current imperial default is 4 ft². Minimum: 0.
Countertop density
Enter this project assumption in lb/ft³. The current imperial default is 168 lb/ft³.
Fabrication allowance
Enter this project assumption in %. The current imperial default is 5 %. Minimum: 0. Maximum: 30.
Price per surface area
Enter this project assumption in per ft². The current imperial default is 65 per ft². Minimum: 0.
How to read the outputs
Gross surface area
before cutouts. Default preview: 21.3 ft².
Net surface area
installed material. Default preview: 17.3 ft².
Load per length
average along the run. Default preview: 30.2 lb/ft.
Fabrication area
including allowance. Default preview: 18.1 ft².
Material allowance
fabrication area × entered rate. Default preview: $1,177.31.
Density assumption
editable material value. Default preview: 168 lb/ft³.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Gross area = length × depth. Net area subtracts cutouts. Volume = net area × thickness, and installed weight = volume × density. Fabrication cost uses net area plus allowance.
FAQ
Countertop Weight Calculator questions
Are sink cutouts subtracted from countertop weight?+
Yes, the entered cutout area reduces the installed material volume.
Do built-up edges add weight?+
Yes. Laminated edges, backsplashes and seams should be estimated separately or added through a higher allowance.
Can this verify cabinet support?+
No. Support design depends on cabinet construction, spans, overhangs, seams and material requirements.