Kitchen Countertop Cost Calculator
Turn your counter run length and depth into square footage, multiply by the price per square foot you were quoted, and add edges and cutouts. Standard counters are about 25 inches deep — roughly 2.083 feet.
Calculator
Formula
area (sq ft) = run length (LF) × depth (ft)
total = area × price per sq ft + edges & cutouts
Countertops are sold by the installed square foot, so convert your linear run into square feet using the depth, then price it and add any edge or cutout upgrades.
Worked example
A straight run of 12 linear feet at the standard 2.083 ft depth, quoted at $60 per square foot, with no separate edge or cutout charges.
area = 12 × 2.083 = 25.0 sq ft.
total = 25.0 × $60 = $1,500.
An island or a peninsula is usually deeper than 25 inches, so measure it and raise the depth for that section.
Depth, waste and what the $/sq ft includes
Standard kitchen counters are 25 inches deep — about 2.083 feet — which covers a 24-inch base cabinet plus a small overhang. That is the default here, but islands, peninsulas and custom cabinets can be deeper, so measure your actual depth and enter it. The calculator multiplies your run length by that depth to get square footage, the unit stone and solid-surface fabricators price by.
The price per square foot you enter should be the fabricated-and-installed figure from your quote, not a raw slab price. Laminate, butcher block, quartz, granite and porcelain sit at very different price points, and the same material varies by color, thickness and region — which is exactly why the tool asks for your number instead of storing one that would go stale.
Put edge upgrades, sink and cooktop cutouts, and any matching backsplash in the edges & cutouts field. Fabricators also buy stone by the full slab, so a job a little over a slab boundary can jump in price even if your square footage barely changed — worth asking about when you compare quotes. The result here is a clean material-plus-add-ons estimate you confirm against the itemized bid.
Reference table
Common counter depths, so you can enter the right value in feet:
| Location | Typical depth | In feet |
|---|---|---|
| Standard base run (24 in cabinet + overhang) | 25 in | 2.083 ft |
| Cabinet box only, no overhang | 24 in | 2.000 ft |
| Island with a seating overhang | 36–42 in | 3.0–3.5 ft |
Depths are typical planning figures — measure your own counters and islands.
Frequently asked questions
How do I calculate countertop square footage?
Multiply the run length in linear feet by the depth in feet. A 12-foot run at the standard 2.083 ft depth is 25 square feet. For an L-shaped counter, add up each straight section.
What counter depth should I use?
About 2.083 feet (25 inches) for a standard base run. Islands and peninsulas with seating overhangs are deeper — measure them and enter the larger depth for that section.
Does the price include fabrication and install?
It should. Enter the fabricated-and-installed price per square foot from your quote, then use the edges & cutouts field for edge upgrades, sink cutouts and backsplash.
Why is the material not pre-loaded?
Because material prices change and vary by color, thickness and region. Entering your own $/sq ft keeps the estimate accurate for laminate, quartz, granite or anything else.