18 ft run at 25.5 in depth
- Top area
- 38.25 ft2
- Backsplash area
- 6 ft2
- Estimated cost
- $3,320.63
Slab layout, seams, edge profile, overhangs, sink type, backsplashes, templates, fabrication, and installation rules can change the final quote.
Countertop Calculator
Use this free countertop calculator to estimate countertop area from run length, depth, backsplash, cutouts, waste, and optional price per square foot.
Research-backed assumptions Formula steps Examples included Private in-browser use
Formula steps
- Convert countertop depth from inches to feet and multiply by length.
- Add backsplash area and subtract cutouts if needed.
- Add waste and multiply by price per square foot when entered.
How to use the countertop calculator
- Enter countertop run length, depth, backsplash dimensions, cutouts, waste, and optional price.
- Press Estimate countertop to see adjusted square footage and optional cost.
- Use cutouts only as rough material-area subtraction because fabricators may still charge cutout labor.
- Slab layout, seams, edges, overhangs, templates, delivery, and installation can change quotes.
Common uses
Estimate countertop square footage for a kitchen or vanity.
Add backsplash area when the backsplash uses the same material.
Subtract known cutout area for rough material planning.
Compare rough cost at different material prices.
Examples
About 44.28 ft2
Vanity area estimate
Top-only square feet
Frequently asked questions
Plain-language answers about when to use the tool, what it does with your inputs, what to double-check, and how privacy works.
When should I use the Countertop Calculator?
Use it when your task matches one of these common needs: Estimate countertop square footage for a kitchen or vanity. Add backsplash area when the backsplash uses the same material. It works best when you already know the values, dates, units, or settings the page asks for.
What is the Countertop Calculator doing with my inputs?
In plain language: The calculator converts depth and backsplash height to feet, finds top area plus backsplash area, subtracts cutouts, adds waste, and multiplies by price when entered. The examples on the page are there so you can compare your inputs with a filled-out calculation before copying the answer.
What do the main Countertop Calculator inputs mean?
Length: the total countertop run length in feet. Depth: front-to-back countertop depth in inches. Backsplash: optional backsplash length and height added to the square footage. Cutouts: sink or cooktop areas subtracted before waste when you know them.
How should I read the Countertop Calculator answer?
Read the headline estimate first, then check the material, waste, coverage, and unit lines. For project tools, the supporting lines are often the difference between a rough idea and a list you can actually shop from.
What should I double-check before trusting the answer?
Real quotes can change for slab layout, seams, sink type, cutouts, edge profile, overhangs, templating, fabrication, install labor, and delivery. Also check that you used the right unit, date, scale, or mode because small input changes can change the result.
Should I subtract sink and cooktop cutouts?
Only subtract them for a rough material area check. Many fabricators still charge for cutout work, templates, and the slab waste around the opening.
Why can a countertop quote be higher than the square-foot estimate?
Countertops often include edge profiles, seams, corner layouts, backsplash pieces, sink cutouts, delivery, labor, and minimum slab purchase rules.
Does the site save what I enter?
No. The calculator runs in your browser tab. Your recent answers stay only on the page while you use it, and they are not sent to a server.
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