Countertop Square Footage Calculator
Measure kitchen counters, islands, vanities, backsplash, waste, slab needs, and total square feet in a simple way.
How Do You Find Countertop Square Feet?
First, measure length and depth in inches. Next, multiply them. Then divide by 144. Also, add each countertop section together for the final total.
Measure Your Countertop Sq Ft
Choose a layout, add measurements, and get a clean square footage estimate. Advanced options stay hidden so the tool feels simple.
Advanced Options
This tool gives a planning estimate only. Also, a fabricator may measure in person before ordering stone, quartz, laminate, or solid surface.
Measurement Breakdown
What It Means
Measure Fast, Then Check The Total
Countertop Square Footage Formula
The basic formula is simple. Multiply length by depth in inches. Then divide the answer by 144 because one square foot has 144 square inches.
For example, a 108 inch long counter with a 25.5 inch depth is about 19.13 square feet. Also, each extra section should be measured the same way.
Length × Depth ÷ 144 = Sq Ft
Countertop Square Footage By Layout
Different layouts need different rows. However, the same length and depth formula still works.
Straight Counter
Use one row. Also, choose 25.5 inches as a common kitchen depth if you do not know the depth yet.
L Shaped Counter
Use two rows. Next, measure each side. Then add both square foot numbers together.
Kitchen Island
Use one row with a deeper size. For example, many islands are 36 to 42 inches deep.
Bathroom Vanity
Use one row. In many homes, a vanity top is about 22.5 inches deep.
Helpful Countertop Measuring Notes
How To Measure Countertops In Inches
First, use a tape measure. Next, write every number in inches. This keeps the math easy because the calculator divides by 144 for you.
Standard Countertop Depth
A common kitchen counter depth is about 25.5 inches. However, islands, bars, and vanities may use a different depth.
Should You Include Backsplash?
Add backsplash when you want a closer material estimate. Also, use 4 inches as a common short backsplash height.
Should You Subtract Sink Cutouts?
For a quick estimate, do not subtract the sink hole. The fabricator still cuts the slab before making the sink opening.
How Much Waste Should You Add?
Many people add 5% to 10% waste. However, complex layouts may need more because cuts and seams can change the final need.
Countertop Slab Size Guide
A slab size can change by material and supplier. So, use the slab field as a rough planning number only.
Countertop Square Footage And Cost
Square footage helps you ask for a quote. Still, the final price can change by material, edge style, seams, sink cutout, and local labor.
Material Type
Quartz, granite, laminate, marble, and solid surface can have very different prices.
Cutouts
Sink and cooktop cutouts may add labor. So, mark them on your layout sketch.
Edge Style
Simple edges often cost less. However, custom edges can raise the total price.
Install Labor
Delivery, removal, seams, and install work can change the final quote.
Common Countertop Measuring Mistakes
Measuring In Feet
Use inches first. Then the calculator will turn the number into square feet.
Skipping Small Sections
Small returns and bars still count. Also, every section should get its own row.
Forgetting Overhang
Include the full front edge. Otherwise, your measurement may come out too small.
No Waste Added
Waste helps cover cuts. Therefore, add waste when you plan material.
Abul Bashar Suman
“Good project numbers start with clear measurements.”
I build simple tools that help people get quick answers before they ask for a quote. This countertop calculator keeps the first step easy, so users can measure without feeling stuck.
Countertop Square Footage Calculator FAQ
Try The Countertop Calculator Again
Change the layout, add another section, or adjust waste to compare your countertop square footage.