How To Calculate Square Feet Of A Countertop

Calculating the square footage of a countertop is a crucial step in planning and budgeting for a kitchen or bathroom remodel. Whether you're a homeowner DIYing the project or a contractor estimating materials, accurate measurements ensure you order the correct amount of countertop material and avoid costly mistakes.

Step 1: Determine the Shape of the Countertop

The shape of your countertop will determine the calculation method. Common countertop shapes include rectangles, L-shapes, U-shapes, and islands. For irregular shapes, break them down into smaller rectangles or triangles.

Step 2: Measure the Length and Width

Using a measuring tape, determine the length and width of each section of the countertop. For rectangular and L-shaped tops, measure the longest and widest points. For U-shapes and islands, measure each leg separately.

Step 3: Multiply Length by Width

For each section, multiply the length and width to get the area in square feet. For example, a 6-foot by 4-foot countertop section has an area of 24 square feet (6 x 4 = 24).

Step 4: Add the Areas Together

If the countertop has multiple sections, add the areas of all the sections together to get the total square footage. For example, if the countertop has a 24-square-foot section and an 18-square-foot section, the total area is 42 square feet (24 + 18 = 42).

Special Considerations

Overhangs and Backsplashes: If the countertop has overhangs or a backsplash, add the additional area to your calculations. Measure the length and depth of the overhang and multiply them to get the square footage.

Cutouts: If there are any cutouts for sinks, cooktops, or other appliances, subtract the area of the cutout from the total square footage. Measure the length and width of the cutout and multiply them to get the area.

Edge Profiles: Some countertops have decorative edge profiles, such as bullnose or ogee. These profiles can increase the overall square footage slightly. Consult the supplier for the specific profile's measurements.

Example Calculation

Let's say you have an L-shaped countertop with a 6-foot by 4-foot section and a 5-foot by 3-foot section. You also have a 3-foot by 1-foot overhang and a 2-foot by 1-foot sink cutout.

Section 1:

6ft x 4ft = 24 sq. ft.

Section 2:

5ft x 3ft = 15 sq. ft.

Overhang:

3ft x 1ft = 3 sq. ft.

Cutout:

2ft x 1ft = 2 sq. ft.

Total Square Footage:

24 + 15 + 3 - 2 = 40 sq. ft.

Tips

Use a measuring tape with inch markings for precision. Sketch the countertop on paper and mark the measurements to visualize the layout. Include any cutouts or overhangs in your calculations. Round up the final square footage measurement to account for any small measurement errors. Consult with a countertop supplier or professional for assistance if needed.