How To Determine Square Footage For Granite Countertops. And the idea here is pretty straightforward. Standard width of countertop = 25.5 inches.
30 square feet of granite. Measure each countertop section and record the length and depth dimensions of the sections (in inches, rounded to the nearest inch). To calculate square footage of countertops.
Standard height of splash = 4 inches.
Please remember to include the backsplash in your calculation to get an accurate estimate. To calculate the total square footage (after placing seams) you will need to follow this formula: L x w = a (in square feet). This yields a product called the area, which is expressed in square feet (or square inches if you are.