How To Measure Square Feet For Granite Countertops. Add the 3,172 and 488 together for the total in square inches (3172 + 488 = 3660). If they prefer square feet, just divide that number by 12.
Measure each countertop section and record the length and depth dimensions of the sections (in inches, rounded to the nearest inch). Multiply the height of the backsplash by the length of the countertop. Area = length × width
Measure the width of your countertop.
Important considerations when measuring for granite countertops. Use a straightedge to draw a line to mark off the edges of each box with a pencil or a piece of chalk. Add the two totals together to find total square footage: This height ensures there are no obstacles that will get in the way such as power outlets