To determine surface area, measure the length and width of each countertop segment in inches and divide by 144 to convert to square feet. Add the segments together. It is standard to add a waste percentage, typically 10-15%, to account for cutting, seams, and grain matching. Professional installers provide final templating, which is the industry standard for precise measurements required for granite or quartz fabrication, ensuring that all corners, appliance cutouts, and backsplash requirements are included.

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