What is the calculation used to determine the number of squares for shingles needed?

The calculation for determining the number of squares of shingles needed is based on the total roof area, with one square representing a coverage area of 100 square feet. Therefore, dividing the total roof area by 100 allows you to find out how many squares of shingles are required to cover that area effectively. This method is standard in the roofing industry and provides a straightforward way to calculate the material needed for a roofing project. Understanding this concept is essential for accurate estimations when purchasing shingles for a roofing job, ensuring the contractor has enough material while minimizing waste.