Roof Size Calculator

The Roof Size Calculator is a practical estimation tool designed to help homeowners, contractors, and roofing professionals accurately determine the total roof size required for material planning and project estimates.

Roof Size Calculation Method

The calculation process begins by determining the building footprint area, calculated by multiplying the building length by its width. Since roof surfaces are larger than the building footprint due to slope, a roof pitch factor is then applied. This factor adjusts the footprint area to reflect the actual roof surface area based on the selected pitch.

Finally, the calculator converts the total roof area into roofing squares, where one roofing square equals 100 square feet. This method provides accurate, industry-standard estimates that help users plan material quantities, compare contractor quotes, and better understand the scope of their roofing project.