How the roofing calculator works
The calculator multiplies building footprint by a roof pitch factor. A 6 in 12 pitch, for example, has a larger surface area than a flat plan view. The result is divided by 100 to produce roofing squares, then converted to bundles and rolls.
Best keyword fit
Targets roofing calculator, roof pitch calculator, roofing square calculator, shingle calculator and roof material calculator.
What is a square?
A roofing square is 100 square feet of roof surface. Suppliers commonly price shingles and roof materials by the square.
How much waste?
Simple gable roofs may use around 10 percent. Hips, valleys, dormers and steep cut-up roofs usually need more.