Turn a house footprint into roof surface area. Add the pitch and overhang to get square footage and roofing squares for shingle orders.
Converts the flat footprint to true sloped surface with the pitch factor.
Roofers order by the square (100 sq ft) — this does that math.
Adds 15% for valleys, hips, and cut shingles.
All calculations run locally in your browser.
Cover your roof the first time.