Free Roofing Calculator
Roof Area Calculator
Estimate the approximate surface area of a pitched roof using the building footprint, roof pitch and eave overhang.
Roof Area Calculator
ft²
26.6°
ft
Calculate your roof area
Enter the approximate building footprint, roof pitch and eave overhang.
Why roof area is larger than floor area
Roof surface area increases as roof pitch increases. Eave overhangs also extend beyond the exterior walls, which can make the actual roofing area larger than the building footprint.
What is a roofing square?
Roofing contractors commonly use squares when estimating materials. One roofing square equals 100 square feet of roof surface.
Estimating a replacement project?
Once you know your approximate roof area, use the RooferNet replacement cost calculator to estimate a preliminary project budget.
Roof Replacement Calculator