Roof Area Calculator

Calculate actual roof surface area from building footprint and roof pitch.

Building Length (m)

Building Width (m)

Roof Pitch (x:12)

Roof pitch explained

A 4:12 pitch means the roof rises 4 inches for every 12 inches of horizontal run. The pitch factor is âˆš(1 + (rise/run)Â²), which converts footprint area to actual sloped surface area.