Roof Pitch Converter

Roofers and suppliers mix degrees, rise-over-run (e.g. 4:12) and percent slope. Convert between them and see the surface-area factor.

Input type

Pitch (degrees)

Minimum pitches depend on profile and manufacturer. Installing below recommended pitch risks leaks and warranty issues.

Planning a roof in Brisbane or on the Coast?

Use the calculators for ballparks, then get a site measure for materials that fit your home.