Roof Pitch Calculator

Convert between rise/run, degrees, ratio and percentage for roof pitch.

Estimate only — not a substitute for a licensed tradesperson, a certified engineer, or sign-off from your local building surveyor. Verify against current standards and site conditions before ordering materials or starting work.

Result

Pitch: 22.62deg
Pitch: 41.67%
Ratio (rise : 12 run): 5in 12

What this is based on

Geometry - converting between pitch expressed as degrees, ratio and percentage. MINIMUM pitch for a given roof cladding is set by the cladding manufacturer and AS 1562, not by this conversion.

We cite the clause and link to the publisher so you can read the source yourself. We do not reproduce the text or tables of the NCC or of any Australian Standard.