How to use the roof pitch calculator
- Rise: Vertical rise using the same unit as the run.
- Run: Horizontal run from wall to ridge.
- Select the button and review the result.
Worked example
A 6 rise over 12 run is a 6:12 pitch, 50% slope, and about 26.57° angle.
Method and limitations
Angle = arctan(rise ÷ run).
Geometry estimate only. Roofing work requires safe measurement and local professional guidance.
Common questions
Why might another result be different?
Inputs, rounding, policies, rates, and assumptions can differ. Compare like-for-like values and use current official information when a rate or rule can change.
Does NidXee save my entries?
No. The calculation runs in your browser. Reloading or closing the page may clear it.