Roof Pitch

Pitch as fraction, degrees, and percent.

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Formula and source

Pitch = rise / run, expressed as N/12 (carpenter form), degrees (atan2), and percent. Conversions for fall over distance.

Classical geometry; IRC 2021 §R905 references for slope minimums by roof-cover class.

Audience

This tile is built for carpentry and the adjacent professions in the Carpentry and Construction group. The interactive calculator runs entirely in your browser. No account, no fee, no advertising, no tracking.

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Posture

Rough Logic answers the math question the working professional asks on the job. The site is a calm, fast, ad-free, account-free, ever-free reference. It does not interpret code. It does not replace the licensed professional. It does not store your inputs. The Authority Having Jurisdiction governs all installations and inspections.