Roof Pitch Calculator

Free roof pitch calculator — pitch ratio, angle, slope & rafter length

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Published on:

May 5, 2026

Pricing:

Roof Pitch Calculator application interface and features

About Roof Pitch Calculator

Roof Pitch Calculator is a free tool for homeowners, contractors, and roofers. Enter rise and run, a degree angle, or a pitch ratio (X:12) to instantly calculate pitch ratio, angle in degrees, slope percentage, rafter multiplier, and rafter length. Includes a live SVG roof diagram, a reference chart of 20+ common roof pitches, and a blog covering roofing guides. All calculations run in your browser — no account needed, no ads, no data collected, completely free.

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