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Roof Pitch Calculator
Roof pitch in X/12 format, angle in degrees, percent grade. Shingle suitability included.
Updated April 2026
Roof Pitch Calculator
Convert between X-in-12 pitch, angle in degrees, and percent grade.
Pitch6/12
Angle26.57°
Percent grade50%
Rafter length factor×1.118 per ft of run
CategoryConventional
Roofing material: Architectural asphalt shingles acceptable. Standard underlayment is fine.
Categories: flat < 3/12 • low 3–4/12 • conventional 5–9/12 • steep > 9/12. Architectural shingles require a minimum 4/12 pitch per most manufacturer warranties.
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What it does
Enter rise and run (or angle) — get X/12 notation, degrees, percent grade, and whether architectural shingles work on that pitch.
Runs entirely in your browser — no upload, no account, no watermark. For more tools in this category see the full tools index.
Embed this tool on your siteShow snippetHide
Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.
<iframe src="https://freetoolarena.com/embed/roof-pitch-calculator" width="100%" height="720" frameborder="0" loading="lazy" title="Roof Pitch Calculator" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>How to use it
- Enter rise and run.
- Or enter angle.
- Read pitch + shingle fit.
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