Roof Pitch to Degrees Guide
Why Pitch Conversion Matters
A roof pitch to degrees calculator helps builders read slope data. Many plans show pitch as rise over run. Notes often say 6 in 12, 4 in 12, or 10 in 12. Field crews may need degrees for saw settings, layout checks, drainage review, and reports.
What Roof Pitch Means
Roof pitch describes vertical rise for a fixed horizontal run. Degrees describe the same slope as an angle from a level line. Mistakes can affect rafter length, surface area, flashing cuts, and material estimates.
How This Calculator Works
This calculator uses rise and run to find the tangent of the roof angle. It then applies the arctangent function and converts radians into degrees. The same ratio also produces slope percent, roof factor, total rise, and sloped roof area.
Material Planning Uses
Roof factor is useful for estimating sheathing, underlayment, shingles, and panel coverage. It compares the sloped surface length to the flat horizontal run. A steep roof has a higher factor. That means more surface material is required than the plan view suggests.
Input Choices
You can use the rise per 12 input for standard trade pitch notation. You can also use custom rise and run when plans use another base. Keep both values in the same unit. The angle will stay correct because the ratio is unitless.
Layout Checks
The layout fields add practical planning values. Enter the horizontal run from wall plate to ridge. Add the roof length along the ridge. Include overhang when it belongs in the rafter surface. Choose one roof side for a shed roof or two roof sides for a gable roof. Add waste for cuts, laps, damaged pieces, and ordering margin.
Important Limits
The results are estimates, not engineering approval. Real roofs may include hips, valleys, dormers, crickets, parapets, and code limits. Always verify structural spans, local roof covering rules, and manufacturer installation limits before ordering.
Best Practice
For best results, measure carefully. Use the same unit throughout the form. Round outputs only after the final result. Save the CSV for spreadsheets. Use the PDF button for job notes, client records, or documentation. Recheck critical numbers when roof framing changes during design or construction.