Roof Pitch Calculator

Enter rise and run to instantly see pitch ratio (X:12), angle in degrees, slope percentage, and pitch factor. Supports any two values — rise, run, or roof angle — for automatic conversion.

Calculate exact rafter length from run, rise, and overhang measurements. Shows plumb cut and seat cut angles (birdsmouth) for accurate framing and material ordering.

Get the roof pitch multiplier for converting plan area to actual roof area. Includes slope factor and hip/valley factor for accurate material takeoffs and area calculations.

Quick preset buttons for common pitches from 2:12 through 12:12. Visual pitch diagram redraws to your angle, and a reference table covers every pitch format roofers use.

Generate professional PDF reports and material lists for clients. Include your company name, project details, and itemized pitch calculations. Share via email or messaging apps.

Enter measurements in mm, cm, meters, feet, or inches (including fractions). Work in and convert between any building dimension, and get pitch in ratio, degrees, or DMS format.