Hip Roof Framing Calculator

The most complete hip roof framing calculator for iPhone and iPad. Designed for professional carpenters, roofers, contractors, and serious DIY builders who need precise measurements on the job site.

Enter your building dimensions, roof angle, and lumber sizes — get every measurement you need to frame a hip roof, instantly.

COMPLETE CALCULATIONS • Common, hip, and jack rafter lengths with overhang • All plumb cuts, side cuts, and backing angles • Birdsmouth seat and plumb dimensions • Ridge length and king common calculations • Jack rafter shortening and spacing • Sheathing sheets, shingle bundles, and fascia quantities • Roof area, volume, and material estimates • Frieze block and purlin lip angles • Batten spacing and linear footage

14 INTERACTIVE DIAGRAMS • Roof plan view with color-coded rafters • Common and hip rafter side profiles with full dimensions • Cross-section profile showing wall, ridge, and rise • Angle template protractor for all cut angles • Joint connection detail • 3D jack and hip plumb/side cut perspectives • Hip backing angle cross-section • Individual jack rafter diagrams with measurements • Running layout plan with ridge, wall, and hip marks • Sheathing cut angle diagram • Flat roof segment layout with areas

BUILT FOR THE JOB SITE • Device inclinometer — place your phone on a rafter or roof surface to measure the angle directly, then feed it into the calculator with one tap • Pinch-to-zoom on every diagram for inspecting fine details • Imperial and metric input modes — switch instantly • Output in feet, inches, or millimeters • Fraction precision from 1/8 to 1/64 inch

SAVE & SHARE • Save unlimited named presets for different projects • Export a comprehensive PDF report with all inputs, dimensions, materials, angles, and rafter schedules • Share reports with your crew or clients

ACCURACY YOU CAN TRUST • Calculation engine verified against industry-standard reference values • Every angle, length, and quantity computed from first principles using precise trigonometry • Internal precision to 1/32 of an inch

Supports equal and exact rafter spacing modes, drop and chamfer hip adjustment methods, eave overhang calculations, porch extension sub-calculator, and roof segment area breakdowns.

Whether you are framing a new construction, estimating materials for a bid, or planning a renovation — this is the only roof framing tool you need on your phone.