Gable Roof Framing Calculator

Plan, calculate, and estimate your gable roof project with precision — right from your iPhone or iPad. Gable Roof Framing Calculator is a professional-grade tool built for carpenters, builders, roofers, and DIY homeowners. Enter your building dimensions and get instant, accurate results for every aspect of your gable roof framing. FULL ROOF CALCULATIONS • Building and roof dimensions with eave and gable overhangs • Overall rise, ridge top, and ridge bottom heights • Rafter spacing with equal or exact distribution modes • Plumb cut angles and setback measurements • Roof area, gable area, and volume calculations • Running measurements for ridge and wall layout INTERACTIVE DIAGRAMS • Roof Plan — top-down view with rafter layout • Roof Profile — cross-section showing heights and angles • Rafter Detail — individual rafter with birdsmouth and plumb cuts • Pinch-to-zoom for fine detail inspection MATERIALS & COST ESTIMATOR • Ridge and rafter quantity with exact dimensions • Shingle bundles, starter course, squares, and ridge cap • Enter your unit prices for lumber, roofing, and battens • Adjustable waste percentage • Instant cost breakdown with line-item detail and grand total BONUS TOOLS • Pitch / Angle Converter — convert between pitch, degrees, and slope % • Board Feet Calculator — quick lumber volume calculation • Plywood / Sheathing Estimator — sheets needed for your roof area • Hip / Valley Rafter Calculator — length, angle, and backing angle BUILT FOR THE JOBSITE • Supports Metric (mm) and Imperial (feet–inches–fractions) • Device angle measurement — place your phone on any slope to capture the roof pitch instantly • Standard lumber size presets (2×4 through 2×12 and common metric sizes) • Export a complete multi-page PDF report with results, diagrams, and cost estimates • Share results via text, email, or any app METRIC & IMPERIAL Switch between millimeter-based metric input and a purpose-built feet/inches/fractions picker designed for fast, error-free entry on the jobsite. Every calculation adapts to your chosen unit system automatically. Whether you are a professional framer pricing a job, a contractor preparing a bid, or a homeowner planning a garage build — Gable Roof Framing Calculator gives you the numbers you need. Fast, accurate, and fully offline. Download now and take the guesswork out of your next roof.