Roof Pitch Calculator is a fast, professional tool for roofers, carpenters, framers, builders, and DIYers. Enter any two values — rise, run, or roof angle — and instantly calculate roof pitch, slope percentage, rafter length, and roof dimensions. No internet required. No ads. No subscriptions. Just results. DESIGNED FOR THE JOBSITE Large touch targets work with gloved hands. The one-screen layout means no digging through tabs or menus. Enter measurements exactly how you read them from a tape measure, including fractional inches like 7 3/8 or 5 1/2. Results display in carpenter-friendly pitch ratios such as 5 3/4 : 12. PITCH CHEAT SHEET Quick reference table of common roof pitches including: • Roof angle • Slope percentage • Rafter multiplier Perfect for rafter layout, framing calculations, and quick roof pitch checks. US AND CANADA BUILDING CODES Toggle between United States and Canadian building codes: • IRC 2024 • IBC 2024 • NBC 2020 Part 9 • NBC 2020 Part 5 The app automatically adjusts code references, roofing materials, and minimum pitch requirements based on your selection. ROOFING MATERIAL COMPLIANCE Select a roofing material and the app warns you if your roof pitch falls below the minimum code requirement. Supported materials include: • Asphalt shingles • Standing seam metal • Exposed fastener metal • Clay and concrete tile • Wood shakes • Slate • Built-up roofing Commercial mode also includes: • TPO • EPDM • PVC membranes Material notes explain special requirements such as underlayment rules for low-slope asphalt shingles. PITCH, DIMENSIONS, AND MATERIALS — ALL ON ONE SCREEN • Enter rise + run, rise + angle, or run + angle • Preset buttons for common pitches from 2:12 through 12:12 • Sliders for quick visual adjustment • Span and rafter length auto-calculate from pitch • Animated roof diagram updates in real time Flat roofs (0:12) are supported. MATERIAL ESTIMATES (GABLE ROOF) When pitch and building dimensions are entered the app calculates: • Total roof area • Roofing squares • Bundle count • Waste allowance • Total bundles required Settings for bundles per square and waste percentage are saved between sessions, making repeat estimates faster. MEASURE ROOF ANGLE WITH YOUR PHONE Use the built-in device level as a roof angle finder. Place your phone on a rafter or roofline and capture the angle directly into the calculator. IMPERIAL AND METRIC Switch between feet and inches or metric units at any time. Fractional inch input allows measurements like 7 3/8 or 5 1/2. Internal calculations always maintain full precision. SAVE, COPY, AND REVIEW • Copy all results to your clipboard in one tap • Save calculations with custom titles • History stores up to 50 calculations Restore any saved calculation instantly, including unit system, building code, and material settings. RESULTS AT A GLANCE • Roof pitch ratio • Roof angle in degrees • Slope percentage • Rafter factor and multiplier • Rafter length • Roof height Everything needed for roof framing, estimating, and planning. PRIVACY FIRST Roof Pitch Calculator works 100% offline. No analytics No tracking No accounts No data collection Your calculations stay on your device. BUILT FOR PROFESSIONALS Whether you are estimating roofing materials, checking pitch during framing, reviewing building plans, or measuring a roof on-site, Roof Pitch Calculator gives you fast answers without unnecessary complexity. DISCLAIMER For estimation and reference only. Estimates assume a symmetrical gable roof. Always verify measurements, material quantities, and building code requirements before construction.