Roof Pitch Gauge - Gabled

Measure roof pitch with phone sensors or camera. Calculate materials & rafters.

Measure roof pitch instantly using your phone's built-in sensors or camera — then calculate the materials and rafter dimensions you need for any roofing project.

◆ TWO WAYS TO MEASURE

• Tilt Sensor — Place your phone on the roof surface for a direct reading. A precision sensor filter (gyroscope + accelerometer fusion) delivers stable, accurate results.
• Camera Sight — Stand on the ground and aim at the roofline. On-screen guides help you align while sensors compute the angle automatically.

◆ BUILT-IN BUBBLE LEVEL

An animated circular spirit level with a color-coded stability indicator (amber → green → blue) helps you confirm your reading is locked and accurate.

◆ MATERIALS CALCULATOR

Enter your pitch and roof dimensions to get a complete materials list:

• Squares, bundles, and underlayment rolls
• Starter strip, ridge cap, and drip edge
• Nails and optional ice & water shield
• 9 roofing materials — 3-Tab Shingles, Architectural Shingles, Standing Seam Metal, Corrugated Metal, Wood Shakes, Clay Tile, Concrete Tile, Slate, and Roll Roofing
• Minimum pitch validation for each material type

◆ RAFTER CALCULATOR (Pro)

Compute everything you need for framing:

• Common rafter length, run, and rise
• Overhang tail length
• Plumb and seat cut angles
• Framing square reference marks
• Ridge height
• Hip/valley rafters with compound angles

◆ REFERENCE TABLES

• Pitch Table — 47 entries from 0.5:12 to 24:12 with degrees, slope %, multiplier, and hip/valley factor. Tap any row to use it in the calculator.
• Span Tables (Pro) — IRC R802.4 rafter spans for 2×4 through 2×12, SPF #2 and Douglas Fir #2, at 16" and 24" OC.
• Unit Converter — Feet & inches ↔ decimal feet/meters, degrees ↔ pitch, slope % ↔ pitch, sq ft ↔ roofing squares.

◆ MEASUREMENT HISTORY

Save up to 50 measurements with timestamps, mode (tilt or camera), and custom labels. Copy or share your history as formatted text (Pro).

◆ FREE VS PRO

Free includes asphalt shingle calculations, 1 roof section, and 10 saved measurements. Upgrade to Pro for all 9 material types, unlimited roof sections, cost estimates, rafter calculator, span tables, history export, and customizable defaults.

◆ SUBSCRIPTION OPTIONS

• Monthly, Annual (with savings), or Lifetime
• Free trial available where offered

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