Roof Pitch Calculator
Calculate roof pitch, slope, angle, and rafter length. Convert between pitch ratios, degrees, and percentages for roofing projects.
Step 1: Roof Measurements
Understanding Roof Pitch
Roof pitch is expressed as a ratio of vertical rise to horizontal run. A 6:12 pitch means 6 inches of rise for every 12 inches of run.
Step 2: Roof Specifications
Common Roof Pitches
Low slope: 2:12-4:12 | Conventional: 4:12-9:12 | Steep slope: 9:12-20:12. Steeper pitches shed water better but require more materials.
Roof Pitch Visualization
Rise: 6 in
Run: 12 ft
26.57°
Roof Pitch Calculation Results
Summary
Roof Type Comparison
Rafter Calculations
Roof Pitch Calculation
6:12
Angle: 26.57° | Slope: 50%
Pitch Ratio
6:12
Angle
26.57°
Percentage Slope
50%
Roof Classification
Conventional
Roof Type Comparison
| Roof Type | Typical Pitch | Rafter Length | Surface Area | Best For |
|---|
Rafter & Area Calculations
Rafter Length
13.42 ft
Roof Surface Area
402.5 sq ft
Roofing Squares
4.03
Roof Volume
605 cu ft
Roof Pitch Formula
Pitch = Rise ÷ Run | Angle = arctan(Rise/Run) | Rafter = √(Rise² + Run²)
Roof pitch calculations use basic trigonometry. The pitch ratio compares vertical rise to horizontal run, while the angle is calculated using the arctangent function.
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