Gable Roof Calculator
Calculate gable roof area, materials, and cost based on roof dimensions, pitch, and material prices. Estimate rafter length, roof area, and construction costs for your project.
Step 1: Roof Dimensions
Understanding Roof Pitch
Roof pitch is expressed as a ratio of vertical rise to horizontal run. A 6:12 pitch means the roof rises 6 inches for every 12 inches of horizontal distance. Steeper pitches require more materials and labor.
Step 2: Material & Cost
About Waste Factor
The waste factor accounts for cutting losses, damaged materials, and trimming. Higher waste factors are needed for complex roof designs with many hips, valleys, or dormers.
Gable Roof Calculation Results
Total Roof Cost Estimate
Roof Diagram
Roofing Material Comparison
| Material Type | Cost per sq ft | Lifespan | Total Cost | Weight (per sq ft) |
|---|
Roof Cost Analysis
Roof Calculation Formulas
Rafter Length = √(Run² + Rise²)
Roof area is calculated based on rafter length, roof length, and overhang. Material costs include waste factor and labor. Ridge height = (Run × Pitch Ratio) / 12.
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