Roof Pitch Calculator
Calculate roof pitch, angle, and rafter length for your roofing projects with our precise calculator
Roof Measurements
Your Roof Pitch Results
Pitch Ratio
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Angle
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Rafter Length
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Enter your roof pitch to see recommended materials and considerations.
Detailed Calculations
Your detailed roof calculations will appear here.
🏠 Common Roof Pitch Standards
| Pitch Ratio | Angle | Description | Common Uses |
|---|---|---|---|
| 1:12 | 4.76° | Very low slope | Flat roofs (minimum slope) |
| 3:12 | 14.04° | Low slope | Modern homes, sheds |
| 4:12 | 18.43° | Conventional slope | Most residential roofs |
| 6:12 | 26.57° | Moderate slope | Traditional homes |
| 8:12 | 33.69° | Steep slope | Snowy regions |
| 12:12 | 45° | Very steep | A-frame houses |
Note: Local building codes may require specific minimum pitches for certain materials.
🔨 Roofing Tips & Considerations
Material Suitability
Low slopes (1:12 to 3:12) require special materials like modified bitumen or EPDM rubber.
Snow Load
Steeper pitches (6:12+) help shed snow but require more materials and labor.
Wind Resistance
Moderate pitches (4:12 to 6:12) offer the best wind resistance for most areas.
Cost Factors
Steeper roofs cost 20-40% more due to increased materials, labor, and safety requirements.
Solar Panels
30-45° angles (7:12 to 12:12) are ideal for solar panel efficiency in most latitudes.
Measurement Tips
Always measure multiple points as roof pitches can vary across different sections.
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Note: This calculator provides estimates for planning purposes. Always consult with a professional architect or engineer before finalizing roof designs, as local building codes and conditions may affect requirements.