Calculate roof slope, angle, and rafter length
Enter the rise and run to calculate your roof pitch. Rise is the vertical measurement, and run is the horizontal measurement (typically 12 inches for standard pitch notation).
Common Roof Pitches:
• 4:12 (Low slope) - Common for sheds, porches
• 6:12 (Standard) - Most residential roofs
• 8:12 (Medium) - Traditional homes
• 12:12 (Steep) - Victorian, Gothic styles
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| Pitch | Angle | Slope % | Type |
|---|---|---|---|
| 4:12 | 18.4° | 33% | Low |
| 5:12 | 22.6° | 42% | Low-Med |
| 6:12 | 26.6° | 50% | Standard |
| 7:12 | 30.3° | 58% | Med |
| 8:12 | 33.7° | 67% | Med-High |
| 9:12 | 36.9° | 75% | High |
| 10:12 | 39.8° | 83% | High |
| 12:12 | 45.0° | 100% | Steep |