Roof Pitch Calculator
Determine roof pitch expressed as rise/run, degrees, and percentage. Calculate the pitch multiplier for estimating actual roof area from the footprint.
Inputs
Distance from wall to ridge (half the building width)
Results
Pitch
6/12
Angle
26.6 degrees
Multiplier
1.118
Category
Conventional
Rafter Length: 16.8 ft
Ridge Height: 7.5 ft above the wall plate
Slope: 50.0% grade
Common Roof Pitches Reference
| Pitch | Angle | Multiplier | Category |
|---|---|---|---|
| 2/12 | 9.5 | 1.014 | Low Slope |
| 3/12 | 14.0 | 1.031 | Low Slope |
| 4/12 | 18.4 | 1.054 | Conventional |
| 5/12 | 22.6 | 1.083 | Conventional |
| 6/12 | 26.6 | 1.118 | Conventional |
| 7/12 | 30.3 | 1.158 | Conventional |
| 8/12 | 33.7 | 1.202 | Conventional |
| 9/12 | 36.9 | 1.250 | Steep |
| 10/12 | 39.8 | 1.302 | Steep |
| 12/12 | 45.0 | 1.414 | Steep |