Roof Pitch Chart and Reference Table
Quickly convert standard roof pitches into decimal slope, degrees, roof area multiplier, and practical walkability guidance.
Standard pitch chart
For pitches from 1:12 through 12:12.
| Pitch | Decimal | Degrees | Factor | Walkability |
|---|---|---|---|---|
| 1:121/12 | 0.083 | 4.8° | 1.003 | Walkable |
| 2:122/12 | 0.167 | 9.5° | 1.014 | Walkable |
| 3:123/12 | 0.250 | 14.0° | 1.031 | Walkable |
| 4:124/12 | 0.333 | 18.4° | 1.054 | Caution |
| 5:125/12 | 0.417 | 22.6° | 1.083 | Caution |
| 6:126/12 | 0.500 | 26.6° | 1.118 | Caution |
| 7:127/12 | 0.583 | 30.3° | 1.158 | Steep |
| 8:128/12 | 0.667 | 33.7° | 1.202 | Steep |
| 9:129/12 | 0.750 | 36.9° | 1.250 | Steep |
| 10:1210/12 | 0.833 | 39.8° | 1.302 | Dangerous |
| 11:1211/12 | 0.917 | 42.5° | 1.357 | Dangerous |
| 12:1212/12 | 1.000 | 45.0° | 1.414 | Dangerous |