This slope percentage calculator can determine the percentage of slope and angle from the rise and run values.
| Slope % = |
|
× 100% |
Angle (degrees) = tan-1 (rise ÷ run)
Find the slope percentage and angle (in degrees) for a rise of 12' and a run of 25':
| Slope % = |
|
× 100% |
Slope % = 0.48 × 100%
Slope % = 48%
Angle = tan-1 (12 ÷ 25)
Angle = tan-1 (0.48)
Angle = 25.641° or 0.44752 rad