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Roof Pitch Calculator
Calculate roof pitch from rise and run.
in
in
Live Calculation
Roof Angle
18.43
°
Pitch Factor
1.05
Live Step-by-Step Calculation
# Given Values:
Rise: 4 in
Run: 12 in
# Formula:
Roof Angle = atan(rise / run) * (180 / 3.14159)
Roof Angle = atan(rise / run) * (180 / 3.14159)
# Substitution:
Roof Angle = atan(4 / 12) * (180 / 3.14159)
Roof Angle = atan(4 / 12) * (180 / 3.14159)
Final Answer: 18.435 °
How it Works
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