Roof Slope Calculator (Online)

Roof Slope Calculator (Online)

Angle • Pitch • % • Ratio

Inputs

Input mode Rise + Run Angle (degrees) Slope (%) Pitch (X : 12)

Units meters (m) millimeters (mm) centimeters (cm) feet (ft) inches (in)

Rise (vertical)

Run (horizontal)

Angle (degrees)

 

Slope (%)

 

Pitch (X : 12)

 

Optional: Run length (for height diff)

Optional note

Works for roof slab, metal roof, canopy, or any sloped surface.

Results

Angle

— °

Slope

— %

Ratio (Rise : Run)

—

Pitch (X : 12)

—

Formulas:
Angle: θ = arctan(Rise/Run)
Slope%: (Rise/Run) × 100
Pitch: X:12 = (Rise/Run) × 12
Height diff (optional): Δh = (Rise/Run) × RunLength

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