Roof Pitch Calculator

Civil
1 minute

Calculate the Roof pitch with our free online tool using the input parameters: Rise, Run

Calculate the pitch, slope, and angle of a roof using the rise and run values. The rise refers to the vertical distance from the top to the bottom of the roof, while the run is the horizontal distance from the outside wall to the inside ridge. Utilize our convenient online rise and run calculator to determine the pitch, slope, and angle of your roof. The pitch can be obtained by dividing the rise by 12 and dividing the result by the run. To find the slope, divide the rise by the run and multiply by 100. Finally, to obtain the angle, take the arctangent (tan-1) of the rise divided by the run.

Rise
Run
Angle
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    Pitch = \frac{S}{\left(\frac{N}{12}\right)}
    Slope = \left(\frac{S}{N}\right) \times 100
    Angle = \tan^{-1}\left(\frac{S}{N}\right)

    The variables used in the formula are:

    S = Rise (inches)

    N = Run (inches)