# Roof angle

Calculate the Roof angle with our free online tool using the input parameters: Rise, Slope

When it comes to roof framing, the angle is an important factor. The rise run angle calculator helps determine the roof angle by measuring the angle between the rafters, which can vary depending on the roof slope. In the metric system, the roof pitch is often measured by the angle or the unit of run, such as a “1 in x” slope, where a 1 in 1 slope represents a 45° angle. You can use the online roof angle calculator to calculate the angle, run, and roof pitch by entering the rise and slope values.

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Number of calculations

Run(inches) = \frac{Rise}{Slope} \times 100

Angle = \tan^{-1}\left(\frac{Rise}{Run}\right)

Roof Pitch = \frac{Rise}{\frac{Run}{12}}