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Calculate the surface area of your roof

How to calculate pitch from rise and run

roof pitch
In this article, we will talk about calculating the roof pitch (US ), using
- Rise - is the total height of the roof - if the roof extends below the attic, we consider the extension too.
- Run - is half of the roof width. If roof extends the footprint of the house, we consider the extension too.

How to calculate the pitch

Let's say we have a Rise of:
And let's say we have Run of:
We find the grade factor (A) :
A = Rise / Run
A = /
A =
Pitch is A x 12:
pitch = x 12
pitch =
Pitch is = / 12