Roof Pitch Calculator

The rise is the distance from the top of the roof to the bottom. The run is the distance from the outside of the wall to the inside of the ridge. Here is an online rise and run calculator which helps to calculate Pitch, Slope and Angle with the help of rise and run values. In roof pitch calculator, pitch value can be obtained by dividing N by 12 and divide S by the answer. To find slope divide rise by run and multiply it by 100 and for angle take tan-1 of S/N

Rise and Run Calculator

length
length
/12
%
degree
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Formula:

Pitch = S / ( N / 12 ) Slope = ( S / N ) × 100 Angle = tan-1 ( S / N )
Where, S = Rise (inches) N = Run (inches)

Example:

Calculate the Pitch, Slope, Angle values of roof having its rise = 20 inches and run = 100 inches.

Solution:

By using Roof Pitch Formulae,
Pitch = S / ( N / 12 )
= 20/(100/12)
= 2.4
Slope = (S/ N ) × 100
= ( 20 / 100 ) × 100
= 20 %
Angle = tan-1( 20 / 100 )
= 11.3099 θ

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