Rise Run Slope Calculator

Roof pitch or Roof Slope is the measure of angle of the roof that lie above the horizontal plane. Roof would be flat or 'pitched'. It can be expressed as the amount of vertical rise (in inches) for every foot of horizontal length along the gable. The pitch of roof is its vertical rise divided by its horizontal span. Use slope pitch calculator to find roof pitch and run by providing rise and angle. Rise Run Slope calculator is very useful for building construction engineers.

Slope Pitch Calculator

length
/12
%

Roof pitch or Roof Slope is the measure of angle of the roof that lie above the horizontal plane. Roof would be flat or 'pitched'. It can be expressed as the amount of vertical rise (in inches) for every foot of horizontal length along the gable. The pitch of roof is its vertical rise divided by its horizontal span. Use slope pitch calculator to find roof pitch and run by providing rise and angle. Rise Run Slope calculator is very useful for building construction engineers.

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Formula:

Run(inches) = Rise / tan(angle) Roof Pitch = Rise / ( Run/ 12 ) Slope = ( Rise / Run) × 100

Example:

If the Rise of a roof = 25 inches and angle = 26.57 degree. Find the values of Run, Roof Pitch, Slope?

Solution:

Run = Rise / tan(angle)
= 25 / tan(26.57)
= 49.9892 inches
Roof Pitch = Rise / (( Rise / tan(angle)) / 12 )
= 25 / (( 25 / tan(26.57)) / 12 )
= 6.0013
Slope = ( Rise / ( Rise / tan(angle))) × 100
= ( 25 / ( 25 / tan(26.57))) × 100
= 50.0108

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