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Roof Pitch

Last modified by
on
Jun 8, 2023, 5:51:47 PM
Created by
on
Jun 22, 2016, 1:43:37 PM
`P = "rise" / "Run" `
Toggle Units
`(r) "rise"`
ft
in
`(R) "Run"`
ft
in
Tags
UUID
5222bbac-387f-11e6-9770-bc764e2038f2

The Roof Pitch calculator computes the pitch of a roof based on the rise (r) and the run (R).  /attachments/5222bbac-387f-11e6-9770-bc764e2038f2/RoofPitch.png

INSTRUCTIONS: Choose units and enter the following:

  • (r) rise
  • (R) Run

Pitch (P):  The calculator computes the angle of the pitch in degrees and the approximate rise over run (e.g. 4/12)

The Math / Science

The pitch of a roof is the ratio of the rise over run.  Instead of angles (degrees or radians), a roof's inclination is  typically given as the rise over run ratio.  To formula for the pitch of a roof is:

P = atan(r/R)

where:

  • P = pitch angle in degrees and 12th ratio (e.g., 6/12, 10/12)
  • r = rise
  • R = run


Roof Types

Roofing Calculators

Gable Roof

Hip Roof

Shed Roof

Dormers

Pyramid Hip Roof

Roofing Geometries

Gambrel Roof


Building Calculators


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