Area of a Roof

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Equation / Last modified by KurtHeckman on 2017/01/11 18:05
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pro.Area of a Roof

The Area of a Roof calculator computes the surface area of a roof based on the length and width of the area covered and the pitch. 

INSTRUCTIONS:  Choose your preferred units and enter the following:

  • (l) The length of the area covered.
  • (w) The width of the area covered.
  • (p) The pitch of the roof in rise over run

The Area of the Roof is returned in square feet.   RoofCOVERAGE-illustration.png   Single and Double sided Gabled Roofs However this can be automatically converted to other area units via the pull-down menu.

The formula works for gabled roofs with one or two sides(see diagram).  For two sided gabled roofs, this formula is only accurate if the both gables have the same pitch, which puts the ridge in the middle. If the sides have different dimensions, calculate each side separately.