Formula For Roofing Area

Divide your roof pitch by 12.

Formula for roofing area.

So if you divide your answer of a product of length times height by two you will get the area of a triangle. Roof pitch is given as the number of inches in height change over the distance of one foot. The answer to this is the total number of squares on your roof for which you need to purchase shingles. Calculating an area of a triangle when estimating a roof.

Dividing by 12 gives the ratio of inches in rise per distance. For example if your roof s pitch is 4 in 12 you would divide 4 by 12. Next square your result. 1 roof square 100 square feet.

1 9 1. Calculating the area true once you have your roof s pitch divide the number by 12. In the construction industry roofs are measured in squares one square equals 100 square feet.