Formula For Square Footage Of A Roof

Multiply this number by your most recent result to get the estimated square footage of your roof.

Formula for square footage of a roof.

1 roof square 100 square feet. Add 1 then take the square root. Multiply the number of roofing squares for a medium pitch roof by 1 12 to 1 25 or by 1 3. Adding 1 gives us 1 1 9 10 9 then taking the square root gives us about 1 0541.

So keeping with our roof pitch of 4 this gives us 1 9. 1 300 x 1 05 1 365 square feet calculating the area true if you want to get the exact area measurement for your roof you can follow these steps. L h 2 area calculating an area of a triangle when estimating a roof. Once you have your roof s pitch divide the number by 12.

Calculate each plane separately. How to calculate square feet of a roof. If your roof is flat or has no more than a 3 in 12 pitch you can calculate its total square footage by simply multiplying the length by the width. Multiply the number of roofing squares for a low pitch roof by 1 06 to 1 08 to get the square roof area.

The calculator cannot account for complex shapes based on a measurement of square footage alone. So if you divide your answer of a product of length times height by two you will get the area of a triangle. Measure the length and width of every roof plane or surface. Multiply the length and width of each square or rectangle shaped plane.

Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy. The length l times the height h of a triangle is twice its area a2.