How Do I Estimate The Square Footage Of My Roof

In cases where a roof has a complex shape such as in the image to the right measuring the dimensions and areas of each part of the roof to calculate total area will result in a more accurate measurement of area.

How do i estimate the square footage of my roof. This tool is useful for finding the approximate acreage or a tract of land the square footage of a roof or any other instance where you need a good estimate of the area of something. To do this measure the length and width of each plane on the roof including dormers. For example take an area made up of a triangle that s 20 feet high and has a base of 40 feet plus a square that s 40 feet by 40 feet. Adding 1 gives us 1 1 9 10 9 then taking the square root gives us about.

Add 1 then take the square root. Approximate price in dollars the estimate of a final price will depend to a large degree on the overall size of your home i e. Square the result of step 1. Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy.

Then multiply length x width to get the square footage of each plane. As you add points the area will be updated below and converted into acres square feet meter kilometers and miles. Convert the area to roofing squares. For example this shed roof has one roof plane.

Finally calculate your roof s total square footage by simply adding the square footage of each of the planes together. Roof area measured in sq ft number of squares. Roof width measured in feet roof pitch. The answer is the number of roofing squares for the roof.

After you ve done this you can click along the outer edge of the roof that you wish to calculate the area for. Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100. Flat roofs 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. Each time you add points the area will update and there is a box below that will convert this into acres meters kilometers miles and finally square feet.

It will also give you the perimeter of the shape of the roof. If your roof measures 48 feet 15 m x 24 feet 7 3 m multiplying its length by its width would give you a square footage of 1 152 square feet 107 0 m 2. Divide any irregularly shaped areas of the roof into more manageable triangles and rectangles then calculate square footage for those individual elements and add them to get the total square footage. If its pitch is 6 in 12 a pitch multiplier of 1 12 multiplying 1 152 sq ft 107 0 m 2 by 1 12 would give you an overall square footage of 1 290 square feet 120 m 2.

The calculator cannot account for complex shapes based on a measurement of square footage alone.