To accurately calculate the area of your roof you must first determine its slope or pitch.
How to figure roofing estimate.
Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs.
Our calculator will estimate your total roofing cost installed including the cost of materials labor and warranty for any major type of roof including 3 tab asphalt shingles architectural and premium composition shingles pvc tpo epdm rubber built up roofs cedar shakes and shingles clay tiles natural slate and metal roofing.
The first step in a free roofing estimate is measuring the roof dimensions.
Since it takes 3 bundles of shingles to cover a square plan to purchase 3 bundles for each square.
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To calculate the size of the roof you need to measure the size of the roof as if it were flat account for roof pitch calculate square footage and finally determine how many squares of material are required for the roof the calculator above can handle all of this simply enter the length width and pitch and it will determine the size of the roof in squares.
You will need to express this size in terms of square feet.
A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally.