Quick answer
Roofing squares quick answer
Answer: One roofing square represents 100 square feet of roof area. Waste is normally added before converting the final area to squares.
Formula: Roofing squares = adjusted roof area ÷ 100.
Example: 2,200 square feet of adjusted roof area equals 22 roofing squares.
Reviewed September 1, 2026 · Methodology
Worked example
Example
A 1,200 sq ft horizontal footprint at 6/12 pitch uses a multiplier of about 1.118, producing about 13.42 squares before waste.
References
Sources & assumptions
Last reviewed September 1, 2026. Defaults are starting points; product-specific inputs are editable wherever coverage varies.
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Quick formula
How to calculate roof squares
1 roofing square = 100 square feet of roof surface. Calculate sloped roof area, add the waste allowance you plan to use, then divide by 100.
After you have the square count, continue with Shingle Bundles, Ridge Cap and the Roof Material Takeoff Calculator.
FAQ
Common questions
How many square feet are in a roofing square?
100 square feet.
Does this include waste?
Yes, when you enter a waste percentage.
Does roof pitch matter?
Yes. Steeper roofs have more surface area than the horizontal footprint.
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