Roofing Calculator
Result
Roofing Calculator Calculate total roof area, roofing squares, shingles, and underlayment for a gable roof. — free online calculator.
Formula
- Roofing Calculator calculates its result from Footprint, Pitch Multiplier, Pitch, Area. It uses the formula Roof area = footprint × pitch multiplier; multiplier = √(1 + (pitch/12)²); Squares = area / 100. Change any input to recalculate the result instantly.
- The main inputs are Building Length, Building Width, Roof Pitch (rise:12). Enter them in the units and format shown in the calculator.
- Keep measurements and project assumptions consistent before comparing or combining values.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Roofing
- Building Length: 50 ft
- Building Width: 30 ft
- Roof Pitch (rise:12): 6 in/ft
Using Footprint = 2, Pitch Multiplier = 3, Pitch = 4, Area = 5, the calculated result is 0.05.
Sample result: Calculating…
Frequently asked questions
What does the Roofing calculate?
Roofing Calculator Calculate total roof area, roofing squares, shingles, and underlayment for a gable roof. — free online calculator.
Which values should I enter?
Enter Building Length, Building Width, Roof Pitch (rise:12) using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: Roof area=L×W×√(1+(pitch/12)²); roofing squares=(area/100)×1.1; bundles=ceil(3×squares).
Why might my result differ from another source?
Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.