HOW IT IS CALCULATED
Estimate gable roof surface area
Correct the building footprint area using the cosine of the roof pitch.
Instant resultClear formulaRuns locally
01Values
02footprint area ÷ cos(pitch)
03Result
A steeper roof has more surface area than its horizontal footprint.
Pitch increases actual surface area
The horizontal footprint understates the material area once the roof is inclined.
02
In short
What logic does the calculator use?
footprint area ÷ cos(pitch)
Example?
A steeper roof has more surface area than its horizontal footprint.