This calculator calculates the roof area using roof base length, roof base width, roof pitch values.
Formula:
Common Rafters = B / (2 x cos α)
Hip Rafters = √(H2 +(B2 / 2))
Hip Roof Area = 2 x Common Rafters x Roof Base Length
B = Roof Base Width
α = Roof Pitch
tan = Tangent
cos = Cosine