Roof Area Calculator
Convert flat building footprint measurements to actual sloped roof area based on pitch angle degrees.
Interactive Calculator
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Worked Example
Gable Roof Pitched Area
Building Length: 18.0 m Building Width: 10.0 m Roof Pitch Angle: 22.5° Footprint Area: 180.00 m² Pitch Factor: 1.082 (approx.) Actual Roof Area: 194.84 m² Use this pitched area to estimate roofing sheet metal, tiles, insulation, and membrane quantities accurately.
Using this on a live tender?
Avoid manual measurement altogether. Send us the drawing set, and our team will prepare a standard-compliant takeoff and BOQ for you.