Engineering & Construction
Roof Area Calculator
Turn a horizontal roof plan into sloped area using rise and run.
Free forever.
Sloped area = plan area × √(run² + rise²) / run. The plan area is the horizontal area covered by the roof.
Result
Press Calculate.
Result
Press Calculate.
How to use the Roof Area Calculator
- Enter the plan length and width of the roof.
- Enter rise and run in the same unit.
- Read the plan area, the sloped area and the pitch.
Questions
What is the plan area?
The horizontal area the roof covers, not the area of the sloping sheets.
Are eaves and hips extra?
Only if they are inside the plan size you enter. Valleys and overlaps are not added.
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