Engineering & Construction
Roof Area Calculator
Turn a horizontal roof plan into sloped area using rise and run. The slope factor is the sloping length divided by the horizontal run.
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How to use the Roof Area Calculator
- 1Enter the plan length and width of the roof.
- 2Enter rise and run in the same unit.
- 3Read 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.