Sloped Roof Area Calculator
Calculate the roof area based on the footprint area and slope.
m²
°
Result
115,4701 m²
Roof area: 115,4701 m²
Result in all units
Step-by-step solution
Roof = footprint ÷ cos(slope)
What Is Roof Area?
Roof area is the actual covering surface that is larger than the footprint area because of the roof slope. It is used when estimating tiles and roofing material.
How is it calculated?
How Is It Calculated?
Roof area = footprint area ÷ cos(slope angle)
- Enter the building footprint area and the roof slope.
As the slope increases, the actual roof area grows even more relative to the footprint.
Frequently Asked Questions
Why is the footprint area not enough?
Because the roof is sloped, the surface is wider than the flat footprint area; material is calculated based on this actual area.