Pitched Roof Material Area Calculator
Enter roof footprint including any overhang already measured.
Your result
EVERYDAYEnter your values and select calculate.
On this page How it works & practical examples
How to use the Pitched Roof Material Area Calculator
Enter roof footprint including any overhang already measured. The slope factor assumes all included roof planes have the same pitch.
The calculation
Worked example
100 m² horizontal area at 6:12 pitch is 111.8034 m² of roof; with 10% allowance and 3 m² packs, 41 packs are needed.
Assumptions and limits
No structural design, roof-layout optimizer, valleys, flashing or code rules. Complex roofs and variable pitch need separate sections and product-specific coverage.
Common questions
Which inputs should I use?
Enter roof footprint including any overhang already measured. The slope factor assumes all included roof planes have the same pitch.
What does the result exclude?
No structural design, roof-layout optimizer, valleys, flashing or code rules. Complex roofs and variable pitch need separate sections and product-specific coverage.