METHOD
How it is calculated
Area = projection × √(1+(rise/12)²). Mixed-pitch roofs are not modelled.
⌂ Home, building and energy
Roof area and pitch calculator
Convert a horizontal projection to the area of a uniformly pitched roof.
01
Your inputs
Starting values are an example. Replace them with your own.
Your inputs stay in your browser.
02
Your result
Enter your details and run the calculation.
TRACEABLE
Sources and validity
Basic arithmetic or geometry using the formula shown. Uses only your inputs.
How we maintain data ↗