Find the roof pitch in degrees and as x/12, the rafter length and the sloped roof area from the rise and run.
loading toolHow to use the roof pitch calculator
- Type your numbers in the boxes (pick your currency or units if asked).
- The answer updates as you type: no button to press.
- Copy the result, or share it on WhatsApp with one tap.
Questions
What is the slope factor?
The number you multiply the floor area by to get the sloped roof area.
Is my data private?
Yes. Everything happens inside your own browser: nothing you type or choose is uploaded to us or anyone else.
Is it free?
Completely free, with no sign-up, no watermark and no limit on how many times you use it. Light ads keep the site running.
