Engineering & Construction
Roof Pitch Calculator
Convert rise and run into roof pitch in degrees, percent, a rise in 12 and a 1-in-n gradient.
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This runs entirely in your browser. Nothing you type is sent to a server.
How to use the Roof Pitch Calculator
- 1Measure the rise and the horizontal run in the same unit.
- 2Enter both.
- 3Read degrees, percent, the in-12 figure and the gradient.
Questions
What is an in-12 pitch?
It is how far the roof rises over a 12-unit run. A rise of 6 over a run of 12 is 6/12.
Do the units matter?
Only that rise and run use the same unit. Metres over metres and millimetres over millimetres give the same pitch.