Find the tangent of the angle tan angle.
Degree lean to roof pitch.
A 30 roof pitch is roughly the same as a 7 12 roof pitch.
To convert from degrees to the american ratio.
A 4 12 pitch is around 18 5 degrees but not exactly.
How to convert angle in degrees to roof pitch.
The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run.
If you know the angle of the roof in degrees you can find the roof pitch by converting the angle in degrees to a slope then finding the rise by multiplying the slope by 12.
Roof pitch refers to the amount of rise a roof has compared to the horizontal measurement of the roof called the run.
Then multiply the slope by 12 to get the rise.
First find the slope by finding the tangent of the degrees eg.
This gives you the pitch of the roof.
A ratio is the most common way of expressing roof pitch or roof slope but degrees are also possible.
Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio.
However you can only use this pitch with built up roofing or specialized synthetic roofing.