Divide the first part of the ratio by 12 to work out the pitch.
Roof pitch 10 12 degrees.
Enter any pitch or fraction of pitch to find angle.
You can also calculate roof pitch even without using a roof slope calculator.
The 12 inch run is considered standard in roof pitch or angle terminologies.
Also referred to as 10 12 roof slope 10 on 12 10 to 12 and 10 12 roof angle.
Find all the needed factors in order to determine the pitch angle s degree.
12 pitch 45 degrees 11 pitch 42 5 degrees 10 pitch 40 degrees 9 pitch 37 degrees 8 pitch 33 75 degrees 7 pitch 30 5 degrees 6 pitch 26 5 degrees 5 pitch 22 5 degrees 4 pitch 18 5 degrees 3 pitch 14 degrees 2 pitch 9 5 degrees 1 pitch 4 5 degrees 0 pitch 0 degrees.
This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees.
45 this is our pitch calculator which will convert pitch to angle or angle to pitch for half degree roof slope calculations.
The calculator above can handle much of this math.
How roof pitch manifests itself in various roof types.
Since pitch is the rise over a 12 inch run divide the run by 12 to get the multiplier in this case 120 12 10.
Locate its tangent or tan and follow the left row for you to read its corresponding degree.
Other than the 45 roof slope which is 12 in 12 none of the standard roof pitches 5 in 12 6 in 12 etc are equal to a whole degree.
So use the 12 inch level as a constant run and 18 inch ruler as a variable rise.
High pitched roofs often need extra fasteners and their pitch can be as high as 21 12.
The pitch of this roof is 4 8 12.
Last updated july 10 2020 the following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72.
10 12 roof pitch equivalents roof rises 10 in a length of 12.
48 10 4 8.
To convert between american roofing ratios and pitch degrees follow these steps.
Conventional roofs are the easiest to construct and you can walk on them safely.
On blue prints architects engineers usually display the pitch of a roof in the format shown on the image where number 4 represents a rise and number 12 represents a length.
These roofs have a pitch less than 4 12.
There are many websites which are offering this facility.
10 12 roof pitch angle 39 81 degrees.
Find the inverse tangent of the pitch to find the angle in degrees.
They have a pitch ranging from 4 12 to 9 12.
10 12 roof pitch to angle 39 81 degrees.
A 12 12 pitch roof has a pitch angle of 45.
10 12 roof pitch angle 39 81 degrees.
Enter any angle or fraction of angle to find pitch.