Divide the first part of the ratio by 12 to work out the pitch.
Mono pitch roof angle calculator.
To find the angle of a roof in degrees convert the pitch to a slope then convert to degrees by finding the arc tangent of the slope.
It will use the current cost of wooden rafters based on the average price found at home improvement stores.
Roof pitch calculator roof slope calculator the roof pitch calculator is a convenient online tool you can use to quickly assess the pitch of your roof to determine the length of rafters you need.
Total height of building.
Use the diagrams on this page as a reference when inputting rise and run and while interpreting the calculated results.
Enter any angle or fraction of angle to find pitch.
A 12 12 pitch roof has a pitch angle of 45.
The roof pitch calculator calculates slope pitch angle and rafter lengths based on input of rise m and run r.
To do this simply convert the rise and run as a fraction to a decimal form eg.
After finding out your roof pitch angles you can use the calculator to perform the calculations for you instead of doing them manually.
To convert between american roofing ratios and pitch degrees follow these steps.
First convert the pitch to a slope.
Enter any pitch or fraction of pitch to find angle.
This is our pitch calculator which will convert pitch to angle or angle to pitch for half degree roof slope calculations.