Drag the slider to animate or with phone or tablet measure directly from roof surface.
How to work out an angle of a roof.
Rise run rise run slope.
Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m.
Locate the level s 12 inch mark.
Pipe tube through sheeting angle offset diagram.
Enter set base measurement and use dimensions from the diagram at right to set pipe at correct angle through roof or sheeting.
Determine the vertical height between the base of the roof and the highest point.
Then mark height on vertical level to roof surface remove levels and measure marked height.
If you prefer to work the angle out the traditional way without our handy calculator you can use the following equations to find the length of the rafter and the slope.
Pitch rise run 1 5 6 25.
For many people working out the roof pitch angles can be a bit of a nightmare especially if you are going to do it yourself and try to manage it all on your own.
Divide the length of the horizontal leg by the length of the diagonal leg using the calculator.
How to figure roof angles.
Use a level against the underside of the rafter you re measuring to get the most accurate value.
To do this simply convert the rise and run as a fraction to a decimal form eg.
First convert the pitch to a slope.
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.
The angle of your roof is calculated the same way you d work the angle of a right angled triangle.
Access one of the rafters then take the measurement this way.
Angle arctan pitch arctan 0 25 14.
Recalculate this value into an angle.
Press the inverse button then press the cosine button to display the angle between the horizontal and diagonal legs.
Angle the angle of a roof is the same as the roof s slope except instead of being represented as x 12 it is represented in degrees.
Rafter height width from pythagoras remember that at school so.
Calculate the roof pitch as the proportion of rise and run.
Calculate the angle between the horizontal and diagonal legs of a right triangle.
This can be read from the architect s.
Measure and mark length on horizontal level to vertical level.
Determine the distance from the edge of the roof to a point on the same plane directly under the highest point.
The most precise way to find the roof s slope is by measuring it from the underside.
Naturally this does not go down particularly well without the right tools knowledge and assistance.
Record this as the roof width.
For a vertical plumb pipe through a pitched roof the corresponding roof pitch 12 12 or 45.
