Slope as grade for an elevation of 1 m over a distance of 2 m can be calculated as.
How to find the slope of a roof in degrees.
For example if the roof slope is 45 then sec 45 1 414213.
Roof pitch on the form x 12 can be expressed in grades as.
Example slope as grade.
First convert the pitch to a slope.
If you want to find the roof pitch in the form of x 12 simply calculate the pitch and substitute 12 for the run length.
Access one of the rafters then take the measurement this way.
That s your roof slope multiplier.
Pitch tan angle where angle is the roof pitch expressed in degrees.
If you re using the table below you should consider getting yourself a construction calculator.
The most precise way to find the roof s slope is by measuring it from the underside.
Either way let s see how you can calculate the slope of a roof without using a roof slope calculator.
To do this simply convert the rise and run as a fraction to a decimal form eg.
The value displayed as the rise will be your x.
Both are referring to angles.
Rise run rise run slope.
For example if your tape measure found a 6 inch vertical distance to the 12 inch mark on your level the slope is 6 12 or 6 in 12.
Calculate the roof 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.
If you know the roof slope in degrees simply find the secant using a scientific calculator.
This is usually expressed with the rise and followed by the run in the imperial measurement system dominated by number 12 which in turn gives a ratio of the total measurement of the incline for every 1 foot or 12.
S grade 1 m 2 m 50 slope and roof pitch.
How to convert roof pitch to degrees.
The roof s pitch is the vertical rise and it is divided into its horizontal run or span known as slope in stair construction and the tangent function in geometry or trigonometry.
Sometimes slope is referred to as pitch angle rise incline or grade.
Write the roof slope as the ratio of rise over run or vertical distance over horizontal distance.
Measuring the slope from the rafters.
You can find the roof pitch in the form of x 12 like 4 12 or 9 12.
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.
When you want to replace or repair your roof you need to know about the slop of the roof the reason for this is the simple fact that roof slope can affect the overall cost of replacing or repairing the roof.
For example in construction you may refer to the pitch of a roof or the grade of a slab.
Degrees tan 1 43 calculated out this gives an angle of 23 27 degrees.
The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72.
