How To Find The Slope Of A Roof In Degrees

The most precise way to find the roof s slope is by measuring it from the underside.

How to find the slope of a roof in degrees.

Roof pitch on the form x 12 can be expressed in grades as. For example if the roof slope is 45 then sec 45 1 414213. 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. The value displayed as the rise will be your x.

Measuring the slope from the rafters. Calculate the roof slope. First convert the pitch to a slope. The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72.

Both are referring to angles. 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. Degrees tan 1 43 calculated out this gives an angle of 23 27 degrees. Either way let s see how you can calculate the slope of a roof without using a roof slope calculator.

Many different professions use slope in describing an angle. You can find the roof pitch in the form of x 12 like 4 12 or 9 12. Sometimes slope is referred to as pitch angle rise incline or grade. 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.

How to convert roof pitch to degrees. Write the roof slope as the ratio of rise over run or vertical distance over horizontal distance. If you re using the table below you should consider getting yourself a construction calculator. 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.

S grade 1 m 2 m 50 slope and roof pitch. Pitch tan angle where angle is the roof pitch expressed in degrees. If you know the roof slope in degrees simply find the secant using a scientific calculator. Roof pitch is the slope created by the rafter.

There are a number of ways that you can calculate the roof slope of your home and you need to be aware of this. 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. Access one of the rafters then take the measurement this way. That s your roof slope multiplier.

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. To do this simply convert the rise and run as a fraction to a decimal form eg. Rise run rise run slope. Example slope as grade.