Understanding Roof Pitch: Angle, Degree, and Slope Conversion

Q: 30 Degree Roof Pitch

A 30° roof pitch is roughly the same as a 7/12 roof pitch. To convert from degrees to the American ratio: Find the tangent of the angle, tan(angle). This gives you the pitch of the roof.

Q: 45 Degree Roof Pitch

Roofs with a pitch of 12/12 are approximately 45 degrees, depending on how exact you'd like to be in your measurement. Check out our roof angle chart for more examples of the exact angles (expressed in degrees) of common roof pitches.

Q: Normal Roof Pitch

The most common roof pitches are 4/12, 6/12, and 8/12. These ratios mean that for every 12 inches of horizontal distance (run), the roof rises 4, 6, or 8 inches vertically (rise).

Q: 4 12 Roof Pitch in Degrees

Roofs with a pitch of 4/12 are approximately 18.4 degrees, depending on how exact you'd like to be in your measurement.

Q: Figuring Roof Pitch

The angle, or pitch, of a roof is calculated by the number of inches it rises vertically for every 12 inches it extends horizontally. For example, a roof that rises 6 inches for every 12 inches of horizontal run has a 6-in-12 pitch.

Roof Pitch to Angle

Roof Pitch is a term describing how steep or flat your roof slope is. The combination of two numbers is used to display or show the roof pitch.

Plan and construction of shelters will bless many items, but one of the most popular items is the weather state of your surrounding areas, town, and nation.

Pitch roof angle will be the angle created between the roof rafter and the horizontal run or the quantity of rise made by the rafter, which will incline to a parallel run to form the roof’s pitch.

Generally, the roof pitch angle is a radius between 18 degrees to 37 degrees for standard pitch.

The area with rainstorm and snowfall need a good pitch for the roof based on the slope of the top and layout; depending on the slope of the roof, it will classify into two types uniform roof and sloping roof.

These are two types of roof designs based on slop.

A flat roof is the type of roof in which the slope usually is less than 10 degrees, which only ensures adequate rainwater pump in lower to familiar rainfall places.

A pitched roof comprises a sloping floor with an angle of over 20 degrees; usually, it slopes downward in one, two, or more parts depending on the structure and house.

In this article, you learn about roof pitch to angle, pitch roof angle, and angle to roof pitch discussion.

If the rising roof will calculate a fraction drop in the range 4/12- 9/12 slope, calculate the proportion of the field of 4:12- 9:12 slope, measured in ratio of the area 25%- 75%, and calculate the degree in the field of 18 degrees to 37 degrees.

Pitch for the roof, or slope means how many inches height the roof upright rises for every 12 sizes or 1 foot in a parallel distance run.

An example of a pitch for a roof would be a 5/12 or ”5 in 12” slope means that the roof upright rises 5 inches for every 1 foot or 12 heights of parallel distance run.

There are two recommended ways to calculate a roof pitch or ratio in degrees. Let us know about some explanation or rafter, rise, and run, which help in better recognizing while measuring the slope of a roof.

Rise is explained as the good change in height per unit of parallel length or run. For example, a pitch of 4/12 represents 4” good height or rise for every 1 foot or 12 inches of similar space or run.

The general rise value for the pitched roof is a radius between 4” to 9” for every 12 inches of run.

These are good and standard heights of hill usually used for conventional design such as a garage, residential building, shed, etc.

Run will explain the space from the exterior of the top wall plate to a point right under the center of the beat.

It is a parallel distance for pitch and rafter design used as part of the roof or moment of top to the outside wall plate.

It can explain as a design component of a pitched roof inclined to parallel run by a certain angle in degrees.

Useful Article for You

Roof Pitch to Angle Degree Chart

Roof pitch is a term that defines how steep or uniform your roof slope is. The mix of two numbers will be used to show the roof pitch.

Two most general methods (4/12 or 4; 12) are used to point the pitch of a roof. On blueprints, architects & builders generally display the pitch of a shelter in the pattern shown.

on the profile where the number (4) performs a rise, and the number (12) represents a length. It means if a roof is 4′ in the size of 12′, your roof pitch would be 4/12 or 18.43 degrees.

Roof Pitch and Corresponding Angles

Roof pitch (slope)	Roof Angle(degree)
1:12 pitch	4.76°
2:12 pitch	9.46°
3:12 pitch	14.04°
4:12 pitch	18.43°
5:12 pitch	22.62°
6:12 pitch	26.57°
7:12 pitch	30.26°
8:12 pitch	33.69°
9:12 pitch	36.87°
10:12 pitch	39.81°
11:12 pitch	42.51°
12:12 pitch	45.00°
13:12 pitch	47.29°
14:12 pitch	49.4°
15:12 pitch	51.34°
16:12 pitch	53.13°

Slope Factor Chart 1:12 Pitch -6:12 Pitch

Valley & Hip factor	1.4167	1.424	1.4362	1.453	1.4743	1.5
pitch of roof	1:12	2:12	3:12	4:12	5:12	6:12
Slope factor	1.118	1.118	1.118	1.118	1.118	1.118

Slope Factor Chart7:12 Pitch-12:12 Pitch

Slope Factor	1.1577	1.2019	1.25	1.3017	1.3566	1.4142
valley & Hip factor	1.5298	1.5635	1.6008	1.6415	1.6853	1.732

Useful Article for You

Roof Pitch-To-Angle Converter

The following table shows the degree parallel for all roof slopes’ quality pitch from 1/s-in -12 to 361/2-in-12.

To see the percent parallel for quality rise-in-run roof pitches, visit our page for three ways of indicating roof slop.

That page also describes the math that allows you to convert any roof slope show in any way to any other way.

Pitch to degrees, parallel to degrees, degrees to percentage, etc. This will help you find the conversion quality for any slope not listed.

Conversion formula for standard roof pitch to degrees

That is how you convert a slope shown in quality roof pitch (even a hill that includes a fraction) to degrees:

To alter a roof slope shown as “X-in-12” to a roof slope expressed in degrees, find the arctangent of (rise/run).
Cut up the rise (that’s the “X,” your “X” will divide according to how steep the roof is) by the run (the run is every time 12).
Using a scientific calculator, find the arctangent of the solution.

There’s a good calculator here at web2.0cals.com. Click the “2nd” hook (top left of the calculator pitch.

First, enter the number you got from dropping your rise by your run (0.791667 in the following example).

Then click the “at a” hook and then the = button. It will give you the arctangent of (rise/run).

There’s a good calculator here at web2.0cals.com. Click the “2nd” hook (top left of the calculator pitch.

First, enter the number you got from dropping your rise by your run (0.791667 in the following example).

Then click the “at a” hook and then the = button. It will give you the arctangent of (rise/run).

Also Read: What Are Flat Roofs | Types of Flat Roofs | What Is Flat Roofing Material | Pros and Cons for Flat Roof Materials

Roof Pitch to Degrees Conversion.

12/13	450°
12.5/12	46.17°
13/12	47.29°
13.5/12	48.37°
14/12	49.4°
14.5/12	50.39°
15/12	51.25°
15.5/12	52.25°
16/12	53.13°
16.5/12	53.97°
17/12	54.78°
17.5/12	55.56°
18/12	56.31°
18.5/12	57.03°
19/12	57.72°
19.5/12	58.39°
20/12	59.04°
20.5/12	59.66°
21/12	60.26°
21.5/12	60.83°
22/12	61.39°
22.5/12	61.93°
23/12	62.45°
23.5/12	62.95°
24/12	63.43°
24.5/12	63.9°
25/12	64.63°
25.5/12	64.8°
26/12	65.22°
26.5/12	65.64°
27/12	66.04°
27.5/12	66.43°
28/12	66.80°
28.5/12	67.17o
29/12	67.52°
29.5/12	67.86°
30/12	68.2°
30.5/12	68.52°
31/12	68.84°
31.5/12	69.15°
32/12	69.44°
32.5/12	69.73°
33/12	70.02°
33.5/12	70.29°
34/12	70.56°
34.5/12	70.82°
35/12	71.08°
35.5/12	71.32°
36/12	71.57°
36.5/12	71.80°

The following table displays the roof pitch (rise-in-run) parallel for all roof slopes in degrees from 1o to 72o.

Other than the 45o roof slope, which is 12-in-12, none of the quality roof pitches (5-in-12, 6-in-12, etc.) is uniform to a full degree.

The conversion formula for degrees to standard roof pitch
is how you convert a slope shown in degrees (even a hill that covers a portion of a degree) to deliver roof pitch.

He fined the supplement of the degree value.
Increase the tangent by the run (which is by convention all the time 12.)
That gives you the leap. Put the sensibly as rise-in-run.
Table 2: slopes in degrees converted to standard roof pitch
If you’re definitely what the slope of your roof is and want to control that in or degrees either rise-in-run, we approve this slope finder on Amazon. It was very cheap and very correct.
If you’re using this list, you can look into getting yourself a building calculator.

Also Read: Residential Roofing | Which Residential Roof Type Is Best for You | Types of Roofing | Find the Right Roof Type for Your Home Based on Design and Price

Convert roof slop From degrees To standard roof pitch
Roof angle In degrees	Roof slope as Rise in run (x in 12)
1°	0.209 in 12
2°	0.419 in 12
3°	0.629 in 12
4°	0.839 in 12
5°	1.050 in 12
6°	1.261 in 12
7°	1.473 in 12
8°	1.687 in 12
9°	1.901 in 12
10°	2.116 in 12
11°	2.333 in 12
12°	2.551 in 12
13°	2.770 in 12
14°	2.991 in 12
15°	3.215 in 12
16°	3.441 in 12
17°	3.669 in 12
18°	3.899 in 12
19°	4.132 in 12
20°	4.368 in 12
21°	4.606 in 12
22°	4.848 in 12
23°	5.094 in 12
23°	5.343 in 12
24°	5.596 in 12
25°	5.853 in 12
26°	6.114 in 12
27°	6.381 in 12
28°	6.652 in 12
29°	6.928 in 12
30°	7.210 in 12
31°	7.498 in 12
33°	7.793 in 12
34°	8.094 in 12
35°	8.403 in 12
36°	8.719 in 12
37°	9.043 in 12
38°	9.375 in 12
39°	9.717 in 12
40°	10.069 in 12
41°	10.431 in 12
42°	10.805 in 12
43°	11.190 in 12
44°	11.588 in 12
45°	12.000 in 12
46°	12.426 in 12
47°	12.868 in 12
48°	13.327 in 12
49°	13.804 in 12
50°	14.301 in 12
51°	14.819 in 12
52°	15.359 in 12
53°	15.925 in 12
54°	16.517 in 12
55°	17.138 in 12
56°	17.791 in 12
57°	18.478 in 12
58°	19.204 in 12
59°	19.971 in 12
60°	20.785 in 12
61°	21.649 in 12
62°	22.569 in 12
63°	23.551 in 12
64°	24.604 in 12
65°	25.734 in 12
66°	26.952 in 12
67°	28.270 in 12
68°	29.701 in 12
69°	31.261 in 12
70°	32.970 in 12
71°	34.851 in 12
72°	36.932 in 12

FAQ

4 12 Pitch Angle

What angle is a 4 over 12 pitch? Roofs with a pitch of 4/12 are approximately 18.4 degrees, depending on how exact you’d like to be in your measurement. Check out our roof angle chart for more examples of the exact angles (expressed in degrees) of common roof pitches.

Standard Roof Pitch

Conventional slope roofs are most common with residential roofs. This means the slope has a pitch between 4/12 and 9/12 on most homes.

6 12 Pitch Angle

What angle is an 6 over 12 pitch? Roofs with a pitch of 6/12 are approximately 26.57 degrees, depending on how exact you’d like to be in your measurement. Check out our roof angle chart for more examples of the exact angles (expressed in degrees) of common roof pitches.

30 Degree Roof Pitch

A 30° roof pitch is roughly the same as a 7/12 roof pitch. To convert from degrees to the American ratio: Find the tangent of the angle, tan(angle). This gives you the pitch of the roof.

45 Degree Roof Pitch

Roofs with a pitch of 12/12 are approximately 45 degrees, depending on how exact you’d like to be in your measurement. Check out our roof angle chart for more examples of the exact angles (expressed in degrees) of common roof pitches.

Normal Roof Pitch

The most common roof pitches are 4/12, 6/12, and 8/12. These ratios mean that for every 12 inches of horizontal distance (run), the roof rises 4, 6, or 8 inches vertically (rise).

Flat Roof Angle

Ideally, a flat roof needs to slope at least one-quarter inch every one foot— allowing for a slope of 1 to 10 degrees.

Measure Roof Pitch

Measure the rafter run, the horizontal distance of a single rafter. This will be equal to one-half the span of the roof. Divide the rise by the run to calculate the pitch.

4 12 Roof Pitch in Degrees

Roofs with a pitch of 4/12 are approximately 18.4 degrees, depending on how exact you’d like to be in your measurement.

Figuring Roof Pitch

The angle, or pitch, of a roof is calculated by the number of inches it rises vertically for every 12 inches it extends horizontally. For example, a roof that rises 6 inches for every 12 inches of horizontal run has a 6-in-12 pitch.

What Angle Should a Roof Pitch Be?

Conventional Pitch Roofs: Anything between 25 degrees and 47.5 degrees would be considered a conventional pitch truss. These are the easiest to construct and maintain. High Pitched Roofs: Over 47.5 degrees would be considered a high pitched roof.

What Is the Most Common Roof Pitch Angle?

What are the most common roof pitches? The most common roof pitches are 4/12, 6/12, and 8/12.

How to Determine Pitch of Roof?

The angle, or pitch, of a roof is calculated by the number of inches it rises vertically for every 12 inches it extends horizontally.

How to Measure Roof Slope?

Measure the height from the roof or rafter to the level 12 inches away from where it meets the surface. This measurement will be your rise. Display this measurement as a ratio of rise over run. For example, if your roof rises 4 inches over a run of 12 inches, then it has a roof pitch of 4:12.

How Roof Pitch Is Measured?

It’s usually measured as a ratio with two numbers separated by a colon (e.g., 4:12) or slash (e.g., 4/12). The first number is the roof rise and the second number is the roof run. A roof pitch of 4:12, for example, means that the roof rises 4 inches for every 12 inches of roof run.

How to Calculate Roof Pitch in Degrees?

How to Calculate Roof Pitch in Degrees

First, you need to measure the run of your roof.
Next, you need to figure out the rise.
Now, divide the rise by the run.
Then, use the arctan function on your calculator (tan-1), or simply type arctan (*tangent*) into google.

Note

Like this post? Share it with your friends!

Suggested Read –

Roof Pitch to Angle: What Roof Pitch Is 30 Degrees?