[android] What are the aspect ratios for all Android phone and tablet devices?

I'm looking for a list of all screen aspect ratios for popular Android based Phones and Tablets.

In case anyone wanted more of a visual reference:

Decimal approximations reference table:

+----------------------------------------------------------------------------+
¦       aspect ratio       ¦     decimal approx.    ¦     decimal approx.    ¦
¦ [long edge x short edge] ¦ [short edge/long edge] ¦ [long edge/short edge] ¦
¦--------------------------+------------------------+------------------------¦
¦         19.5 x 9         ¦        0.462...        ¦        2.167...        ¦
¦--------------------------+------------------------+------------------------¦
¦          19 x 9          ¦        0.474...        ¦         2.11...        ¦
¦--------------------------+------------------------+------------------------¦
¦        ~18.7 x 9         ¦        0.482...        ¦        2.074...        ¦
¦--------------------------+------------------------+------------------------¦    
¦         18.5 x 9         ¦        0.486...        ¦        2.056...        ¦
¦--------------------------+------------------------+------------------------¦
¦          18 x 9          ¦           0.5          ¦            2           ¦
¦--------------------------+------------------------+------------------------¦
¦          19 x 10         ¦        0.526...        ¦           1.9          ¦
¦--------------------------+------------------------+------------------------¦
¦          16 x 9          ¦         0.5625         ¦        1.778...        ¦
¦--------------------------+------------------------+------------------------¦
¦           5 x 3          ¦           0.6          ¦        1.667...        ¦
¦--------------------------+------------------------+------------------------¦
¦          16 x 10         ¦          0.625         ¦           1.6          ¦
¦--------------------------+------------------------+------------------------¦
¦           3 x 2          ¦        0.667...        ¦           1.5          ¦
¦--------------------------+------------------------+------------------------¦
¦           4 x 3          ¦          0.75          ¦        1.333...        ¦
+----------------------------------------------------------------------------+

Changelog:

• May 2018: Added 56x27 === ~18.7x9 (Huawei P20), 19x9 (Nokia X6 2018) and 19.5x9 (LG G7 ThinQ)
• May 2017: Added 19x10 (Essential Phone)
• March 2017: Added 18.5x9 (Samsung Galaxy S8) and 18x9 (LG G6)

The Sony Tablet P is old, but it can switch between 32:15 and 32:30 for each app in landscape mode, and vice-versa in portrait mode, so that's a minimum range to aim for

It is safe to assume that popular handsets are WVGA800 or bigger. Although, there are a good amount of HVGA screens, they are of secondary concern.

List of android screen sizes

http://developer.android.com/guide/practices/screens_support.html

Aspect ratio calculator

http://andrew.hedges.name/experiments/aspect_ratio/

the best way to calculate the equation is simplified. That is, find the maximum divisor between two numbers and divide:

ex.

1920:1080 maximum common divisor 120 = 16:9
1024:768  maximum common divisor 256 = 4:3
1280:768  maximum common divisor 256 = 5:3

may happen also some approaches

I researched the same thing several months ago looking at dozens of the most popular Android devices. I found that every Android device had one of the following aspect ratios (from most square to most rectangular):

• 4:3
• 3:2
• 8:5
• 5:3
• 16:9

And if you consider portrait devices separate from landscape devices you'll also find the inverse of those ratios (3:4, 2:3, 5:8, 3:5, and 9:16)

More complete answer here: stackoverflow community spreadsheet of Android device resolutions and DPIs