calculate aspect ratio by using screen pixels

[iap]

i am not getting a proper result on google for calculating a screen aspect ratio. i have physical pixel but how do i calculate aspect ratio of that

[Arika]

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

[jaslion]

Pythagoras formula if you want to get the diagonal distance

 

Otherwise aspect ratio is as simple as Width/height and then normalize it back to 1 if you want.

 

 

[iap]

2 minutes ago, jaslion said:

Pythagoras formula if you want to get the diagonal distance

 

Otherwise aspect ratio is as simple as Width/height and then normalize it back to 1 if you want.

 

 

1366x768 res and 14 inch. cal aspect

[Hairless Monkey Boy]

Length = L

Width = W

Ratio = R

n = a number

 

L:W -> L / W = (n * L) / (n * W) = R

 

Example:

16:10 -> 16 / 10 = 1680 / 1050 = 1.6

 

16:9 - > 16 / 9 = 1920 / 1080 = 1.7778

[jaslion]

Just now, iap said:

1366x768 res and 14 inch. cal aspect

Ok so calculate it yourself or use the link @Arika S provided? It's a almost 16:9 resolution display something like 16:8.98 something this is with rounding errors of course.

[iap]

16:9 0r 21:9 where did it comes from

[iap]

16:9 or 21:9 are pretty standard? if it is standard how this figur come

[mariushm]

14" is the diagonal. 

 

Aspect ratio is the ratio between width and height  : 1366/768 = 1.778 , 16:9 = 1.777  , so your monitor has an aspect ratio of 16:9

 

Think of it like splitting the surface of the screen in squares or tiles, whatever is easier for you.  A 16:9  monitor will have  16 squares horizontally, 9 squares vertically, each square being approx. 85x85 pixels with your particular resolution.

With 1920 x 1080 , we have 120 pixel squares... 16 horizontally, 9 vertically. 

 

The 14" is the length of the diagonal :  diagonal =  square root of (  width²  x height²   )

 

You can calculate the width and heights once you know the dot size (it's usually in specifications of monitor).

 

For example, let's say 0.25 mm square pixels:

1. 0.25mm x  1366 = 341.5mm   = 13.44 inch  ( 25.4 mm in an inch )

2. 0.25mm x   768  = 192.0mm  = 7.559 inch

 

So diagonal = sqrt ( 13.44 x 13.44 + 7.559 x 7.559 ) =  sqrt (180.63+57.13 ) = sqrt ( 237.76)  = 15.4"

 

So a 14" lcd monitor would have a dot size smaller than 0.25mm 

[Chris Pratt]

2 minutes ago, iap said:

16:9 or 21:9 are pretty standard? if it is standard how this figur come

From cinema, mostly. 16:9 and 21:9 are common film aspect ratios. Monitors used to all be 4:3, which itself came from the heritage of TVs. Manufacturers began creating these widescreen displays specifically to cater to people that wanted to watch media on their laptops and such, and it just kind of took over from there.

 

While it is great for media consumption, it absolutely blows for productivity, though. Thankfully, manufacturers are finally starting to realize that people still care about doing work on their displays from time to time, so you're starting to see things like 3:2 make a resurgence.

 

 

 

[jaslion]

1 minute ago, Chris Pratt said:

From cinema, mostly. 16:9 and 21:9 are common film aspect ratios. Monitors used to all be 4:3, which itself came from the heritage of TVs. Manufacturers began creating these widescreen displays specifically to cater to people that wanted to watch media on their laptops and such, and it just kind of took over from there.

 

While it is great for media consumption, it absolutely blows for productivity, though. Thankfully, manufacturers are finally starting to realize that people still care about doing work on their displays from time to time, so you're starting to see things like 3:2 make a resurgence.

 

 

 

Love the fact that at least 16:10 is becoming a standard again and I really do hope that taller becomes a common AFFORDABLE option again.

[mariushm]

Cinema actually used 2.35:1  ratio and even weirder ratios, which is even bigger than 16:9   2.35:1 simply means width 2.35 times bigger than height. You could rewrite it as 21.15:9 or 23.5:10 

 

If you want to learn more about aspect ratios these are VERY informative: 

 

 

 

 

[iap]

1 hour ago, mariushm said:

14" is the diagonal. 

 

Aspect ratio is the ratio between width and height  : 1366/768 = 1.778 , 16:9 = 1.777  , so your monitor has an aspect ratio of 16:9

 

Think of it like splitting the surface of the screen in squares or tiles, whatever is easier for you.  A 16:9  monitor will have  16 squares horizontally, 9 squares vertically, each square being approx. 85x85 pixels with your particular resolution.

With 1920 x 1080 , we have 120 pixel squares... 16 horizontally, 9 vertically. 

 

The 14" is the length of the diagonal :  diagonal =  square root of (  width²  x height²   )

 

You can calculate the width and heights once you know the dot size (it's usually in specifications of monitor).

 

For example, let's say 0.25 mm square pixels:

1. 0.25mm x  1366 = 341.5mm   = 13.44 inch  ( 25.4 mm in an inch )

2. 0.25mm x   768  = 192.0mm  = 7.559 inch

 

So diagonal = sqrt ( 13.44 x 13.44 + 7.559 x 7.559 ) =  sqrt (180.63+57.13 ) = sqrt ( 237.76)  = 15.4"

 

So a 14" lcd monitor would have a dot size smaller than 0.25mm 

diagonal in pixel = √(1366^2 + 768^2) = 1567.09,
 

ppi = diagonal in pixel / diagonal in inch,

 

ppi = 1567 / 14 = 111,

 

pixel squire per inch = 111^2 = 12321,

 

dot pitch = 14/1567 x 25.4 = 0.2269

 

[IPD]

Somewhat tangential, but I use this website to compare actual display size, based on different aspect ratios/dimensions.

 

https://www.displaywars.com/

[iap]

anybody have suggest deep down video link for ips, tn and va working