Resolution/ Maths Question

[mattpj02]

So on my old 16:9 monitor I played csgo on 1280*1024 stretched, a 5:4 resolution, now I have a 21:9 monitor and I want to play on the same resolution but a 16:9 version if that makes sense. So i am currently on 1820*1024 however I would like to know what I would resolution I would need to be on, 1024*xxxx to be the exact same amount stretched as if i was on 1280*1024 on a 16:9 monitor. If you can make sense of what i wrote you should be smart enough to help.
Many thanks
Matt

 

[k1114]

You could figure out the % that 5:4 is stretched onto 16:9 then figure out the res that is stretched the same amount but on 21:9. 1680x1024 unless I did something wrong.

 

[mattpj02]

Sounds about right, thanks