Any idea how I can calculate pixels per inch for a screen when windows scaling is also used?

[Spudgun]

Does anyone know the formula that I can use to check various size/resolution screens please to see what would be broadly similar to my current 27" 1440p 16:9 screen that I run at 125% scaling in Windows?

 

[SpellowHouse]

I would have thought you just divide one by the other. So if your display is 109 ppi then it would be 109/1.25 = 87. I mean I am no expert in this, I am guessing, but it seems logical.