How big is my phone screen for watching videos?

iPhone 16 Pro boasts a 6.3" - good move, product manager of iPhone 16 series, but it doesn't explain how big my YouTube videos would look, relative to my Pixel 3 - a spare device I use to tune into DIY or entertainment videos on YouTube, most of them bear a 16:9 aspect ratio.

I'm gonna compare how bigger a typical YouTube video looks on the newer 6.3" iPhone 16 Pro versus the Pixel 3's 5.5" screen. There's some high school math involved, but you can compare video size displayed on your existing phone with a new phone you are about to purchase/pre-order online, to give a sense of how big would a video look on that gorgeous new screen?

Image without description

Math involved is as simple as using Pythagoras’ theorem. The missing element here is aspect ratio: iPhone 16 Pro boasts a 19.5:9 aspect ratio 6.3" (16 cm) screen, while Pixel 3 boasts an 18:9 aspect ratio 5.5" (13.97 cm) screen. Screen sizes are always specified diagonally.

Now, for the math,

For iPhone 16 Pro,

(19.5x)^2 cm +  (9x)^2 cm = 16^2 cm
i.e. x ==> 0.7449 cm

16:9 Video Height i.e. 9x = 6.70 cm
16:9 Video Width i.e. 16x = 11.91 cm

-- --

For Pixel 3,

(18x)^2 cm + (9x)^2 cm = (13.97)^2 cm
i.e. x ==> 0.481 cm

16:9 Video Height i.e. 9x = 6.23 cm
16:9 Video Width i.e. 16x = 11.08 cm

Can you imagine the possibilities? You can pitch your current phone against any new phone you are about to purchase online, without visiting a store. You'd know exactly how big your Youtube videos would look, by drawing them on a piece of paper. The 16 Pro would be a definite upgrade from my current iPhone 13 mini when it comes to video media consumption.

Image without description