I hope this is the correct section to ask 
Have been trying to find some kind of cheatsheet for baking in Blender, like memory usage from 1024x1024 to 16384x16384 for all available texture maps
I tried duckduckgo, brave and google with many and different queries but didn’t find a single image (cheatsheet)
You don’t have to cheat… you can compute it… 
Bytes used…
for usual formats:
x-resolution * y-resolution * ( bits per channel / 8 ) * channels used
8 bit RGB : x * y * 3
8 bit RGBA: x * y * 4
16 bit RGB : x * y * 2 * 3
16 bit RGBA: x * y * 2 * 4
for EXR:
x-resolution * y-resolution * res * channels used
with res=
float: 4
double: 8
( if my mind doesn’t tricked me )
it seems to work for few people, at least according to the likes but for me it doesn’t
I’m getting 1.5GB, unless I’m doing it incorrectly
I guess I’m getting more stupid each year x__x
That’s 1,610,612,736 bits, which is .2 GB, or 200 MB, which is correct (depending on your file format/compression etc, this will vary slightly.) For example, I have a 6800x3965 PNG I’m looking at right now that’s 101 MB. Your image is 2.48 times larger, and PNG compression has an efficiency of between 2-4 times, so the numbers add up 
I see, the math makes sense now, i guess the 12-16GB of RAM usage when baking is a Blender way of doing / issue
this kind of made it easier to understand
anyway thank you for your time, take care