I'm not sure if the reduction percent has been measured yet for the PS4 Slim so this thread either announces or confirms it.

Using the size comparison images I worked out these dimensions.

PS4 - (w)275mm x (d)273mm(303mm overall) x (h)55mm = 4,129,125mm³

PS4 Slim - (w)259mm x (d)246mm(268mm overall) x (h)40mm = 2,548,560mm³

That gives us a reduction of 38.3%, similar to the recent reduction of the XB1.

Note: The sizes I gave for depth are not the overal depth. Because of the shape the PS4 sticks out 30mm more and the Slim 22mm more. However using the dimensions for the top side with console height gives us the volume because the front and back of the console slant at the same angle.

You sure about that? More than 20%? okay I can buy that.
40% sounds like alot, not sure if its that much.

Then again XB1 slim was only like 36% right? dispite the marketing for it saying 40%.

Maths can't be trusted. We need to duct tape them and submerge them in water. XD

Was shrinkage accounted for???

Did you just do an edit. I could of sworn I read something different. I clicked quote and the whole context of your post changed on reply page lol

But when will it be portable?

X1 was a pretty big console to begin with so a 40% reduction will always look like a bigger reduction vs ps4. So I wouldnt doubt it

lol that would be way more accurate. I didn't account for the curved corners.

I typically edit alot of posts... for spelling mistakes or wrong choice of words ect.

I dont think I did with this one though.

..... you want to waterproof your console and test it out for us? :p

Brave man.