# Screen size info needed urgently

Discussion in 'MacBook Pro' started by jbrown, Jan 21, 2013.

1. ### jbrown macrumors 6502a

Joined:
Jul 7, 2002
Location:
London
#1
Hi

I am looking for the screen size for a Retina Macbook Pro 13".

I'm just talking about the visible image size. Not including the black band all away around.

I need the exact height and width - in inches or millimetres please.

Thanks a lot

Joined:
Jan 21, 2008
3. ### jbrown thread starter macrumors 6502a

Joined:
Jul 7, 2002
Location:
London
#3
Great!!! Thanks.

Just to confirm - this is displayed image size right? Imagine the screen image was pure white - height and width of that is what I'm after.....

4. ### Ploki macrumors 68020

Joined:
Jan 21, 2008
#4
yeah.

it's a 13.3" 16:10 ratio screen, you can easily calculate it yourself

5. ### jbrown thread starter macrumors 6502a

Joined:
Jul 7, 2002
Location:
London
#5
Isn't it 16:9?

And out of curiosity - how do you calculate it ( maths isn't my strong point )?

Again thanks

Joined:
Jun 25, 2012
#6
No, 16:10

7. ### Ploki macrumors 68020

Joined:
Jan 21, 2008
#7
Nope, only MBA 11" is 16:9. Everything else apple-laptop is 16:10. Been for a while now. (You can also calculate that from the resolution 2560*1600)

Pythagoras rule for right-angled triangle.

You have two known legs (16 and 10) which means the hypothenuse is (c^2=a^2+b^2) (look up right-angled triangle calculation)

Now these are ratios, the hypothenuse is 13.3"

math goes as follows:
c = square root of (16*16 + 10*10)
c =~18.9

Now we know c is 13.3 and that it is 18.9 in size compared to A and B...

so (13.3/18.9) * 16 for width
and (13.3/18.9) * 10 for height

Joined:
Oct 10, 2011
#8