Tell me more ×
Android Enthusiasts Stack Exchange is a question and answer site for enthusiasts and power users of the Android operating system. It's 100% free, no registration required.
up vote 3 down vote favorite

I'm not asking the diagonal values, but the length and breadth ones of the Nexus 7. And only of the LCD screen, not the entire hardware.

share|improve this question

4 Answers

up vote 5 down vote accepted

The screen size is 151mm * 94mm

http://forum.xda-developers.com/showthread.php?t=1760938

share|improve this answer
up vote 5 down vote

You can always use some mathematics to obtain screen size:

X = sqrt ( Z^2 / (1 + (VR/HR)^2) )

where:

sqrt = Square Root √‾‾‾

X = screen width

Z = diagonal screen size (7" for Nexus 7)

VR = vertical resolution

HR = horizontal resolution

which for Nexus 7, we have:

Z = 7"
VR = 1280
HR = 800

so:

X = sqrt ( 49 / 3.56)

X = 3.71 inches ~ 94mm

Y = (1280/800) * X = 1.6X

Y = 5.936 inches ~ 151mm

so we have 151mm x 94mm which Peanut has linked to.

share|improve this answer
This assumes square pixels, which isn't always the case (though it is on the Nexus 7). You want to use the aspect ratio instead. – derobert Nov 30 '12 at 11:12
does this work for alternative pixel arrangements, like PenTile? – Lie Ryan Dec 2 '12 at 18:36
@derobert Thanks for the point, OK, so we can simply replace VR/HR with aspect ratio. – yrajabi Dec 5 '12 at 7:21
@LieRyan Yes, in the cases where pixels are not square, we can use aspect ratio (e.g 4:3 or 16:9) instead of actual resolution values (e.g 1280x800). – yrajabi Dec 5 '12 at 7:24
up vote 2 down vote

So you want to know the display area ..

(A.) The non-masked (clear) area of the front face:

A simple metric ruler, and ASUS Nexus 7, gives you ..

Answer: 152mm x 95mm

OR

(B.) The area of active pixels, on the IPS LCD display:

display pitch: 216 dpi (pixels per inch, leading edge to leading edge)

pixel size: 96% of pitch (guesstimate, without engineering drawings)

pixel geometry: square (identical height, width)

display size (in pixels): 1280 x 800

screen area: (mathematical)

 => (height - 1) x pitch + pixel_width by (width - 1) x pitch + pixel_width
 => (1279 x 0.1175 + 0.1128) by (799 x 0.1175 + 0.1128)
 => 150.40 by 94.00 mm

Answer: 150.4mm x 94.0mm

ADDENDUM:

Actual diagonal width, for ASUS Nexus 7 display area:

  => square root ( height squared + width squared )
  => square root ( 150.40 squared + 94.00 squared )
  => square root ( 22,620.16 + 8,836 ) mm
  => 177.36 mm
  => 177.36 / 25.4 (convert to inches)

Answer: 177.4mm or 6.98 in

share|improve this answer
up vote 2 down vote

try downloading the Screeninfo app from the Google Play store for useful screen info. This works on any other Android device as well.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.