JavaScript Display Calculator

Solve for:

Distance (useful for existing monitors)
Size (useful for finding smallest suitable monitor of given resolution)
Resolution (useful for finding highest resolution monitor of given size)

Input		Results
Pixel dimensions:	x		x
Aspect ratio:
Size (inches):
Visual Acuity:	20/	PPI:
Distance (inches):
Cycles per degree:
Screen dimensions (inches):			x
Screen dimensions (mm):			x

This calculator is designed to calculate the following:

Pixel density of an existing monitor, and maximum viewing distance of that monitor for a given visual acuity
Minimum size for a monitor of a given resolution and viewing distance, with a given visual acuity
Maximum resolution for a monitor of a given aspect ratio, size, and viewing distance, with a given visual acuity
New: The effects of different standards of realism on these. Use 30 cycles per degree (the default) for Apple's Retina Display standard (the point at which someone with 20/20 vision cannot distinguish individual pixels), or 60-155 cycles per degree for optimum realism per NHK's research. Also note that 2 pixels constitute 1 cycle, and that NHK's research does not assume 20/20 vision (therefore, it may be best to set visual acuity to 20/20 when adjusting cycles per degree).

All numbers given are maximums or minimums, and are only distances at which individual pixels will no longer be distinguishable. For some applications, the display may need to be larger, lower resolution, or mounted closer to the viewer to be comfortable, whereas for other applications, the display may be smaller, higher resolution, or mounted further from the viewer, as items on screen are large enough that the added resolution is of no benefit.

This calculator is written by Eric Rucker, using resources from Wikipedia, Jill Bechtold, and Demo Source and Support. It is licensed under Sam Hocevar's Do What The Fuck You Want To Public License version 2.

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE 
                    Version 2, December 2004 

 Copyright (C) 2004 Sam Hocevar  

 Everyone is permitted to copy and distribute verbatim or modified 
 copies of this license document, and changing it is allowed as long 
 as the name is changed. 

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE 
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 

  0. You just DO WHAT THE FUCK YOU WANT TO.