How to determine your screen resolution

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Friday, 25 July 2014

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How to determine your screen resolution

The resolution of monitor screens is usually measured in dots per inch (dpi). Obviously, the higher this number is, the more pixels will fit in a given region of the screen and so the higher the detail that can be displayed. Many fonts take into account the screen resolution for best results in balancing character appearance with readability.

If you don't know what the resolution of you screen is you can try the xdpyinfo command to find out:

 xdpyinfo | grep resolution

If that does not work but you know your monitor's "dot pitch" you can calculate the resolution in dpi by dividing 25.4 by the dot pitch. For example, if your monitor displays pixels of diameter .28 mm (a common size), your resolution is 25.4/.28=90.7 dpi, i.e., closer to 100 dpi than to 75.

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HR-Net Group, January 22, 1996