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I understand this is a very novice question to ask but I just want to make sure I have a firm grasp on the concept(s)

Resolution is how many pixels displayed on a screen by height x width.

How does this relate to pixel per inch(es). I'm assuming bigger monitors have more ppi.

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Other things being equal, bigger monitors will have less pixels per inch. A bigger monitor means more inches, so fewer pixels per inch. – David Schwartz Jul 22 at 16:57

You are correct in saying that resolution is screen width x height (in pixels).

Pixels Per Inch (PPI), will actually get smaller as your screen gets bigger. PPI is a measure of pixel density. As the area a screen covers gets smaller, the pixels are more densely packed and so the PPI goes up.

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Which can make the image sharper? – Joseph Dec 17 '13 at 16:26
    
Typically, a higher density (higher res or smaller screen) will look better. – heavyd Dec 17 '13 at 16:33
    
Last question: how is PPI calculated – Joseph Dec 17 '13 at 16:47
    
For screens, the Wikipedia entry says it is the diagonal resolution/diagonal size – heavyd Dec 17 '13 at 16:56

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