Practical measurement guide
Resolution to PPI Calculator
Calculate pixels per inch from screen resolution and diagonal size.
Resolution to PPI Calculator estimates display dimensions from user-entered screen measurements; it does not rely on branded product specs.
in
Try
91.79 PPI
√(1920² + 1080²) ÷ 24 = 91.79 pixels per inch
What this screen calculator does
This calculator uses the screen diagonal and aspect ratio entered by the user. It does not use branded specifications or invented device dimensions.
Example result
A 27-inch display in the selected ratio is approximately 23.53 inches wide and 13.24 inches tall, before bezels or casing.
Screen measurement formula
Screen size is diagonal. Width and height are calculated from the diagonal and the width-to-height ratio using right-triangle geometry.
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Frequently asked questions
Does the result include the bezel?
No. The calculation estimates the visible display area, not the frame, casing, stand, or mount.
Is screen size measured diagonally?
Yes. Advertised screen size is normally the diagonal measurement.
Can two screens with the same diagonal have different widths?
Yes. Different aspect ratios produce different width and height values.