PPI & Screen Size Calculator
Calculate PPI, physical screen dimensions, and display area.
PPI & Screen Size Calculator
Screen inputs
Presets
Results
PPI
109
108.8 exact
- Pixels per cm
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- Total pixels
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- Physical width
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- Physical height
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- Display area
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- Aspect ratio
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Calculated estimates based on the entered diagonal and resolution.
PPI comparison
109 · Your screen
Common pixel density values for reference. No quality score.
Screen size comparison
Outlines use calculated physical proportions.
Guide
How to use
01
Enter screen size
Enter the display's diagonal size in inches or centimeters.
02
Enter resolution
Enter horizontal and vertical pixel resolution.
03
Check PPI and dimensions
View calculated PPI, physical width and height, display area, and aspect ratio.
04
Compare screens
Compare different screen sizes and resolutions to see how PPI and physical dimensions change.
About
About PPI
PPI (pixels per inch) describes how densely pixels are packed across a display. The same resolution can produce different PPI values on different screen sizes.
What is PPI?
PPI is calculated from the screen's pixel resolution and diagonal size. Higher PPI means more pixels are packed into each inch, but perceived sharpness also depends on viewing distance, scaling, content, and visual acuity.
FAQ
PPI Calculator FAQ
01What is PPI?
PPI means pixels per inch. It describes how densely pixels are packed into a screen.
02How is PPI calculated?
PPI is calculated from the screen's pixel resolution and diagonal size: the diagonal pixel count is divided by the diagonal screen size in inches.
03Does higher PPI mean a sharper screen?
Higher PPI can allow finer detail, but perceived sharpness also depends on viewing distance, scaling, content, and other factors.
04How do I calculate the size of a screen from its resolution?
Resolution alone is not enough. You also need the screen's physical size or another physical measurement.
05Can this calculator measure my actual screen size?
No. Enter the diagonal size and resolution to calculate estimated physical dimensions.
06What is the difference between PPI and DPI?
PPI normally describes pixel density on a digital display. DPI is more commonly used for dots produced by printers.
07Why can two 4K monitors have different PPI?
If they have the same resolution but different physical sizes, the pixels are spread over different areas, resulting in different PPI.