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PPI Calculator

Enter a resolution and screen size — or pick a popular monitor — to see its pixel density, pixel size and real dimensions.

Pixel density— PPI

Dot pitch
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Screen size
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Screen size (inches)
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Aspect ratio
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Total pixels
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Pixels invisible from
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Why pixel density matters

Two monitors with the same resolution can look very different. A 1440p panel on a 27-inch screen has noticeably larger pixels than the same resolution on a 24-inch screen. Pixel density tells you how sharp text, icons and game details will look at a normal viewing distance, which is why it is one of the most useful numbers to compare before buying a monitor.

Higher density is not always better for gaming. More pixels need more graphics power for the same frame rate, and very dense screens often need operating system scaling, which some older apps handle poorly. Many players choose a balance such as 1440p at 27 inches.

Using the results

Not sure what resolution your current screen has? The screen resolution checker shows it instantly, or press “Use my screen resolution” above.

Frequently asked questions

What is PPI?

PPI means pixels per inch: how many pixels fit along one inch of the screen. Higher PPI means smaller pixels and sharper text and images at the same viewing distance.

How is PPI calculated?

Take the diagonal resolution in pixels — the square root of width² + height² — and divide it by the diagonal size in inches.

What PPI is good for a monitor?

Around 90–110 PPI is typical for desktop monitors used without scaling. Around 140 PPI and above looks very crisp at a desk but usually needs display scaling to keep text readable.

What does “pixels invisible from” mean?

It is the distance beyond which a single pixel takes up less than one arc-minute of your view, a common rule of thumb for when people with normal vision stop seeing individual pixels. It is an estimate, not a hard limit.

Is PPI the same as DPI?

They are often used interchangeably, but DPI originally describes printers and mouse sensors. For screens, PPI is the correct term.

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