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Screen Size & PPI Calculator

Find a display’s pixel density, physical dimensions and pixel size from its diagonal.

Browser processingEditable exampleCopy · download · print

1. Set up your calculation

Assumes square pixels and the full active display diagonal. It does not measure a bezel or browser CSS density. PPI differs from device pixel ratio and operating-system scaling.

2. Review & use your result

Review the example inputs, then use calculate display.

Report / export preview

Generated file contents

Using Screen Size & PPI Calculator

Find a display’s pixel density, physical dimensions and pixel size from its diagonal.

Enter horizontal pixels and vertical pixels. Try the example to see the format.
Calculate display and review the result, including the assumptions shown below the inputs.
Copy, download or print your result. Editing an input clears the previous result.

Example

The included example: Pixels per inch (PPI) — 91.78779875; Active width (inches) — 20.91781289.
Change the inputs and generate a new result to compare it.

Questions & answers

How do I use this tool?

Find a display’s pixel density, physical dimensions and pixel size from its diagonal. Load the editable example, replace its values and use the main action button.

What should I check before using the result?

Assumes square pixels and the full active display diagonal. It does not measure a bezel or browser CSS density. PPI differs from device pixel ratio and operating-system scaling.

Are my entries saved?

Processing runs in your browser without a tool account or saved history. Download your result to keep a copy. Website advertising follows our privacy information.

Can I export or print it?

Copy and file download are available after generating a result. Print produces a clean copy of the visible result; use your browser’s Save as PDF option if needed.

Is PPI the same as browser pixels?

No. PPI describes physical display pixels per inch. Browser CSS pixels depend on zoom, operating-system scaling and device pixel ratio, which this calculation does not measure.