Screen Size Calculator
Compute PPI, physical dimensions, and area from resolution + diagonal.
See how it works
Watch a quick simulation of this tool in action — no file needed.
How to use Screen Size Calculator
Follow these steps — everything happens instantly in your browser.
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Step 1. Enter screen width and height in pixels.
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Step 2. Enter the diagonal size in inches.
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Step 3. Or pick a common device preset (iPhone, MacBook, monitor).
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Step 4. See PPI, physical dimensions, area, and aspect ratio.
Why use this tool
Frequently asked questions
Everything you might want to know about screen size calculator.
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