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
Private by design
All processing happens locally in your browser. Open DevTools → Network and you'll see zero file uploads. Ever.
Instant
No upload wait, no queue, no server round-trip. Results appear the moment you drop a file.
Free & unlimited
No accounts, no watermarks, no daily caps. Use it as many times as you like, forever.
Works everywhere
Desktop, tablet or phone — every tool is responsive and installable as a PWA for offline use.
Frequently asked questions
Everything you might want to know about screen size calculator.
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