Screen Size Calculator: How to Use It, Tips and FAQs

Published 6 November 2026 by Kloora Tools

Quick answer: Screen Size Calculator: Find the screen diagonal, width, height and pixel density from resolution and size. Everything runs in your browser, so nothing you enter is uploaded or stored.

Looking for a quick, free way to use a screen size calculator? Find the screen diagonal, width, height and pixel density from resolution and size.

What the Screen Size Calculator does

Find the screen diagonal, width, height and pixel density from resolution and size. Free, instant and private. No signup, no download. It runs in your browser, so what you type stays on your device.

How is PPI calculated? PPI = diagonal pixels / diagonal inches, where diagonal pixels = sqrt(width squared + height squared).

How to use it, step by step

1. Enter your values in the fields.
2. The results update instantly as you type.
3. Note or copy the numbers you need.

Open the Screen Size Calculator in a new tab, follow these steps and keep this page beside it.

Questions this tool answers

Where can I use a free ppi calculator?

Use the Screen Size Calculator. Find the screen diagonal, width, height and pixel density from resolution and size.

Where can I use a free pixel density calculator?

The Screen Size Calculator covers this. Enter your details, read the result and compare it with your own case. Phones are often 400 or more. Monitors are around 100 to 160.

Where can I use a free monitor size width height calculator?

The Screen Size Calculator covers this. Enter your details, read the result and compare it with your own case. Yes. It is free, needs no signup and works on any device.

Who it helps

The Screen Size Calculator is made for students, shop owners, job holders and anyone who needs a quick number without opening a spreadsheet. It works on a phone, a tablet and a computer.

What you get

• Instant results
• Free, no signup
• Runs in your browser, nothing is uploaded
• Works on phone and desktop

Tips for good results

• Check that each number is in the unit the field asks for before you read the answer.
• Round only at the end. Rounding inside the steps can shift the final figure.
• Treat the result as an estimate for planning. For a legal, tax or medical decision, confirm it with a professional or the official source.

Try it now

Open the free Screen Size Calculator. If you need something related, browse the Kloora Tools home page or the tools listed at the end of this guide.

Frequently asked questions

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