What is aspect ratio?

Aspect ratio is the proportional relationship between screen width and height, expressed as x:y. Common ratios include 16:9 (HD TV), 4:3 (traditional monitor), 21:9 (ultrawide), and 16:10 (some laptops).

PPI (Pixels Per Inch) measures pixel density. Higher PPI means sharper display. Desktop monitors typically range 100-150 PPI, while phone screens range 300-500 PPI.

What are 1080p and 4K resolutions?

1080p is 1920x1080 (about 2MP). 4K UHD is 3840x2160 (about 8.3MP), 4 times 1080p. 8K resolution is 7680x4320.

How to calculate screen size?

Screen size is the diagonal measurement in inches. Use Pythagorean theorem: diagonal = sqrt(width^2 + height^2). Then convert pixels to inches by dividing by PPI.

Free Online Resolution Calculator

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Updated: 2026-07-11

🧮 Resolution Calculator

Width (px)

Height (px)

Screen size (in, optional)

PPI (optional)

Aspect Ratio--

Total Pixels--

Megapixels--

PPI--

Diagonal (in)--

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What is Resolution Calculator?

Resolution Calculator is a free online tool that runs entirely in your browser. No download or signup needed — enter screen width and height to get aspect ratio, total pixels, PPI and diagonal size instantly. All data is processed locally.

Use Cases

Verify screen resolutions during design or development
Calculate aspect ratios for video production
Compare display specifications when shopping
Quick resolution calculations on mobile

Key Features

Completely Free: No registration, no limits
Privacy Safe: Data never leaves your browser
Cross-Platform: Any modern browser
Zero Dependencies: Open and use

📐 Resolution Calculator

🧮 Resolution Calculator

What is Resolution Calculator?

Use Cases

Key Features

About Resolution Calculator

How to use Resolution Calculator?

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