Resolution Calculator
Calculate PPI, aspect ratio, and megapixels from dimensions
Resolution Calculator is a free online tool from BrowserUtils that calculate ppi, aspect ratio, and megapixels from dimensions. It runs entirely in your browser — your data never leaves your device. No account required.
16:9
2.07 MP
2,073,600
91.79
How to use Resolution Calculator
- 1 Paste or type your input into the editor above.
- 2 The tool processes your data instantly — right in your browser, with nothing sent to a server.
- 3 Copy the result with one click or continue editing your input.
About Resolution Calculator
Free online resolution calculator. Calculate pixels per inch (PPI), aspect ratio, and megapixel count from screen or image dimensions. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
Resolution Calculator specs
- Runtime
- 100% client-side (browser)
- Cost
- Free — no account, no rate limits, no usage caps
- Browser support
- Chrome 90+, Firefox 88+, Safari 14+, Edge 90+
- Part of
- 299 developer tools on BrowserUtils (100% client-side)
Questions
How is PPI calculated?
PPI (pixels per inch) is calculated as the diagonal resolution divided by the diagonal size in inches: PPI = √(width² + height²) / diagonal inches.
How are megapixels calculated?
Megapixels equal the total number of pixels (width × height) divided by 1,000,000. For example, a 1920×1080 display has about 2.07 megapixels.
What is a good PPI for a computer monitor?
Standard desktop monitors range from 90 to 110 PPI. "Retina" or HiDPI displays reach 200+ PPI. Higher PPI means sharper text and images, but requires more GPU power to drive the extra pixels.
What is the difference between PPI and DPI?
PPI (pixels per inch) measures screen pixel density. DPI (dots per inch) measures print resolution. They are often used interchangeably, but PPI applies to screens and DPI applies to printers.
Does this resolution calculator work offline?
Yes. All calculations run in your browser using JavaScript. No data is transmitted, and you can use the tool without an internet connection after the page loads.
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