Free Screen Resolution Calculator Online – Aspect Ratio, Megapixels & PPI
Calculate aspect ratio, megapixels, and PPI from screen resolution
Features
- Aspect ratio from width & height
- Total pixels and megapixels
- PPI (pixel density) from diagonal size
- Free, browser-based
- No signup required
Frequently Asked Questions
PPI (pixels per inch) measures pixel density — how sharp a display looks — calculated from resolution and physical diagonal screen size.
No, it's optional — without it you'll still get aspect ratio, total pixels, and megapixels, just not PPI.
Roughly 300 PPI or higher is generally considered sharp enough that individual pixels aren't distinguishable at normal viewing distance on phones; larger displays viewed from farther away (like TVs) can look sharp at a lower PPI.
Yes — enter each monitor's resolution and size to compare their aspect ratio and pixel density side by side.
No — all calculations happen instantly in your browser.
How to Use Screen Resolution Calculator
Using Screen Resolution Calculator is simple and free. No sign-up required.
- Enter the screen width and height in pixels.
- Optionally enter the diagonal size in inches.
- Click 'Calculate' to see aspect ratio, megapixels, and PPI.
About Screen Resolution Calculator
Screen Resolution Calculator computes aspect ratio, total pixel count, megapixels, and pixel density (PPI) from a screen's resolution and physical size. It's useful for comparing monitors or phone displays before buying, checking whether a resolution matches a standard aspect ratio like 16:9, or figuring out how sharp a display will actually look based on its pixel density.
All iLoveToolZone tools work directly in your browser — no software installation or account required.