A screen resolution tool detects your monitor’s resolution and pixel density (DPI/PPI), showing your exact display specs in one click.
A screen resolution tool detects your monitor’s resolution and pixel density (DPI/PPI), showing your exact display specs in one click. Our screen resolution checker is built on the same core what is my screen resolution screen dpi checker monitor resolution test and is trusted by students, professionals and everyday users who need a fast, accurate result. Because every calculation runs locally in your browser, there is no waiting, no sign-up and no limit on how often you use it.
Physical Resolution vs. CSS Viewport Resolution
Modern Retina and HiDPI displays use a Device Pixel Ratio (e.g. 2x or 3x scale), rendering high-density visuals while maintaining standard CSS viewport dimensions for layout.
Calculating Display Pixel Density (PPI / DPI)
PPI (Pixels Per Inch) = √(Width² + Height²) ÷ Diagonal Screen Size in inches. Higher PPI produces sharper text and crisper graphics.
Aspect Ratio and Color Depth Detection
Detect standard 16:9, 16:10, 21:9 ultrawide aspect ratios and 24-bit/30-bit color depths supported by your current browser window.
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100% Free, Instant & Private. All computations run directly in your browser sandbox without sending personal data to any external server.