What Is My Screen Size

What Is My Screen Size is a free tool that provides accurate information about your screen size, resolution, pixel ratio, and aspect ratio without collecting or storing any data. It operates entirely in your browser, measuring screen size diagonally. Users can access live inner width and height, visualViewport, safe-area visualizer, and width simulator. The tool allows for reading screen.width and screen.height, comparing with the viewport, and viewing physical pixel dimensions. It also provides live devicePixelRatio (DPR) readings and comparisons between CSS and physical pixels. Designed for designers and front-end developers, it includes viewport debugging, CSS units, rem/px math, and breakpoints. Additionally, users can discover their monitor's physical dimensions, model information, and detailed display specifications. The tool calculates pixel density (PPI) instantly and offers recommendations for Windows/macOS scaling based on monitor resolution and size. It also helps calculate minimum desk width and depth for dual monitor setups and suggests optimal seating distances for monitors and TVs based on screen size.