What Is My Screen Size?
What Is My Screen Size? screen resolution display dimensions monitor size browser screenAbout this result
This browser-reported screen resolution is measured in pixels. Window size and display scaling can differ from this value.
What browser-reported screen size means
The result comes from the browser's window.screen object. Width and height are reported in CSS pixels for the display associated with this browser. A CSS pixel is a layout unit, not necessarily one physical hardware pixel. Operating-system scaling, browser zoom, and high-density screens can make those quantities differ.
Screen, viewport, and physical display size
Screen size describes the display coordinate space exposed to the browser. Viewport size describes the area currently available to the page inside the browser window. Physical size is normally measured diagonally in inches or centimeters. This tool does not infer viewport dimensions or physical diagonal size, so do not use it to select a monitor stand, laptop sleeve, or replacement panel.
Worked example
If the result is 1920 × 1080, the browser reports 1,920 CSS pixels across and 1,080 CSS pixels down. That is a 16:9 aspect ratio after simplifying 1920:1080. On a scaled high-density display, hardware may contain more physical pixels even though the browser reports these layout dimensions.
Assumptions and accuracy limitations
The value can change when a window moves to another monitor, display scaling changes, remote-desktop settings change, or a device rotates. Browsers may reduce precision for privacy protection. Foldable displays, virtual displays, mirroring, and multi-monitor arrangements can also produce results that do not describe an entire desk setup. Refresh after changing display configuration.
Common mistakes
- Calling this result the browser-window size
- Assuming CSS pixels equal physical panel pixels
- Treating width times height as screen area in square inches
- Using one visitor's result as a universal responsive breakpoint
Privacy and browser processing
The measurement is read by JavaScript in this browser and is not submitted to Awesome Tools. Screen characteristics can still contribute to browser fingerprinting when combined with many other signals; this page shows only the direct result and does not claim that the value is identifying by itself.
Screen Size FAQ
Why is this smaller than the resolution in display settings?
Display scaling can map multiple hardware pixels to one CSS pixel. Browser privacy behavior can also reduce reported precision.
Does browser zoom change the result?
Zoom changes page layout and viewport behavior, but the screen API's CSS-pixel result may not track zoom the same way across browsers.
Authoritative source and related tools
See the WHATWG HTML Standard's Screen interface for the browser API definition.