What Is My Screen Resolution
See your screen resolution, viewport size and pixel density.
What this page shows
Your screen size as the browser sees it, the physical pixel count of the panel, the viewport your browser window currently offers a web page, and the device pixel ratio linking them. Resize the window and the viewport figure updates live โ handy for checking breakpoints while designing.
CSS pixels versus the panel
Modern screens report two truths. The panel may be 2560ร1600 physical pixels, but at 200% interface scaling the operating system presents it as 1280ร800 CSS pixels, and everything in the browser works in those. Neither number is wrong: the physical count is what a screen-replacement shop needs; the CSS count is what web design responds to.
That is why a phone with a "1170ร2532" screen reports a 390-pixel-wide viewport โ a device pixel ratio of 3. It is also why 1366ร768 laptops and 1920ร1080 monitors still dominate design targets even as panels sharpen: scaling keeps the CSS sizes familiar. Checking what a size means as a shape rather than a count is the aspect ratio calculator's job, and the refresh rate test covers the panel's speed rather than its size.
Frequently asked questions
How do I find my screen resolution?
It is shown at the top of this page, read live from your browser. No software needed.
Why does this show less than my monitor's advertised resolution?
Interface scaling. A 4K panel at 150% scaling reports 2560ร1440 CSS pixels to the browser. Both figures are shown here โ the physical count is the advertised one.
What is device pixel ratio?
How many physical pixels the panel packs into one CSS pixel โ 1 on standard screens, 2 on Retina/HiDPI displays, up to 3 or more on phones. It is why images need 2ร versions to look sharp on good screens.
What resolution do most people use?
1920ร1080 remains the most common desktop resolution worldwide, with 1366ร768 still significant on older laptops, and 360โ414 CSS pixels the typical phone viewport width.