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What Is My Screen Resolution?

Runs on your device. Nothing is sent.
Your screen resolution…

Display details

Updates live when you resize the window, rotate the device or move the window to another screen.

Browser zoom changes these numbers - press Ctrl+0 (⌘0 on a Mac) to reset it first.

Check your refresh rate (Hz) →

Pixel density (PPI)

Enter the screen's diagonal size (it's on the box or spec sheet) to see how sharp it is.

See your screen resolution in real pixels, plus display scale, browser window size, aspect ratio, HDR and color gamut, and work out its PPI.

Find out your screen resolution instantly. The page shows the real number of pixels on your display, the common name for it (Full HD, QHD, 4K and so on), the display scale your system uses, the size of the browser window, the aspect ratio, color depth, color gamut and whether HDR is on. Enter the screen size in inches or centimetres to get its pixel density (PPI). Everything updates as you resize the window or rotate your phone, and you can copy all the details in one click - handy for support tickets or buying a new monitor.

Frequently asked questions

Why does my 4K screen show 1920 × 1080 somewhere?
Systems scale things up on sharp screens so text stays readable. At 200% scale a 3840 × 2160 screen behaves like 1920 × 1080 for websites - those are CSS pixels. The big number at the top multiplies them by the device pixel ratio to give the real, physical resolution.
What is the device pixel ratio?
How many physical pixels make up one CSS pixel. 1 is a standard screen, 1.25 or 1.5 is common on Windows laptops, 2 on Retina Macs and many phones, and 3 or more on high-end phones.
Why is the browser window smaller than the screen?
The window leaves out the taskbar or dock, the browser's tabs and address bar, and any space taken by other windows. The usable screen area is what's left after the taskbar or dock.
What is a good PPI?
Desktop monitors are usually 90-110 PPI at 1080p or 1440p and around 160 PPI at 27-inch 4K. Laptops tend to be 130-230 PPI, and phones 400-500. Higher means sharper text, but you also sit closer to smaller screens.

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