Screen Resolution Checker
Check your screen's logical and physical resolution, device pixel ratio, and display category instantly — no software needed.
Detects HiDPI / Retina displays, reports the device pixel ratio, and identifies your display as HD, Full HD, 2K, or 4K.
Click the button below to detect your current screen resolution. Your browser screen data is sent securely for analysis.
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Physical Resolution
Reports the true pixel count of your display, accounting for device pixel ratio on HiDPI and Retina screens.
DPI Detection
Shows your device pixel ratio (DPR) — the multiplier between CSS pixels and physical pixels used by modern displays.
Aspect Ratio
Automatically detects your screen aspect ratio (16:9, 16:10, 4:3, 21:9) and categorizes your display as HD, Full HD, 2K, or 4K.
Frequently Asked Questions
What is my screen resolution?
This tool shows your logical resolution (what your OS uses for layout), physical native pixels, device pixel ratio, and a quick category like Full HD or 4K. If you use display scaling, logical resolution will often look lower than the panel's native spec — that is expected.
What is the device pixel ratio?
The device pixel ratio (DPR) is the number of physical pixels per CSS pixel. A DPR of 2 means the screen has 4× as many physical pixels as CSS pixels — common on Retina and HiDPI displays like modern MacBooks and high-end phones.
What is the difference between logical and physical resolution?
Logical resolution is what the browser uses for layout (CSS pixels). Physical resolution is the actual pixel count on the screen panel. On a MacBook Pro Retina, you might have 1440 logical pixels wide but 2880 physical pixels.
Why does my screen show a different resolution than expected?
Operating systems apply display scaling (DPI scaling) that changes the logical resolution. A 4K monitor set to 200% scaling will show a logical resolution of 1920×1080 even though the physical panel is 3840×2160.
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