What Is My Screen Resolution?
Your screen resolution, window size and pixel ratio, read straight from the browser.
1:1 pixel pattern
- Screen size (CSS pixels)
- Physical resolution (estimate)
- Usable screen area
- Browser window
- Device pixel ratio
- Color depth
- Orientation
- Color gamut
- HDR
Ready.
Every test runs inside your browser. Nothing you type, say, show or press is uploaded.
How to use this test
This page reads your screen resolution and the details around it: the size of the screen as the browser sees it, an estimate of the physical pixels after scaling, the size of this browser window, the device pixel ratio, the color depth, and whether the screen supports wide color or HDR. The numbers update when you resize the window or move it to another screen.
Just read the numbers; there's nothing to press. Drag the window to another monitor or change the browser zoom and watch them change. Open the 1:1 pixel pattern, full screen if you like, to check whether the image is being scaled.
What the results mean
The browser reports the screen in CSS pixels, which already include your display scaling. Multiplying by the device pixel ratio estimates the physical resolution: a 2560 × 1440 screen at 125% scaling reports 2048 × 1152 with a ratio of 1.25. Set browser zoom to 100% for the best estimate. The pixel pattern should look like even, fine stripes; shimmering waves or soft bands mean the image is being scaled.
Common questions
Why does it show a lower resolution than my monitor has?
Your operating system scales the desktop to make text readable, and the browser reports the scaled size. The estimated physical resolution line multiplies it back; with browser zoom at 100% it usually matches your screen's native resolution.
What is the device pixel ratio?
It's how many physical pixels make up one CSS pixel. 1 means no scaling; higher values are common on laptops, phones and high-resolution screens. Browser zoom changes it as well, which is why the physical resolution here is only an estimate.
How do I find my monitor's native resolution?
Check the monitor's specifications or its on-screen menu. Windows marks it as Recommended in the display settings, and macOS shows it in the Displays settings. The native resolution gives the sharpest picture.