Check your screen resolution
Your screen size in pixels, the physical pixel count behind it, and a window size that changes as you zoom.
- Runs on your device
- No sign-up
- Works offline
Measuring the refresh rate for about one second.
| Available screen, CSS pixels | — |
|---|---|
| Aspect ratio of the screen | — |
| Color depth | — |
| Orientation | — |
| HDR, dynamic range high | — |
| Color gamut | — |
| Touch points | — |
Physical pixels are the screen width and height times the device pixel ratio, rounded. The browser reports the ratio, so the figure is an estimate. HDR and gamut come from the browser’s own media query, which can differ from what your display can show.
How to check your screen resolution
- Open the page. The screen size shows at once, with no button to press.
- Resize the window or zoom the page, and watch the browser window figures change.
- Wait a second for the refresh rate, then press Copy all to paste the details.
Questions
Why do the physical pixels differ from the screen size?
Websites measure in CSS pixels, a unit the browser scales for you. The device pixel ratio says how many physical pixels make up one CSS pixel. Operating system scaling, such as 200 percent on a high-density screen, raises that ratio, so a 3840 × 2160 panel at 200 percent reports 1920 × 1080 CSS pixels.
Why does the number change when I zoom the page?
Browser zoom changes the pixel ratio and the window size in CSS pixels, but not the physical screen. Press Ctrl+0, or Cmd+0 on a Mac, to return to 100 percent.
What is the difference between the screen, the available screen and the window?
The screen is the whole display. The available screen leaves out areas the system reserves, such as the taskbar or dock. The browser window is only the page area, without tabs, address bar or bookmarks bar.
How is the refresh rate measured, and can I trust it?
The page counts animation frames for about one second, so the figure is an estimate. A background tab, battery saver mode or a busy computer can make the browser draw fewer frames than the screen can show.