What is my screen resolution?
Every figure is read from your own browser and updates live as you resize, rotate or zoom. Nothing is sent anywhere.
Your resolution, and why there are two numbers
This page reads your display straight from your browser - nothing is uploaded and nothing is stored. It shows two resolutions, and the difference between them is the thing almost every other tool gets wrong.
- Hardware pixels - what your panel physically has. This is the number on the box.
- CSS pixels - what websites are shown. On a scaled display this is smaller.
On a 4K laptop running at 200% scaling, the browser reports 1920 x 1080. A tool that prints that as "your screen resolution" tells somebody with a 4K display that they own a 1080p one. Multiply by the pixel ratio and you get the real figure, which is what the large number above shows.
What each reading means
| Reading | What it tells you |
|---|---|
| Screen resolution | The panel's true pixel count |
| CSS resolution | What web pages are laid out against |
| Browser window | The visible page area, excluding browser chrome |
| Usable screen | The desktop minus taskbars and docks |
| Pixel ratio | Hardware pixels per CSS pixel. 1 means unscaled. |
| Aspect ratio | The shape - 16:9 for most monitors, 16:10 or 3:2 for many laptops |
| Colour depth | Bits per pixel. 24 is standard; 30 means a 10-bit panel. |
Common questions
Why is my browser window smaller than my screen?
The window is only part of the desktop, and the viewport excludes the address bar, bookmarks bar and any scrollbar. A maximised window on a 1920-wide screen typically reports a viewport around 1920 x 950.
My pixel ratio is 1.25 or 1.5 - is that wrong?
No. Windows offers 125% and 150% scaling, which produce exactly those. A fractional ratio on a desktop can also mean the page is zoomed - browser zoom is implemented by changing this value. Press Ctrl+0, or Cmd+0 on a Mac, to reset it.
Is this my monitor's native resolution?
It is the resolution your system is currently running at, which is normally but not always the native one. If it looks lower than the panel's rating, check the display settings - running a monitor below native makes everything slightly blurry, because the panel has to interpolate.
Why does it change when I move the window to another monitor?
Because it is reading the display the window is currently on. Two monitors of different densities give different pixel ratios, and the figures here update as the window moves.
Related checks
If you are diagnosing a display rather than just looking up a number, our dead pixel test finds stuck subpixels and our refresh rate test measures how many frames a second your monitor is actually presenting.
