This page shows your screen resolution the moment it loads: the size the browser reports in CSS pixels, the physical pixel resolution (CSS size multiplied by the device pixel ratio), the current size of your browser window (viewport), color depth and orientation. Resize the window and the viewport numbers update live.
It is useful when choosing wallpapers and screenshots, testing responsive web designs, filling in support forms or checking a new monitor or phone. Detailed browser and operating system information is listed below. Nothing is sent anywhere.
How to use the What Is My Screen Resolution tool
- Open the page; your screen details appear immediately.
- Read the screen resolution and the physical pixels.
- Resize the browser window to see the viewport size change.
- Copy the report if you need to send it to someone.
Why use ToolOrca What Is My Screen Resolution
- Screen resolution in CSS pixels
- Physical pixel resolution
- Live browser viewport size
- Device pixel ratio and color depth
- Orientation and browser details
- Copy the full report
CSS pixels vs physical pixels
High-density screens such as Retina displays, most phones and many laptops use several physical pixels for each CSS pixel, so text stays sharp. The device pixel ratio tells you how many: a phone reporting 390 × 844 with a ratio of 3 has a real panel of 1170 × 2532 pixels.
Operating system display scaling (for example 125% or 150% on Windows) and browser zoom also change the reported CSS size and ratio. Set zoom to 100% for the most accurate reading.
Common screen resolutions
Full HD is 1920 × 1080, QHD (1440p) is 2560 × 1440 and 4K UHD is 3840 × 2160. Laptops commonly report 1366 × 768, 1536 × 864 or 1440 × 900 in CSS pixels, and phones typically report between 360 and 430 CSS pixels wide.
Frequently asked questions
Why does my 4K monitor show a smaller resolution?
Because of display scaling. At 150% scaling, a 3840 × 2160 screen reports 2560 × 1440 CSS pixels with a pixel ratio of 1.5. The physical pixels line shows the real size.
What is the viewport?
The area inside the browser window where the page is drawn. It is smaller than the screen because of toolbars, tabs and the taskbar.
Does browser zoom change the result?
Yes. Zooming in makes CSS pixels larger, so the reported resolution goes down and the pixel ratio goes up. Reset zoom to 100% (Ctrl/Cmd + 0) first.
Is any information collected?
No. Everything is read and shown by your own browser; nothing is stored or sent.