Screen Resolution Checker
Check your screen size, viewport and pixel ratio.
Your screen resolution
Values update live when you resize the window, zoom or move it to another monitor. Screen size is reported in CSS pixels; multiply by the device pixel ratio to get physical pixels.
About this tool
Screen Resolution Checker shows the resolution of your display, the size of the browser window and the device pixel ratio. Web designers use it to test layouts, and support teams use it to learn about a visitor’s screen.
How to use Screen Resolution Checker
- Open the page to see your screen details.
- Resize or zoom the window to watch values update.
- Share or note the numbers you need.
Questions people ask
Why is the screen size smaller than my monitor’s resolution?
Browsers report CSS pixels. With 150% display scaling, a 2560×1440 monitor reports 1707×960. Multiply by the device pixel ratio to get physical pixels.
What is device pixel ratio?
It is the number of physical pixels per CSS pixel. Most phones have 2 or 3; a standard desktop monitor has 1.
What is the viewport?
The viewport is the visible area of the web page inside the browser window, which media queries in CSS respond to.