What Is My Screen Size?
Instantly check your screen resolution, viewport size, and display specifications
Your Screen Resolution
pixels
📺 Screen Information
🪟 Browser Viewport
✨ Display Type
📱 Device Category
Check More Device Information
Explore your complete system specifications
Advertisement Space
728x90 or 336x280 ad unit
About Screen Size and Resolution
Your screen size and resolution determine how much content you can see and how sharp it appears. Screen resolution is measured in pixels (width × height), indicating the total number of individual points of light your display can show.
Understanding Screen Resolution
Common screen resolutions include 1920×1080 (Full HD), 2560×1440 (2K/QHD), and 3840×2160 (4K/UHD). Higher resolutions provide sharper images and more screen real estate but require more processing power.
Viewport vs. Screen Size
Your viewport is the visible area of your browser window, while screen resolution is your entire display. The viewport is typically smaller than your screen resolution because of browser toolbars, operating system taskbars, and window borders.
Pixel Ratio (Retina/HiDPI)
Modern displays often have a pixel ratio greater than 1x, meaning physical pixels are smaller than CSS pixels. A 2x pixel ratio (Retina display) uses 4 physical pixels for every 1 CSS pixel, resulting in sharper text and images. This is common on smartphones, tablets, and high-end laptops.
Why Check Your Screen Size?
- Optimize websites and applications for your display
- Choose the right wallpaper or background image size
- Verify monitor specifications when troubleshooting
- Determine if your device supports certain resolutions
- Check if you're getting true Retina/HiDPI quality