Display Resolution Checker
Check your display resolution and understand the difference between CSS and physical pixels.
💡 What This Means
Your display has standard pixel density where 1 CSS pixel = 1 physical pixel.
Understanding Display Resolution
Display resolution describes the number of distinct pixels that can be displayed. It's typically given as width × height, like 1920×1080. Higher resolutions provide sharper images and more workspace, but also require more graphics processing power.
Modern high-DPI displays complicate resolution understanding. A "1920×1080" MacBook may have twice the physical pixels, making content appear sharper at the same logical size.
CSS Pixels vs Physical Pixels
CSS pixels are what web developers work with—they represent a consistent visual size across devices. Physical pixels are the actual display elements. On a 2x Retina display, each CSS pixel uses 4 physical pixels (2×2 grid).
HiDPI and Retina Displays
Apple's Retina and other HiDPI displays pack more pixels into the same physical space. This makes text and images appear smoother. The device pixel ratio indicates this multiplier—2x means twice the pixels per dimension.
Choosing Display Resolution
Balance resolution with your needs. Higher resolution means more workspace but smaller UI elements. Scaling options let you keep UI readable while benefiting from sharp rendering.
Resolution for Design Work
Designers should understand both logical and physical resolution. Export images at 2x or 3x for HiDPI displays. Test designs on various pixel ratios to ensure consistent appearance.