What Is My Screen Size?
Instantly discover your screen resolution, viewport dimensions, and detailed display information. All measurements update in real-time.
Understanding Screen Size & Resolution
Screen size and resolution are fundamental aspects of your display that affect everything from image clarity to how much content you can view at once. Understanding these specifications helps you optimize your workspace and choose the right settings for your needs.
Key Display Concepts
Screen Resolution
The total number of pixels your display can show, expressed as width × height (e.g., 1920 × 1080). Higher resolution means more pixels and sharper images.
Viewport Size
The visible area of your browser window where web content is displayed. This is typically smaller than your screen resolution due to browser chrome and toolbars.
Device Pixel Ratio (DPR)
The ratio between physical pixels and CSS pixels. A DPR of 2x (common on Retina displays) means 4 physical pixels are used for every CSS pixel, resulting in sharper text and images.
Aspect Ratio
The proportional relationship between your screen's width and height. Common ratios include 16:9 (widescreen), 16:10, and 21:9 (ultrawide).
Common Screen Resolutions
Budget laptops, older monitors
Most common desktop/laptop resolution
Gaming monitors, high-end laptops
High-end displays, professional work
Professional creative displays
Productivity and immersive gaming
Popular Device Display Sizes
Smartphones
Tablets
Laptops
Desktop Monitors
Frequently Asked Questions
What is the difference between screen resolution and viewport size?
Screen resolution is your monitor's total pixel count, while viewport size is the visible browser content area, which is smaller due to browser UI elements.
Why does my resolution look different than my screen's native resolution?
You may have display scaling enabled (common on laptops) or your resolution might be set lower than native in display settings.
What does device pixel ratio mean for web browsing?
A higher DPR (like 2x on Retina displays) means websites and images appear sharper because more physical pixels render each element.
How do I change my screen resolution?
On Windows, right-click the desktop and select "Display settings." On Mac, go to System Preferences > Displays. On Linux, use your display settings or xrandr.
What resolution should I choose for gaming?
Use your monitor's native resolution for the sharpest image. If performance is poor, lower the resolution to 1080p or use in-game resolution scaling.
Explore More Display Tools
Explore our comprehensive suite of testing tools to optimize your device performance and display quality.
Refresh Rate Tester
Measure your display's actual refresh rate and understand your monitor's capabilities.
Dead Pixel Tester
Check your screen for dead or stuck pixels with various color patterns and tests.
Screen Bleeding Test
Test your display for backlight bleeding and uniformity issues with dark patterns.
Explore our complete collection of testing and optimization tools