Screen Resolution Checker - Find My Display Screen Pixels and Density
Instantly find your display hardware resolution, logical CSS screen width and height, device pixel ratio (DPR), color depth, and viewport dimensions. Includes an interactive aspect ratio calculator.
✓ 100% Free & Unlimited✓ 100% Browser Local & Private✓ No Registration Required
How to use Screen Resolution Checker Online
Step 1: Open the tool to view your real-time physical screen resolution and browser viewport sizes.
Step 2: Check your device pixel ratio (DPR), color depth, and responsive orientation type.
Step 3: Use the custom calculator to compute megapixels and aspect ratios for any pixel dimensions.
Frequently Asked Questions
What is the difference between Physical Resolution and Viewport Size?
Physical resolution is the actual number of pixels on your hardware screen (e.g., 3840x2160 for 4K). Viewport size is the logical CSS pixel space available in your browser window, which changes when you resize the window or zoom in.
What is Device Pixel Ratio (DPR)?
Device Pixel Ratio is the ratio of physical pixels to logical pixels on your screen. High-density screens (like Apple Retina or Samsung QuadHD) use a DPR of 2.0x or 3.0x to render text and icons with supreme sharpness.
How does the aspect ratio calculator work?
Enter any width and height dimensions, and our tool uses the Greatest Common Divisor (GCD) mathematical formula to reduce the fraction to standard aspect ratios (e.g. 16:9, 16:10, 4:3) and compute megapixels.