Understanding Screen Resolution
What is Resolution?
Screen resolution refers to the number of pixels displayed on your screen, expressed as width × height. Higher resolutions mean more pixels, resulting in sharper images and more screen real estate.
What is DPI/DPR?
Device Pixel Ratio (DPR) indicates how many physical pixels are used to display one CSS pixel. A DPR of 2 means 4 physical pixels per logical pixel, making text and UI elements look significantly sharper.
Common Display Standards
| Standard Name | Resolution | Aspect Ratio | Target Device |
|---|---|---|---|
| HD | 1280 × 720 | 16:9 | Tablets, Laptops |
| Full HD (FHD) | 1920 × 1080 | 16:9 | Core Standard |
| Quad HD (QHD) | 2560 × 1440 | 16:9 | Gaming Monitors |
| Ultra HD (4K) | 3840 × 2160 | 16:9 | Smart TVs, Creative |
| 5K UHD+ | 5120 × 2880 | 16:9 | Design Displays |
Frequently Asked Questions
Why is my detected resolution different from my monitor's native resolution?
This often occurs due to display scaling in your OS settings (like Windows 125% or 150%). Scaling makes UI elements readable on high-res screens but reduces the logical resolution. Check your OS display settings to verify native versus scaled values.
How accurate is the refresh rate measurement?
Our tool uses a high-precision
requestAnimationFrame loop to measure the actual rate your browser is rendering. For most accurate results, keep this tab in focus and ensure no heavy background processes are running. What does pixel ratio (DPR) mean for me?
DPR (Device Pixel Ratio) describes the density of your display. A DPR of 2.0+ (Retina/HiDPI) means your screen is using multiple physical pixels to render a single logical pixel, resulting in much smoother text and sharper images compared to standard 1.0 DPR displays.