Instantly detect your screen resolution, viewport size, PPI, aspect ratio, and device type.
Screen resolution refers to the number of individual pixels (tiny dots) that make up your display. A resolution of 1920x1080 means there are 1,920 pixels horizontally and 1,080 pixels vertically — over 2 million pixels total. Higher resolutions like 4K (3840x2160) pack in over 8 million pixels, creating sharper images and more screen real estate.
Common resolutions include HD (1366x768) for budget laptops, Full HD (1920x1080) for most monitors, QHD (2560x1440) for gaming, and 4K (3840x2160) for professional work. The resolution you choose depends on your screen size, GPU capability, and what you use your computer for.
| Resolution | Name | Total Pixels | Common Use |
|---|---|---|---|
| 1366 x 768 | HD | 1.05M | Budget laptops |
| 1920 x 1080 | Full HD | 2.07M | Most monitors & laptops |
| 2560 x 1440 | QHD / 2K | 3.69M | Gaming & productivity |
| 3840 x 2160 | 4K / UHD | 8.29M | Professional & media |
| 3440 x 1440 | Ultrawide QHD | 4.95M | Immersive gaming |
| Ratio | Common Devices | Best For |
|---|---|---|
| 16:9 | Most monitors, TVs, laptops | General use, video, gaming |
| 16:10 | MacBook Air, productivity laptops | Coding, documents, web browsing |
| 21:9 | Ultrawide monitors | Multitasking, immersive gaming |
| 19.5:9 | Modern smartphones | Mobile content, social media |
| 4:3 | iPads, older monitors | Reading, drawing, presentations |
Screen resolution is the number of pixels displayed on your screen, expressed as width x height. For example, 1920x1080 (Full HD) means the screen has 1,920 pixels across and 1,080 pixels vertically. Higher resolution means more detail and sharper images.
PPI (Pixels Per Inch) measures pixel density. A higher PPI means sharper text and images. Standard desktop monitors are about 96 PPI, laptops range from 110-150 PPI, Retina displays are 220+ PPI, and smartphones are 300-500 PPI.
Screen resolution is your monitor's total pixel count (e.g., 1920x1080). Viewport size is the visible area of your browser window, which may be smaller if the browser isn't maximized or if toolbars/bookmarks bar take up space.
Aspect ratio is the proportional relationship between screen width and height. Common ratios include 16:9 (widescreen, most monitors), 16:10 (productivity laptops), 4:3 (older monitors), and 21:9 (ultrawide).
Web developers use screen size info to create responsive designs that look good on all devices. Knowing common resolutions helps test layouts. The viewport size is especially important since it determines how much content users see without scrolling.
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