How to Check Your Screen Resolution, Refresh Rate, and Monitor Specs
Knowing your screen resolution, refresh rate, and other display specs is surprisingly useful — whether you are debugging a responsive layout, choosing a new monitor, or trying to understand why your website looks different on another device. This guide explains display specs and shows you how to check them instantly.
What Is Screen Resolution?
Screen resolution is the number of pixels a display can show, measured as width × height. Common resolutions include 1920×1080 (Full HD), 2560×1440 (QHD), and 3840×2160 (4K). Higher resolutions mean more detail but also require more processing power and battery on mobile devices.
Resolution alone does not tell the whole story. Two monitors with the same resolution can look very different if they have different physical sizes — a 24-inch 1080p monitor will look less sharp than a 15-inch laptop with the same resolution because the pixels are packed more tightly on a smaller screen. This is where pixel density (PPI) matters.
Device Pixel Ratio (DPR)
Device pixel ratio (also called pixel ratio or DPR) is the ratio between physical pixels and logical pixels. A Retina display has a DPR of 2 or 3, meaning each logical pixel is made up of 2×2 or 3×3 physical pixels. This is why text and images look sharper on Retina screens — more physical pixels are used to render the same logical content.
For web developers, DPR matters because a CSS pixel is not the same as a hardware pixel. An element styled at width: 100px will use 200 physical pixels on a 2x Retina display. If you serve a 100px-wide image on a Retina screen, it will appear blurry because the browser has to stretch it across more physical pixels. The solution is to serve images at 2x or 3x the CSS size.
Refresh Rate
Refresh rate is how many times per second your screen redraws the image, measured in hertz (Hz). Standard monitors run at 60 Hz. Gaming and professional monitors commonly run at 120 Hz, 144 Hz, or even 240 Hz. Higher refresh rates make motion appear smoother, which is why they matter for gaming, video editing, and even scrolling through web pages.
You can check your refresh rate using our Screen Size Detector, which reports the exact refresh rate for every connected monitor.
Color Depth
Color depth (measured in bits per pixel) determines how many distinct colors a display can show. Standard monitors have 8-bit panels (16.7 million colors). Higher-end monitors use 10-bit panels (1.07 billion colors) for smoother gradients and more accurate color reproduction, which matters for photo and video editing.
How to Check All Your Monitor Specs
Instead of digging through system settings on each operating system, use our Screen Size Detector. It reads your display configuration directly from your browser and shows:
- Resolution — pixel dimensions of each monitor
- Pixel ratio — whether each display is standard or Retina
- Color depth — bits per pixel
- Refresh rate — hertz for each display
- Orientation — landscape or portrait
- Position — how your monitors are arranged relative to each other
- Visual layout — a diagram of your monitor arrangement
The tool works on Chrome and Edge with full multi-monitor support. Other browsers fall back to basic screen properties. Everything runs locally — no data is sent to any server.
Why This Matters for Web Development
- Responsive design testing — know the exact viewport sizes you are working with
- Media query debugging — verify your
@mediabreakpoints match actual device resolutions - Asset optimization — serve appropriately sized images based on DPR
- Multi-monitor setups — understand how your site looks across different screens
The Screen Size Detector gives you all this information in one click. Try it now to see your complete display configuration.