Screen Resolution Test — What Is My Screen Resolution?
This tool detects your current screen resolution and display properties using your browser. All detection happens client-side — no data is sent to any server.
Logical Resolution
Detecting...
CSS pixels reported by your browser
Physical Resolution
Detecting...
Actual hardware pixels on your screen
Device Pixel Ratio
Detecting...
How many physical pixels per CSS pixel
Color Depth
Detecting...
Bits per pixel for color rendering
Aspect Ratio
Detecting...
Width-to-height ratio of your screen
Viewport Size
Detecting...
Visible area of your browser window
What Do These Values Mean?
- Logical Resolution
- The resolution your operating system reports to web browsers, measured in CSS pixels. On high-DPI (Retina) displays, this is lower than your physical resolution because your OS scales the UI.
- Physical Resolution
- The actual number of hardware pixels on your screen. Calculated by multiplying your logical resolution by the device pixel ratio. This is the resolution listed in your device's specifications.
- Device Pixel Ratio (DPR)
- The ratio between physical pixels and CSS pixels. A DPR of 2 means each CSS pixel is rendered using a 2x2 grid of physical pixels, resulting in sharper text and images. Most Retina/HiDPI displays have a DPR of 2 or 3.
- Color Depth
- The number of bits used to represent the color of each pixel. 24-bit means 8 bits per channel (red, green, blue), supporting 16.7 million colors. 30-bit adds 10 bits per channel for over 1 billion colors.
- Aspect Ratio
- The proportional relationship between your screen's width and height. Common ratios include 16:9 (widescreen), 16:10 (many laptops), and 21:9 (ultrawide monitors).