Your Monitor Information
The box above shows the current width and height of your display in pixels. Combined with your device pixel ratio, this tells you whether you are using a Full HD, QHD, 4K or Retina display.
Unfortunately, web browsers do not expose the physical monitor size in inches — a security and privacy limitation. That is why no website can truly answer "how big is my monitor" without your help. Use one of the methods below.
How to Check Your Monitor Size
- Measure it — hold a tape measure from the top-left to the bottom-right corner of the visible screen (not the bezel). Round to the nearest inch.
- Check the model number — the model on the back of your monitor (e.g.
Dell U2720Q) usually contains the size: 27 inches here. - Look in the box or manual — the "27\"" spec is printed on the box and spec sheet.
- System settings — some operating systems list the display model, which you can then look up online.
Monitor Size vs Resolution
A 24-inch and a 32-inch monitor can have the same resolution (e.g. 1920 × 1080) but different sizes. The difference is pixel density — the 24" monitor packs the same pixels into a smaller area, so text looks sharper.
| Monitor Size | Typical Resolution | Good For |
|---|---|---|
| 21–24" | 1920 × 1080 | Office work, casual use |
| 27" | 2560 × 1440 | Design, productivity, gaming |
| 27–32" | 3840 × 2160 (4K) | Photo/video editing, multitasking |
| 34–49" | 3440 × 1440 or wider | Ultrawide, immersive gaming |
Frequently Asked Questions
How do I know my monitor size without measuring?
Find the model number on the back of the monitor and search for it online — the "27\"" (or similar) number is the screen size in inches.
Is my monitor 24 or 27 inches?
Measure the visible screen diagonally in inches, or check the model number. If you have no access to the monitor, your resolution alone cannot tell you the size — a 1920×1080 display could be 24" or 32".
Why can't this website tell me my monitor size in inches?
Web browsers deliberately do not expose the physical dimensions of your screen to JavaScript for privacy reasons. That is why size-in-inches always requires a manual step.