Monitor size checker
What Is My Monitor Size? Free Screen Size Checker
Discover your monitor's physical dimensions, model information, and key display specs instantly, including diagonal size in inches, resolution, and pixel density.
Free monitor size checker
See your monitor size right now without rulers or manual math. Open this page and get diagonal size, width, and height in seconds.
Why monitor size matters
Asus ROG Swift OLED
Knowing your monitor size helps you:
- Pick the right screen without guesswork
- Set up your desk for comfort and posture
- Reduce eye and neck strain
- Verify if your display matches work, gaming, or streaming needs
How our tool works
We use your device display settings to estimate monitor diagonal size in inches. Open the page and view size, width, and height instantly. For a manual double-check, use a tape measure and follow the steps in our blog post.
What does monitor size mean?
Monitor size is the visible screen's diagonal measurement, not the bezel. For example, a 24-inch monitor means 24 inches corner-to-corner across the viewable panel.
Need a refresher?
Diagonal size
Measured corner to corner across the visible screen.
Describes screen shape, such as 16:9 or ultrawide ratios.
Size vs resolution
Size is physical dimensions; resolution is pixel count.