Free & Easy Screen Size Checker

Wondering how big your monitor really is? You’re in the right place!

Our free, instant tool shows your monitor size right now—no rulers or math needed. Just visit this page, and your screen size will appear instantly, so you know exactly what you’re working with.

Why Know Your Monitor Size?

Knowing your monitor size helps you:

Pick the perfect new screen without guesswork
Set up your desk for maximum comfort
Avoid eye strain and neck pain
Check if your display matches your needs for work, gaming, or streaming

If you want to learn why monitor size matters and how to measure it, be sure to check our detailed blog post: What Is My Monitor Size?. If you want to learn why monitor size matters and how to measure it, be sure to check our detailed blog post: What Is My Monitor Size?.

How Our Tool Works

Our tool uses your device’s display settings to give you your monitor’s diagonal size in inches. No measuring tape needed! Just open the page, and you’ll see your monitor size, width, and height right away.

Want to double-check? Use a tape measure and follow the steps in our blog post for a manual measurement.

What Does “Monitor Size” Even Mean?

Monitor size refers to the diagonal length of your screen—not including the frame or bezel around it. This is how screen makers describe their products: a 24-inch monitor means the visible screen measures 24 inches corner-to-corner.

Need a Refresher?

Diagonal size is the number you care about.
Aspect ratio (like 16:9) tells you the shape of your screen—wider or taller.
Size and resolution aren’t the same: size is physical, resolution is pixels.