Find your screen size in Windows Settings

The fastest way to find your screen size in Windows is through Settings. Open Settings, then go to System and select Display. Look for the section labeled "Scale and layout" — your screen resolution appears there, but that is not the same as physical size. The resolution tells you how many pixels fit on the screen; the physical size is what you need to measure or look up separately.

Windows does not display the diagonal measurement (the standard way screens are sized) anywhere in Settings. You will need to either measure the screen yourself or find the model number and look up the specs online. The model number usually appears on a sticker on the back of the monitor or on the bezel at the bottom.

Key Takeaways

  • Screen size is measured diagonally in inches, but Windows Settings only shows resolution (pixel count), not physical dimensions.
  • The fastest way to find the exact size is to locate your monitor's model number on the back or bottom bezel and search the manufacturer's website.
  • If you cannot find the model number, you can measure the screen diagonally from corner to corner with a tape measure.
  • Laptop screen size is usually printed on the bottom bezel or in the device specifications under System Information.

Measure your screen with a tape measure

If you do not have the model number or cannot find it online, you can measure the screen yourself. Use a tape measure or ruler and measure diagonally from the bottom-left corner of the screen to the top-right corner. Measure only the display area, not the plastic frame around it. Round to the nearest half-inch — most screens are sold in standard sizes like 21.5, 24, 27, 32, or 34 inches.

This method works for both desktop monitors and laptops. For laptops, measure from the bottom-left corner of the display to the top-right corner of the display, not including the keyboard or bezel. The measurement you get is the diagonal screen size.

Find the model number on your monitor

The model number is your fastest route to the exact screen size. On a desktop monitor, look on the back panel or the bottom bezel — you will see a label with the manufacturer name (Dell, LG, ASUS, HP, etc.) and a model number. Write down the full model number, including any letters or dashes.

Once you have the model number, go to the manufacturer's website and search for that model. The product page will list the screen size, resolution, and other specs. If you cannot find the website, search "[manufacturer name] [model number] specs" in a search engine. This gives you the official size rather than a measurement that might be slightly off.

Check screen size on a laptop

Laptop screen sizes are usually printed on the bottom bezel of the screen itself — look for text like "13.3" or "15.6" printed near the hinge or on the frame. If the text has worn off or is not visible, you can find the size in your system information. On Windows, press the Windows key and type "System Information," then open it. Look for "System Model" — search that model number on the manufacturer's website, and the screen size will be listed in the specs.

Another way is to check your original purchase receipt or the box the laptop came in. The screen size is always listed on the box and in the product documentation. If you no longer have those, the manufacturer's support page for your model will have the full specifications.

Understand screen size versus resolution

Screen size and resolution are two different measurements that often confuse people. Size is the diagonal measurement in inches — a 27-inch monitor is 27 inches from corner to corner. Resolution is the number of pixels displayed — a common resolution is 1920 × 1080, which means 1920 pixels wide and 1080 pixels tall.

Two monitors can have the same resolution but different sizes. A 24-inch monitor and a 27-inch monitor can both display 1920 × 1080, but the pixels are larger on the 27-inch screen because they are spread over more space. This is why a 27-inch screen at the same resolution feels less sharp — the pixels are bigger. Windows Settings shows you resolution, not size, so you need another method to find the physical dimensions.

Use the monitor's on-screen menu

Some monitors display their model number and specs in the on-screen menu. Press the Menu button on your monitor (usually on the bottom bezel or the back) and look for an "Information" or "About" option. This menu sometimes shows the model number and screen size, though not all monitors include this feature.

If your monitor has this menu, it is a quick way to confirm the size without searching online. If the menu does not show the information, go back to looking for the model number on the back of the monitor or measuring the screen yourself.

Search for your monitor online if you know the brand

If you know the brand but not the exact model number, you can narrow it down by searching. Go to the manufacturer's website (Dell.com, LG.com, ASUS.com, etc.) and look for a product finder or monitor selector. Many manufacturers let you filter by screen size, so you can see all the models they make in a certain size range and match the design to your monitor.

You can also take a photo of your monitor and do a reverse image search on Google Images. This sometimes returns the product page or retailer listings that show the model number and size. This method is slower than finding the model number directly, but it works when other options are not available.

Frequently Asked Questions

Is screen size the same as resolution?

No. Screen size is the diagonal measurement in inches (like 24 inches). Resolution is the number of pixels (like 1920 × 1080). A monitor can have the same resolution as another but a different physical size. Windows Settings shows resolution, not size.

Where exactly is the model number on a monitor?

The model number is usually on a sticker on the back panel of the monitor, or on the bottom bezel near the power button. It includes the manufacturer name and a code like "U2720Q" or "27UP550." Check both the back and the bottom before assuming it is not there.

Can I measure my screen with my phone instead of a tape measure?

Yes, if your phone has a measurement app. Most newer iPhones and Android phones include a built-in measure app. Open it, point at the screen corner-to-corner, and it will give you the diagonal length. This is less accurate than a tape measure but close enough to identify the standard size.

What if I cannot find the model number anywhere?

Measure the screen diagonally with a tape measure from the bottom-left corner to the top-right corner of the display area only. Round to the nearest half-inch. Most monitors are sold in standard sizes like 21.5, 24, 27, 32, or 34 inches, so your measurement should match one of these.

Does Windows tell you the screen size anywhere?

No. Windows Settings shows resolution and scaling, but not the physical diagonal size. You have to find the model number, measure it yourself, or check the monitor's documentation to learn the actual screen size.