The quickest way to check your screen size

Your laptop's screen size is the diagonal measurement in inches from one corner of the display to the opposite corner. The easiest way to find it is to check your original paperwork — the box, receipt, or spec sheet that came with the laptop. If you no longer have those, you can measure the screen yourself with a ruler or measuring tape, or look up the model number in your laptop's settings.

Most people find the answer fastest by opening their laptop's system information. On Windows, you can search for "Display settings" and scroll down to see the screen resolution, though this won't always show the physical size. On Mac, go to the Apple menu, select "About This Mac," and click "System Report" — the screen size may be listed under Graphics. If neither method shows the size directly, measuring the screen takes about two minutes and is completely accurate.

Key Takeaways

  • Screen size is measured diagonally in inches from corner to corner, and most laptops range from 11 inches to 17 inches.
  • Your original box, receipt, or product documentation will list the screen size if you still have access to them.
  • You can measure your screen yourself using a ruler or measuring tape, starting from the bottom-left corner and measuring to the top-right corner.
  • Your laptop's model number can be looked up online to find the exact screen size, and this information is usually on a sticker on the bottom of the device.

Measuring your screen yourself

If you want a definitive answer without searching through old paperwork, you can measure the screen in under five minutes. You will need a ruler, measuring tape, or even a piece of string that you can measure afterward. Close your laptop to a comfortable viewing angle, then place your measuring tool at the bottom-left corner of the screen — where the frame meets the glass — and measure diagonally to the top-right corner.

Measure only the glass or display area, not the plastic bezel around it. Write down the measurement in inches. If you get 13.3 inches, your laptop has a 13-inch screen. If you get 15.6 inches, it is a 15-inch screen. Manufacturers round to the nearest whole number, so measurements between 13 and 14 inches will be called a 13-inch display, and measurements between 14 and 15 inches will be called a 14-inch display.

Finding the model number and looking it up online

Every laptop has a model number printed on a sticker, usually on the bottom of the device or inside the battery compartment. On Windows laptops, you might see something like "HP Pavilion 15-eh1023dx" or "Dell Inspiron 5520." On Mac, look for "MacBook Pro 16-inch M2" or similar. Once you have the full model number, search for it on Google along with the word "specs" — for example, "HP Pavilion 15-eh1023dx specs."

The manufacturer's official product page will appear in the search results and will list the screen size in the specifications section. This is the most reliable method if you want to avoid measuring, because you are getting the information directly from the company that made your laptop. Bookmark or save the page if you think you will need this information again.

Checking Windows system information

On a Windows laptop, you can open Settings and navigate to Display to see some screen information, though it may not show the physical size. Right-click on your desktop and select "Display settings," or search for "Display settings" in the Windows search box. Scroll down to the "Display" section and look for "Resolution" — this tells you the pixel count (like 1920 x 1080), not the physical size in inches.

To find the actual screen size on Windows, you will usually need to use one of the other methods in this guide. However, if your laptop is relatively new, you can try searching for your model number in Settings. Press the Windows key and type "System information," then open it. Look for "System Model" or "Product Name" — this is your model number. Copy it and search online for the full specifications.

Checking Mac system information

On a Mac, open the Apple menu in the top-left corner and select "About This Mac." A window will open showing your Mac model and some basic information. Click the "System Report" button to open a more detailed view. In the System Report window, look for the "Graphics" or "Displays" section — some Mac models list the screen size here, though not all do.

If the screen size is not listed in System Report, you can find your Mac's model name at the top of the "About This Mac" window (for example, "MacBook Pro 16-inch"). Search for this exact model name online along with "specs," and Apple's official product page will show you the screen size. You can also check the original box or receipt if you still have it, as the screen size is always printed on the packaging.

Common laptop screen sizes

Most laptops fall into a few standard screen sizes. Ultraportable laptops typically have 11-inch or 13-inch screens and are designed for travel. Standard laptops usually have 14-inch or 15-inch screens and are the most common size you will find. Larger laptops often have 16-inch or 17-inch screens and are better for desktop replacement or creative work like video editing or graphic design.

Knowing your screen size matters if you are shopping for a laptop bag, external monitor, or replacement screen. It also helps when you are comparing laptops to understand how much desk space you will need. If you are unsure whether your current laptop is 13 inches or 15 inches, measuring takes only a few minutes and removes all doubt.

What to do if you cannot find the information

If measuring, checking your paperwork, and looking up your model number do not work, you can contact the laptop manufacturer directly. Find the support phone number or chat on the manufacturer's website — for example, HP.com, Dell.com, or Apple.com — and provide them with your model number. They can confirm the screen size in seconds.

You can also visit a local computer repair shop or electronics store and ask them to look it up for you. Many will do this for free, especially if you purchased the laptop there. If all else fails, measuring the screen yourself remains the most reliable method and requires no special tools or knowledge.

Frequently Asked Questions

Does screen size affect how fast my laptop runs?

No. Screen size is purely about the physical dimensions of the display and does not change how fast your processor works or how much memory you have. A 13-inch and 15-inch laptop with the same processor will run at the same speed.

Is the screen size the same as the resolution?

No. Screen size is the physical diagonal measurement in inches. Resolution is the number of pixels displayed, like 1920 x 1080. Two laptops can have the same 15-inch screen but different resolutions.

Can I change my laptop's screen size?

No. The screen size is fixed and determined by the physical display panel inside your laptop. You cannot make a 13-inch screen larger without replacing the entire display panel, which is usually not practical or cost-effective.

Why do manufacturers round screen sizes?

Manufacturers round to the nearest whole number for simplicity and marketing. A screen that measures 13.3 inches is called a 13-inch display, and a 15.6-inch screen is called 15-inch. This makes it easier for customers to compare and remember laptop sizes.

What if my laptop screen is cracked — does the size change?

No. A cracked or damaged screen is still the same physical size. The damage does not change the diagonal measurement, only the condition of the display.