How to Check the Screen Size of Laptop: The Ultimate Guide

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Knowing the size of your laptop screen is important for various reasons, ranging from fitting it with the right accessories to optimizing your display settings for better productivity or an improved gaming experience. This article provides a step-by-step guide on how to check the screen size of a laptop, beginning with checking the documentation that comes with the laptop, to doing physical measurements and even consulting the manufacturer’s website for official specifications.

Check the Laptop Documentation

Find the Documentation

Every laptop comes with a pack of documents usually containing the user manual and a warranty card. These documents have all the technical specifics about your laptop.

Look for Screen Size Information

Flip through the user manual or any document that contains the laptop’s specifications. This information is often found in a section titled specifications or mentioned in the laptop’s description.

Determine the Actual Size

Once located, check for the screen size information. Laptop screen sizes are typically named diagonally in inches. For example, if it’s noted as 15.6 inches, that’s the screen size of your laptop.

Physically Measure the Screen Size

Get a Measuring Tape or Ruler

If you cannot locate the documentation, another way to check the laptop screen size is by physically measuring it.

Measure the Diagonal Distance

Take a ruler or a measuring tape and measure the screen diagonally from one corner to the opposite corner.

Convert the Measurement

Ensure you measured in inches as laptop screens are typically measured in this unit. This measurement gives you the actual size of your laptop screen.

Check the Laptop’s Display Settings

Open the Display Settings

An alternate way to determine your laptop screen size is by checking your screen resolution via the display settings on your laptop.

Find Screen Resolution Information

Locate the screen resolution stats. This may not give you the direct screen measurement in inches but it can be converted using a screen size calculator or formula.

Use a Screen Size Calculator/Formula

Input the screen resolution to a screen size calculator online and it’ll return the estimated screen size or use the formula Width^2 + Height^2 = Diagonal^2 for manual calculation.

Consult the Manufacturer’s Website

Find the Laptop Model

Each laptop model has unique specifications including screen size. If all else fails, enter your laptop model into the search bar on the manufacturer’s website.

Find the Specifications Section

Here you’ll find the full details of your laptop model including the screen size, resolution, and other display features.

Check Screen Size Information

The screen size should be found under the ‘Display’ or ‘Screen’ section of the product specifications.


Knowing how to check the screen size of your laptop is essential whether it’s for enhancing your user experience or even accessorizing your device. Be it through documentation, direct measurements, display settings, or consulting the manufacturer’s website, you can confidently recognize your laptop’s screen size.

Frequently Asked Questions

Q: What is the average laptop screen size?

A: The average laptop screen sizes range between 13 to 15 inches diagonally.

Q: How do I convert screen resolution to screen size?

A: You can convert screen resolution to screen size using a screen size calculator online or manually with the Pythagorean theorem.

Q: Are laptop screen sizes measured in inches?

A: Yes, laptop screens are typically measured in inches, diagonally from corner to corner.

Q: Does a bigger screen size use more battery?

A: Generally yes, larger screens and higher resolutions do consume more power, which may affect battery life.

Q: Does screen size affect performance?

A: Screen size doesn’t directly affect performance, but higher resolutions may affect graphic performance if you’re gaming or video editing.