How To Determine Laptop Size


Size does matter. At least when it comes to laptops. If your laptop is too small or too big for the task, you may feel frustrated and uncomfortable working on it. But what’s the best way to measure a laptop? 

Quick Answer

You just need a good ol’ tape measure. You only have to measure from one corner of the screen to the opposite corner (diagonally). Depending on the screen size, you’ll know if it’s a 13″ laptop, a 15″ laptop, and so on.

Laptops are mostly classified by their screen size. For example, a 13″ laptop has a 13″ screen, whereas a 15″ laptop has a 15″ screen. But if you’re getting a bag or sleeve for your laptop, you’ll also want to measure its height, width, and depth to ensure it’ll fit.

Read on in this article to learn how to measure the size of a laptop so that you can see if it’s going to be a good fit for you.

How To Measure Your Laptop’s Size

When it comes to laptops, size does matter. The wrong-size laptop can be uncomfortable and makes it difficult to get work done.

Not only do you want a machine that’s easy to tote around, but you also need one that will fit comfortably on your lap or at your desk.

To help you make an informed decision when shopping for your next computer, here’s a quick step-by-step guide to measuring the size of a laptop.

Step #1: Grab a Measuring Tool

You’ll need a measuring tool to get the dimensions of your laptop. There are a few different measuring tools that you can use.

A ruler or a tape measure will work just fine. Whatever you have on hand can be used. When using a ruler, ensure it’s long enough to measure the laptop.

Alternatively, you can also use the Measure app on your iPhone to get fairly decent measurements. Apps similar to these are also available on Google Play for Android.

Step #2: Start Taking Measurements

Once you’ve picked your measuring tool, it’s time to start taking measurements. We’ll need to take a few measurements, such as the laptop’s screen size, height, width, etc.

Also, place your laptop on a flat surface like a table or desk to get accurate measurements.

Before you start, it’s important to note that laptop sizes are typically measured in inches. So be sure to use a measuring tape or ruler with inch markings on it.

Step #3: Measure the Screen Size

There are a few different ways to measure laptops. The most common way is by measuring the screen size. This is usually the most important factor when deciding on a laptop size.

Screen size is measured diagonally, so you’ll want to find the corner of the screen and measure from one corner to the opposite.

Don’t measure from the bezels (black part), but rather from the area of the display that lights up. Most laptop screens are between 12 and 17 inches.

But you’ll also need to measure your laptop’s overall height and width to buy a laptop bag or sleeve.

Step #4: Take a Look at the Overall Dimensions

The next step will be to consider the laptop’s overall dimensions. This includes the width, depth, and height of the laptop.

When taking these measurements, place your laptop on a solid flat surface with its lid closed.

Measure from the bottom of the lid to the top of the laptop to determine the laptop’s height. Similarly, you can measure the laptop’s width from left to right with the lid closed.

And finally, measure the laptop’s thickness or depth from the base to the top with a tape measure or ruler.

Once you have all three measurements (height, width, and depth), you’ll know what size your laptop is. 

How To Determine Laptop Size Without Measuring

If you don’t have the tools or don’t feel like doing all that work, you may wonder if there’s another way to determine laptop size without measuring it manually. Luckily, there is a method for all the couch potatoes out there. 

Simply search for your laptop’s model on Google or any other search engine. From there, several websites should pop up with the dimensions of your desired laptop. 

Of course, remember that not all laptops are created equal in size; there can be variances even within the same model and make.

So, if you’re looking for more precise measurements, it’s best to consult the manufacturer’s website or measure it yourself.

But a quick Google search should do the trick if you’re just looking for a general idea of size. 


Now that you know how to measure laptop size, you can be sure to get the perfect one for your needs. 

Frequently Asked Questions

How do I find out the size of my laptop without measuring it?

Check the underside of your laptop for a sticker with the dimensions, or refer to your laptop’s manual for the information. You can also look for the laptop’s specifications online.

Can a 15.6″ laptop fit a 15″ case?

A 15″ case won’t fit a 15.6″ laptop. The rule of thumb is to get a laptop bag or sleeve that is at least an inch, or even two in some cases, larger than your laptop.

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