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How to Find the External Measurement of a Device's Display Screen

"15, 17, 19, 21, 23, etc. inch?" may be a question most people ask when trying to determine their monitor size when they need to replace it. But measuring a device's screen is actually much easier than it sounds and requires very few tools to measure. This article explains how you can grab this measurement, so you don't have to spend extraneous time and money having someone else do it.

Method 1
Method 1 of 4:

Physical Measurements

  1. How.com.vn English: Step 1 Realize that a...
    Realize that a display screen is at its widest point when it's measured on one of the lengths of it's diagonals.
  2. How.com.vn English: Step 2 Take out a measuring tool and position it at one of the corners of the screen.
    Although it really doesn't matter in what orientation your monitor is or whether or not the screen is touchscreen or not, you can get good precise measurements with this method which most computer nerds and electricians seem to know.
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  3. How.com.vn English: Step 3 Locate the opposite corner of the screen that you'd like to measure the device to.
    If you started at the top left corner, measure it to the bottom right corner of the device. If you started from the top right corner, measure to the bottom left corner.
  4. How.com.vn English: Step 4 Use your measuring tool to measure this distance between these two points.
    Do not let any extra minute snip of a measurement get added to the reading, by allowing it to drag at the edge of the screen and measured from the border of the screen on top of the display screen itself.
    • Don't ever allow your measuring device to cross over and measure into the screen's border area around the screen itself. Come as close to the edge of the screen panel as possible.
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Method 2
Method 2 of 4:

Contacting the Company with Model Number

  1. How.com.vn English: Step 1 Locate the product's model number.
    The model number in most cases, should be either on the back of the device or in the owners manual that came with the screen/device.
  2. How.com.vn English: Step 2 Contact the company for which the model is being sold.
    Make sure to let the company know which product you are inquiring about by referring to it's model number you collected.
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Method 3
Method 3 of 4:

From Owners Manual

  1. How.com.vn English: Step 1 Obtain your owners manual to your device.
  2. How.com.vn English: Step 2 Flip through the first few pages of the book.
  3. How.com.vn English: Step 3 Look under the pages that contain the specifications to the monitor.
    They'll alert you to the size of the screen in the section labeled "Technical Specifications" or "Technical Specs".
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Method 4
Method 4 of 4:

Internet Research

  1. How.com.vn English: Step 1 Locate the product's model number, along with the website page of the company who the model is for.
    Visit the exact brand's website the device is for.
  2. How.com.vn English: Step 2 Search in any search engine for the exact model of the device, using the model number you obtained previously.
  3. How.com.vn English: Step 3 Look for a technical specification area for the model.
    Most companies will tell you upfront, the size of the particular model you had in mind.
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      Tips

      • Although not too many companies do this, HP has thought up an innovative idea. Use part of the name of the model number of the product as the screen size of the product. A vs15 is a 15 inch (38.1 cm) version of the same series of monitor as the in the vs17 and vs19 editions (designating a 17 and 19 inch monitor) of the same product respectively.
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      How.com.vn is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. To create this article, volunteer authors worked to edit and improve it over time. This article has been viewed 4,436 times.
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      Co-authors: 5
      Updated: August 10, 2021
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