How to find out the monitor diagonal

The purpose of this article is to help determine the monitor diagonal. There are several ways to measure or calculate the exact size of a computer or smartphone screen.

How to find out the monitor diagonal

When buying a TV, laptop or mobile phone, the main characteristic for the buyer is the image resolution, that is, the screen diagonal. Why is this parameter important? When purchasing a laptop, we plan not only to work on it, but also to watch movies or play. For comfortable use and better image quality, the diagonal is of great importance.

This value represents the distance between two opposite corners of the screen, and is measured in inches. The quality of the image depends on the value of this value.

The most well-known parameters are the following:

• 17”, 19”, 21”, 23” for computer screens;
• 32”, 43”, 49”, 50”, 55”, 65” for TVs.
• 4”, 4.5”, 5”, 5.5” for smartphones and mobile phones.
• 13.3”, 15.6”, 17”, 19” for laptops.

How to determine how many inches a monitor is

There are several options for determining the display diagonal. The first two of them are very simple, and for those who are not looking for easy ways, you can remember the school geometry course and figure it out a little.

Manual measurement method

This method of determining the monitor diagonal is very simple. To do this, you need to prepare a ruler or a measuring tape, apply it carefully to the TV or laptop screen diagonally and take measurements. The resulting value in centimeters should be divided by the value of 2.54 - this will be the size in inches.

View documentation

When purchasing any equipment, a package of documents is included with it, which contains all the necessary information. In order to find out how many inches the display of your computer or TV has, you should look at the information in the accompanying documents.

If for some reason you do not have this package of documents, then you can find out what length the monitor is by looking at the label with the model name and other information on the laptop case or on the outside of the TV. Basically, screen resolution is indicated by two numbers in the letter designation or in the first line of the characteristics. For example, the specified laptop model is L1702, respectively, the diagonal is 17”.

REFERENCE! To determine the display diagonal of your computer, laptop or TV, you can use the Internet. To do this, you just need to enter the model and brand of your device in the search engine.

Using specialized programs

You can also determine the display size using specialized programs such as AIDA64, SiSoft Sandra, etc. Having entered the program menu, you should select the “Display” item, then opposite the “Monitor” item the desired parameter will be shown.

These programs produce values ​​that are stored in their database, so if the characteristics are displayed incorrectly or are completely absent, it is recommended to install a new version.

Other ways to determine monitor diagonal

A non-standard option for determining the size of the diagonal is its mathematical calculation using the Pythagorean Theorem “On the Sum of Squares of the Legs”. To solve this problem, it is necessary to measure the length and height of the monitor, square each of the values ​​and add their values. Take the square root of the result in centimeters and divide it by the value 2.54. So the calculated length in inches is ready.

You can also measure this monitor value using a laser device for measuring distance, a curvimeter - a device for determining the length of winding lines, consisting of a toothed roller and a counter.