With these inches, nothing is clear. It would be much easier if manufacturers indicated the diagonals of their devices in centimeters. So we could determine the screen diagonal by eye and decide for ourselves whether it is a lot or a little. But usually phones, tablets are indicated in inches. Therefore, one often hears from buyers: "7-inch diagonal - how much is it?" Let's understand these units of measurement once and for all.

Diagonal 7 inches - how much is it in centimeters?

The easiest way to figure it out is to convert inches to centimeters. Connoisseurs know that one inch equals 2.54 centimeters. Based on this, it is easy to calculate how much is a 7-inch diagonal. It will be equal to 17.78 centimeters. Take a regular ruler and see what the segment will be. In the future, if you don't understand the diagonal, you can translate inches to centimeters yourself: just multiply the value by 2.5. It can be done even in the mind. If you have a calculator, then multiply by 2.54. This will be more accurate.

TV diagonal

If you are trying to pick up a TV, then one of the important parameters is its length between two opposite edges - bottom and top. This is the diagonal of the TV. Modern models are available in different diagonal sizes. There are very large TVs with a diagonal of 50 inches or more. But the models that are now the most popular and widespread have a diagonal of 32 inches. This is the "golden mean" between a huge cinema and a small model in the kitchen.

But as for seven inches, this is extremely small for a TV. Perhaps, there are no such models with such a miniature diagonal. However, there are special or travel devices on the market, but such devices have been popular for a long time. Now they are superseded by tablets.

Tablet screen size

It is worth noting that most tablets are exactly 7 inches. This category usually includes inexpensive budget models that are in the greatest demand. They fit perfectly in the hand, which makes them easy to operate. In such a diagonal it is not necessary to install a matrix with high resolution, which reduces the cost of the tablet itself.

The most popular 7-inch models are:

1. Huawei MediaPad.
2. PocketBook Surfpad U7.
3. 4Good T700i.

There are also models from the popular Korean manufacturer Samsung. You can list them for a long time, but the fact is that the 7-inch diagonal is ideal for an inexpensive budget tablet.

There is another category - gadgets with a diagonal of 9-10 inches. This "fashion" was set by the manufacturer Apple, which in 2010 introduced a tablet with a 10 ″ diagonal on the market. And although in fact there is only 9.7 ″, nobody cares anymore. Many modern gadgets with such a diagonal are positioned exactly as 10-inch tablets.

There are other models with 12-inch screens, but this is already a rarity.

Mobile phones

If you still can't imagine how much a 7-inch diagonal is, then visualize a smartphone that barely fits in one hand. Such a phone has approximately the same diagonal. But this is also rare, as most mobile phones are equipped with 5-inch screens. There are also versions with 5.5-inch screens. Rarely are 6-inch smartphones, and there are only a few models with 7-inch matrices.

Popular iPhone smartphone 7 received a diagonal of 4.7 inches (almost 5), and the new Korean Samsung flagship The S8 has a 5.8-inch screen. But we must admit that the matrix of this smartphone is not classic. I even had to introduce a new term Infinity Display to explain the large diagonal.

Conclusion

Remember the number "2.54". To understand how much a 7-inch diagonal is, you just need to multiply the value by 2.54 or at least 2.5 for higher accuracy.

Every person in life has a large number of various screens. Mobile phones, tablets, TVs, monitors, laptops - there are screens everywhere, which, at the same time, are measured in inches.

However, for many people this measurement is problematic, because everyone is used to counting distances in centimeters. What is 1 inch equal to? How to understand what the diagonal of a 44-inch TV will be? These questions torment many, so it's time to find answers to them. After reading this article, you will no longer think looking at the 7-inch diagonal: "How many centimeters?" - you can calculate everything yourself.

What is an inch?

So, before you, for example, a 7-inch diagonal. How many centimeters? The answer to this question is very easy if you know what an inch is. A little later, you will learn much more information about why this measure of length originated. Now it is more important to simply answer the basic question.

If you need to convert a distance or length from inches to more familiar centimeters, then you should remember that one inch equals 2.54 centimeters. So, for example, you want to buy a tablet with a diagonal of 7 inches. How many centimeters will the diagonal be? By performing a simple mathematical operation, you can easily find out that this is 17.78 centimeters.

Origin of the term

Naturally, now everyone wants to know where this measure of length came from. There are a large number of different versions, but the most basic and plausible is the one according to which the width of an adult man's thumb was considered to be an inch. This theory is confirmed at least by the fact that from the Dutch language duim is translated as "thumb".

However, there are different stories about how this measure of length came to be used in different countries. An inch represents 1 / 36th of a yard, which in turn has been recognized as the official measure of length from the tip of the nose to the outstretched thumb of King Henry the First. There was also a legal inch, the length of which was equal to the length of three grains of barley. In general, there are many options, but most of them in one way or another are associated with the thumb.

What is measured in inches

Accordingly, inches were slightly different in each country, with some having several national variations of the inch. Today, the English inch used in the United States has been adopted as the standard. So now, seeing that the screen has a diagonal of 7 inches, "How many centimeters?" - this is not the question that you will ask, since you already know the answer.

All equipment is measured in such inches - in most cases these are screens, but there can also be, for example, floppy disks. But in other areas, inches are also sometimes used all over the world - for example, when measuring the diagonal of car rims.

Sooner or later, you come across the fact that some values ​​are indicated in inches. And to find out how much it is in centimeters, you need to convert inches to centimeters. You can count, find in a spreadsheet, or use a converter app.

Inches, designation

Part of the world measures dimensions in inches and feet. Actually, usually meters, centimeters, millimeters are also used, but inches are more common. These are the units of measurement in the USA, Canada, Great Britain. And the rest follow them. It so happened, for example, that the diagonals of TVs, screen sizes in smartphones, shoe sizes (and much more) are indicated in inches. So you have to think about how to convert inches to centimeters, meters or millimeters.

Converting inches to centimeters (cm) is a trivial task. You just need to remember that 1 inch is 2.54 cm

First, let's talk about how these inches are designated. In English, this is inch. If there are many (inches), write inches. In the abbreviated version, use only the first two letters in. This is found in the text. There is also a graphic image - these are two dashes at the top near the number. For example: 3 ″, 5.2 ″. It reads like 3 inches, five and two inches.

Inch in centimeters, millimeters: how much is it?

To convert inches to centimeters, you need to remember that one inch is 2.54 cm or 25.4 mm. The figure is not so big, you can remember it or write it down somewhere.

One inch is 2.54 centimeters

Sometimes numbers don't want to stay in memory. Pictures can help or you can try to imagine something of this size. Probably everyone knows the tale about Thumbelina. So, this fairy-tale character was one inch tall, that is, a little more than two and a half centimeters. Can someone help remember.

How to convert inch to centimeters

• 2 inches is how many centimeters: 2 ″ * 2.54 cm = 5.08 cm.

We act similarly with any other value:

• 7 inches is 7 ″ * 2.54 cm = 17.78 cm;
• three inches = 3 ″ * 2.54 cm = 7.62 cm;
• 50 inches in centimeters is 50 ″ * 2.54 cm = 127 cm or 1 meter and 27 cm.

Converting inches to centimeters and millimeters (cm and mm)

Fractional inches conversion and table

But size is not always an integer. There are often tenths of the same inch. Not to say that this greatly complicates the task of converting to centimeters. You just won't find tables with such values ​​- they are too big. So, unambiguously, you will have to count yourself. And you need to act in the same way: multiply the size in inches by 2.54 cm.

• We convert 1.2 ″ into centimeters - 1.2 ″ * 2.54 cm = 3.048 cm or almost 3.05 cm (this is after rounding);
• 5.7 ″ - 5.7 ″ * 2.54 cm = 14.478 cm. After rounding, we get 14.5 cm.

If the size is specified in regular fractions, the translation is a little more complicated. You need to divide 2.54 cm by the denominator (this is the figure below) and multiply by the numerator (the figure at the top of the fraction). Let's look at some examples. This will make it clearer.

• We translate 3/5 ″ into centimeters like this: 2.54 cm / 5 * 3 = 1.524 cm. That is, 3/5 inch is 1.52 cm.
• 1/4 ″ in centimeters is 2.54 / 4 * 1 = 0.635 cm, that is, it is 6.4 mm.

If the size is indicated in the form of a correct fraction, that is, there is an integer and a fractional part - 2 1/3 ″ or 5 3/8 ″, to say how many it is in centimeters, we multiply the whole part by 2.54, and with the fractional part we proceed as described above. Let's look at some examples:

• 3 4/7 ″ must be converted to centimeters. First, we translate the whole part. It's 3 ″. We multiply this figure by 2.54 cm. 3 ″ * 2.54 cm = 7.62 cm. Next we translate fractional part: 4/7 ″ is 2.54 / 7 * 4 = 1.45 cm. And now we add both results: 7.62 cm + 1.45 cm = 9.07 cm. That is, 3 4/7 ″ are equal to 9 , 07 cm.
• Let's translate another 2 2/3 inches. Whole part - 2 ″ * 2.54 cm = 5.08 cm. Fractional 2/3 ″ - 2.54 cm / 3 * 2 = 1.69 cm.Total: 5.08 cm + 1.69 cm = 6 , 77 cm.

All these operations are simple. You will need a calculator, which is available on any phone. If you don't even want to count on a calculator, there are tables in which the most common values ​​are indicated. They can also be saved on the phone or printed out. In general, as you like.

Reverse translation: centimeters to inches

Less often, we need to convert centimeters to inches, but such tasks also occur. There are two ways. First: divide centimeters by 2.54 and get the value in those same inches. Second: you need to remember how many inches are in one centimeter (0.39 ″ in 1 cm) and multiply the centimeters by this number when translating.

Which is the best way? First. There are two reasons. The first is that it is easier to keep one number in mind. Second, this method gives a more accurate result. Simply, when displaying the figure 0.39, the value was rounded, which increases the error. To illustrate, let's do a couple of translations.

Two ways to convert cm to inches

It is necessary to convert 27.6 cm to inches. Let's do it in two ways:

• 27.6 cm / 2.54 cm = 10.86 ″.
• 27.6 cm * 0.39 = 10.76 ″.

As you can see, there is a difference. This is exactly the error that we talked about. If you need a more accurate value, use the first method better. It is more accurate.

Let's see another example. Let's convert 100 cm to inches.

• 100 cm / 2.54 = 39.37 ″;
• 100 cm * 0.39 = 39.0 ″.

As you can see, there is a rather large margin of error. So if precision is important, use the division method.

Apps to convert inches to centimeters and back

Using the calculator on your phone to convert inches to centimeters is the easiest thing. There are many more applications that allow you to do this almost automatically. All you need is to go to Play Store and enter the query in the search bar: conversion of inches to centimeters. About a dozen applications are dropped.

You can put an inch to cm converter on your phone

There are those that convert only inches to centimeters or millimeters, and there are those with the ability to convert different values. All work adequately, you need to choose the one that is more convenient for you. In general, they work according to the same principle. First, choose what you translate into, then drive in the number that you want to translate. The required value is displayed on the screen. The truth is simple.

To make it easier for users to navigate the rest of the diagonal of the screen, we present a table that links the diagonal of the screen with its width and height. In the table, for each value of the diagonal in inches, the value of the same diagonal in centimeters is given, as well as the width and height of the screen in centimeters.

In the calculations, it was assumed that the screen has an aspect ratio of 16: 9, which is the ratio of most TV sets.

TV diagonal in cm and inches, correspondence table:

In the following table, the width and height are given specifically for the screen, and not for the entire TV. To find out the size of the TV, you need to add the dimensions of the frame around the screen. In modern television sets, the bezel is very thin and can range from a few centimeters to a few millimeters.

An inch (from the Dutch. Duim - thumb) is a unit of measure for distance in some European non-metric systems of measures. Today, an inch is most often understood as an English inch equal to 2.54 cm.

The English inch or imperial inch (eng. Inch from lat. Uncia - 1/12 part) since 1958 equals exactly 2.54 cm. An inch is usually denoted by two strokes ", in English-speaking countries there may also be a designation in from the word inch. In Russian there is no letter designation in.

Centimeter (cm, cm;) is a unit of length in various metric systems of measures, equal to 0.01 meters. 1 cm ≈ 0.3937 in.

Buyers make a choice of a specific tablet model based on different characteristics of the device. In addition to operating system, internal memory and others technical characteristics the user often pays attention to the screen size. There are generally accepted standards for the size of monitors, which will be discussed below.

What are the sizes of tablets in inches

There are several options for tablet diagonal sizes in inches. For example, a table is presented where dimensions are presented in inches and centimeters. Basically, of course, it is measured in inches.

7 inches. A small tablet that completely fulfills its mobile functions. Slightly more mobile phone to size. Good for touch screen gaming. You don't have to move your hand, just grab the device from both sides. A good choice for children and those who travel often and prefer to take gadgets with them. As for typing, this will have to be sacrificed, because the keyboard will take up most of the screen, but the buttons will still remain small. There are representatives with an aspect ratio of 3 by 4 and 16 by 10.

8 inches. A slight increase in the previous version. The size resembles a standard book, so reading or writing will be the most convenient on such a device. Mobility remains, but watching movies is not the most best use such a screen. Black stripes are likely to remain on the sides of the image. Like last time, there are two types of resolution with such a diagonal - 3x4 and 16x10.

9 inches. Slightly enlarged previous version, found only with a ratio of lengths to widths of 16 to 10. It is rare, and will not do much of the weather, you need to choose with an eye to other signs.

9.7 inches. This format is considered standard for iPads. The screen is too large for gaming on touch screen, but if you connect a joystick, then the problem will be solved. Watching movies and typing text is now much easier. But do not forget that the elaboration of each pixel takes power. random access memory therefore, the wider and taller the screen, the more power is spent on displaying the image. Some users complain about the heavy weight of the gadget. This choice is great for office work.

10, 1 in. The tablet is heavy for standard manipulations, but great for watching movies - the aspect ratio is ideal for video formats. For all other purposes, it will not be very convenient.

12+ inches. Rare representatives of the family of tablets, the size of monitors which are comparable to the dimensions of a laptop display. This device cannot be called mobile, big sizes pay off by the inconvenience and fragility of the design.

What are the sizes of tablets in centimeters

Designations in centimeters are more understandable and familiar to residents Russian Federation, but there are no fundamental differences between inches:

• 17.8 cm. The smallest tablet view, at 7 inches. Mobile, good for games, fits in your pocket. Length-to-width ratio 151x94 mm.
• 20.3 cm. The size is already bigger, it looks like a book. Fits in a small bag, adapts well to use as a "reader". Length and width, respectively, 163x122 mm.
• 23 cm. Mediocre, "standard" version. If you use the tablet as a guide to the Internet without involving third-party functions, then 9 inches is the most suitable choice.
• 24.6 cm. Such a choice is already considered to be rather oversized, so it is for office work or constant text editing. Aspect ratio: 197x148 mm.
• 25.7 cm. Enlarged "office" screen. Movies on such a "giant" are much more convenient to watch, but the weight can be inconvenient. Screen 217x136 mm.

The largest and smallest tablet

In addition to the generally accepted sizes, there are outstanding representatives of " mobile computers”, Which were created not so much for the sake of functionality, but more for participation in the competition for sizes.

The world's largest tablet - Ardic Technology London Edition. It will no longer be possible to take it with you on the road, put it in a bag, in a briefcase, bring it into the house, lift it. Its diagonal is 383 inches, and working on such a whopper is, to put it mildly, inconvenient. The giant comes with a giant typing keyboard, but it doesn't solve the problem.

The world's smallest working tablet is the LEXAND SB5 HD in-car. The diagonal is 5 inches. It is not so different from ordinary representatives of its kind, but it is not so easy to put the technological filling in a small case. This device looks more like a phone in terms of its dimensions.