A 40-inch diagonal is how many cm a TV is: width and height in centimeters

In the store you can often hear the question: a 40-inch diagonal is how many cm is a TV, its dimensions in width and height. Unfortunately, the monitor size indicated in inches is of informational value only to a specialist. However, the information does not contain any indication of the width and height of the screen of the TV receiver, nor how many cm are the dimensions of the computer monitor or the length and width (height).

In the shop

Value in centimeters

A diagonal of 40 inches is equal to 101.6 centimeters, and this figure can be obtained with minimal information and simple skills. Websites for uninformed users and portals for potential buyers post conversion tables for converting inches to cm and online calculators. They also indicate what the diagonal is in inches by placing the value in cm in the next column.

Length converter from centimeters to inches and vice versa.

A somewhat outdated unit of measurement in the English system of measures was adopted by manufacturers from different countries for the so-called unification of the information space.

In this regard, some points should be clarified:

1. Products of advanced brands from all over the globe are supplied with diagonal numbers in inches, although potential domestic buyers are more interested in the length and width (height) of the device as a whole, for placement in a designated special niche or in a compartment of a furniture wall.
2. Unification of indicators in a single information space and in electronics supermarkets operating in real conditions or on the Internet is not always convenient. Often, the buyer is forced to ask questions about how many centimeters it is or what the width and height of the entire device are.
3. The product description still displays only a number with a standard quotation mark (in this case, 40 inches on the price tag or 40 inches in the short description).

In stock

An inexperienced buyer is advised to convert inches into cm and is even kindly informed that an English inch is equal to 2.54 cm. You can use the conversion table, which already provides data on how much any diagonal is in centimeters. They also use an online calculator or a function on a mobile phone.

Pipe sizes in inches, converted to millimeters (mm)

your mark

[Ratings: 7 Average: 4.9]

Inches to centimeters Author admin average rating 4.9/5 — 7 user ratings

Inches and cm

Obtaining reliable information about the height and width of the screen of the coveted TV, which has become an item of choice after repeatedly viewing offers from advanced brands, requires certain knowledge.

Sharp image

And the main thing is that not even how many centimeters an inch holds, or how much in the usual metric system, where centimeters and meters are used, the diagonal of a 40-inch TV. This figure can be found out by calculations or by looking at the table of inches and centimeters on the information portal.

The main parameter that determines how tall and long the TV screen will be in inches or cm is the aspect ratio. And this is precisely the fact that enterprising sellers in electronics supermarkets, online stores and markets prefer to keep silent about.

Before the purchase

Previously, a ratio of 4:3 was considered common.

But with the advent of new technologies, the optimal shape of the TV screen became not an almost square, but a rectangular one. In this case, aspect ratios 16:9 and 16:10 have become more popular. These are the most common variations that can be found on the shelves of electronics supermarkets.

TV diagonal

If you are trying to choose 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 with different diagonals. There are very large TVs, the diagonal of which is 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 for 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 TVs on the market for cars or for traveling, but such devices have been popular for a long time. Now they are being replaced by tablets.

Features of choice

Most buyers who are not particularly strapped for money assume that buying a TV for a spacious living space should be based on the size of the screen. The larger it is in all respects, the clearer and more real the resulting image will be.

In the living room

In fact, in order to see better, you can limit yourself to a forty-inch diagonal, but provided that it has the following characteristics:

• high resolution (therefore, for a small room you can purchase excellent models from branded manufacturers, starting from 32 inches, which provide normal visualization);
• a good frequency of picture changes, allowing you to see a smooth flow, and not jerks that are harmful to vision and perception;
• sufficiently distant from the viewer (the largest screen does not provide the desired viewing pleasure if the size of the room does not allow it to be installed at the required distance from the viewer).

Tablet screen size

It is worth noting that most tablets have a screen diagonal of exactly 7 inches. This category usually includes inexpensive budget models that are in greatest demand. They fit perfectly in the hand, making them easy to control. It is not necessary to install a high-resolution matrix in such a diagonal, 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. It would take a long time to list them, but the fact is that a 7-inch diagonal is ideal for an inexpensive budget tablet.

There is another category - gadgets with a diagonal of 9-10 inches. The tone for this “fashion” was set by the manufacturer Apple, which in 2010 introduced a tablet with a 10″ diagonal to the market. And although in fact it’s only 9.7″, no one cares about it anymore. Many modern gadgets with this diagonal are positioned as 10-inch tablets.

There are other models with 12-inch screens, but these are already rare.

Rating of the TOP 18 best 40-inch TVs of 2021

7 inch tablets

Lenovo TAB M7 TB-7305i 16Gb

Lenovo tops the rating of tablets with a 7-inch screen. For review, we took one of the new products from the Chinese manufacturer - TAB M7 in the TB-7305i modification. This device is based on the MediaTek hardware platform, has 16 GB of permanent memory and supports flash cards up to 128 GB. But the RAM in the device is only a gigabyte, which may not be enough for a 2021 tablet in some tasks.

The Lenovo tablet is equipped with a 3500 mAh battery, which is enough for about 10 hours of operation under standard load.

The device is superbly assembled, and users are offered two color options to choose from – silver and black. But the front panel in both cases is dark. On the front there is a good display with a resolution of 1024x600 pixels. Above it is the front camera and earpiece. Yes, the inexpensive Lenovo tablet supports voice calls. True, the only SIM card can only work in 3G networks.

Advantages:

• high-quality assembly;
• good brightness;
• fast operation of the OS;
• autonomous work;
• weight only 237 grams.

Flaws:

• little RAM.

BQ 7040G Charm Plus

The review continues with a tablet computer produced by BQ. This brand is represented only in the budget category, and here it has almost no competitors. With a recommended device price of 5,000 rubles, it offers very good parameters, including 2 GB of RAM, a good IPS screen with a resolution of 1280x800 pixels and two SIM slots.

The BQ tablet boasts a cute design and a choice of silver, gold or black. As for the cameras, it is typical for inexpensive models that they are mediocre - a 0.3 MP front camera and a 2 MP rear module. But if you need to take a photo of a document and have a video call, then they will be enough.

Advantages:

• cool display;
• slots for two SIM cards;
• good selection of colors;
• affordable price.

Flaws:

• not the best autonomy.

Prestigio Grace PMT4327D 3G

The list continues with the inexpensive but good Prestigio tablet.
Russian buyers are well aware of the products of this Belarusian company. For a very affordable price in the Grace PMT4327D model, users will receive a good display with a resolution of 1024×600 pixels and a convenient proprietary shell. The latter is based on the Android 8.1 system. The device has 16 GB of permanent memory, and it can officially be expanded with cards only up to 64 GB. But tablet owners note that it also reads larger flash drives. It also provides the ability to work in cell phone mode on 3G networks. Let's add to this the good battery life provided by the 3000 mAh battery.

Advantages:

• popular brand;
• service support;
• capacious battery;
• thoughtful shell;
• there are voice calls.

Flaws:

• only 1 GB of RAM.

DIGMA Plane 7561N 3G V2

If you need an even cheaper option, then the budget seven-inch tablet model from DIGMA will be a very good choice. If desired, this tablet computer can be purchased for only 3,500 rubles. Yes, for this price you will not get the latest version of the Android 7 system. But it copes better with just 1 GB of RAM than the larger current “green robots”.

As can be judged by customer reviews, the tablet is fast and reliable. The device screen has a good resolution of 1280×800 pixels. But the battery here is not very capacious - only 2500 mAh. True, the system and hardware in the 7561N are not particularly power-hungry, so with a moderate load, a full charge will last for a day of work.

Advantages:

• two slots for SIM cards;
• OS speed;
• main camera flash;
• display resolution;
• attractive design;
• very low cost.

Flaws:

• not the most up-to-date OS.

Lenovo Tab 4 TB-7504X 2Gb 16Gb

The popular Lenovo Tab 4 TB-7504X tablet model may well become an alternative to a regular smartphone. The device is equipped with a screen with a classic 16:9 aspect ratio and HD resolution, supports operation in 4th generation networks and allows you to install two SIM cards at once (or one if a memory card is used).

The tablet's powerful battery (3500 mAh) provides good autonomy. It charges, as in most budget devices, via the Micro-USB port. The device body is made of high-quality matte plastic. It is quite tenacious and durable, so it is not necessary to purchase additional ones for the tablet. But it’s better to get a protective film.

Advantages:

• excellent display;
• reasonable price tag;
• cell mode;
• battery capacity;
• high-quality assembly;
• event indicator;
• slots for two SIM.

Flaws:

• oleophobic coating;
• sometimes freezes.

HUAWEI MediaPad T3 7.0 16Gb 3G

The TOP Chinese tablet from the popular company Huawei continues. Typically, devices from this brand are somewhat more expensive, but if you need a simple solution with the minimum required performance for watching videos, undemanding games, messaging and navigation, then the MediaPad T3 is an excellent option.

The device is not based on the most popular Spreadtrum SC7731C processor, which is why programs cannot always boast of ideal smoothness. But the GPS quality of the Huawei tablet is excellent. The same applies to mobile networks, but only 3G and only for the Internet. Also among the characteristics of this tablet, we highlight a 4100 mAh battery, which is a record figure in our review.

Advantages:

• reasoned cost;
• holds a charge for a long time;
• excellent battery;
• quality of body materials (aluminum);
• bright and sensitive screen;
• stable GPS operation.

Flaws:

• processor used;
• Slow charging.

Lenovo Tab 4 TB-7304F 8Gb

Do you want to buy the ideal 7-inch tablet in combination of price and quality for a student? We recommend taking a closer look at the Lenovo Tab 4 TB-7304F. This model is as simple as possible, so it is suitable exclusively for training. The RAM here is only 1 gigabyte, but this is enough to run the Android 7.0 system, browser and various educational applications.

Please note that this tablet computer does not have a SIM card slot, so you can only access the network via Wi-Fi. On the one hand, this will not distract you in class, but on the other hand, it will not always allow you to quickly find the information you need.

As for the built-in memory, 8 GB may not be enough for everyone. But if necessary, the storage can be expanded with microSD flash drives up to 128 GB. A good tablet from Lenovo uses a MediaTek MT8167 processor, which has 4 cores with a frequency of 1300 MHz each. This stone is complemented by the PowerVR GE8300 graphics accelerator.

In reviews, the Tab 4 TB-7304F tablet computer is criticized only for various pre-installed “garbage”. The battery life of the device is very good (3450 mAh battery). In addition, in addition to the energy-efficient hardware platform, it uses an IPS display with a resolution of 1024 by 600 pixels, which also reduces battery consumption.

Advantages:

• high-quality assembly;
• good color rendering;
• optimal parameters;
• good autonomy.

Flaws:

• branded applications;
• little permanent memory.

Samsung Galaxy Tab A 7.0 SM-T285

This ergonomic and popular tablet from the Samsung brand stands out from its competitors with its elegant contours and modern functionality, taking into account excellent technical characteristics.
The thickness of this compact device is only 8.7 mm, so it is easy to take with you on the road. A 5 MP camera with autofocus will give you the opportunity to capture the best moments of life. The battery here has a decent capacity of 4000 mAh, RAM – 1.5 GB, and its memory can be expanded up to 200 GB using a microSDXC card. The device can handle many modern applications and games, as it is equipped with a powerful 4-core Qualcomm processor at 1.5 GHz. Advantages:

• bright and clear TFT screen (1280x800 pixels)
• 3G/4G support
• made from materials that are pleasant to the touch
• sensitive touchscreen.

Flaws:

• own memory – 8 GB
• takes a long time to charge using the original adapter

Best 9.7-inch tablets 2021

When the very first iPad appeared (this happened in 2010), there were practically no tablets on the market, and the demand for them was almost zero. It was after the advent of the iPad that tablets began to be in demand. The first version of the iPad had a 9.7-inch screen, which is probably why this format remains quite popular. So, what 9.7-inch tablets are there on the market?

Apple iPad Air 2 64Gb Wi-Fi + Cellular

We will start, of course, with the iPad, which became the progenitor of a whole class of tablets.

The Apple iPad Air 2 64Gb Wi-Fi + Cellular model has a 9.7-inch diagonal screen with a resolution of 2048×1536 pixels, an Apple A8X processor, 2 GB of RAM and 64 GB of internal memory.

Apple devices do not have a memory card slot, so we recommend that you think about the amount of memory when purchasing.

This version has 3G support.

• Screen diagonal: 9.7 inches

• Screen resolution: 2048×1536

• Weight: 444 g

• Processor: Apple A8X

• Memory capacity: 64 GB

• RAM capacity: 2 GB

• Battery capacity: 7340 mAh

• Main camera: 8 MP

• Memory card support: no

• Data transmission: Wi-Fi 802.11ac, WiFi Direct, 3G, EDGE, HSCSD, HSDPA, HSUPA, HSPA+, GPRS, GSM900, GSM1800, GSM1900, LTE

Samsung Galaxy Tab S2 9.7 SM-T819 LTE ​​32Gb

An interesting tablet with the same screen diagonal from Samsung. It has the same screen resolution (2048x1536 pixels), Qualcomm Snapdragon 652 processor, 3 GB of RAM and 32 GB of internal memory. There is a slot for memory cards.

The device is excellent in every way. There is LTE support, an 8 MP main camera, and the firmware is based on Android 6.0, which will certainly please those buyers who like the latest software versions.

Among the unusual features, we can note a fingerprint scanner - so far they are not so common on tablets.

• Screen diagonal: 9.7 inches

• Screen resolution: 2048×1536

• Weight: 386 g

• Processor: Qualcomm Snapdragon 652

• Memory capacity: 32 GB

• RAM capacity: 3 GB

• Battery capacity: 5870 mAh

• Main camera: 8 MP

• Memory card support: yes

• Data transmission: Wi-Fi 802.11ac, WiFi Direct, 3G, EDGE, HSDPA, HSUPA, HSPA+, GPRS, GSM900, GSM1800, GSM1900, LTE (B1(2100), B2(1900), B3(1800), B4(AWS ), B5(850), B7(2600), B8(900), B17(700), B20(800))

ASUS ZenPad 10 Z500M 64Gb

An excellent tablet from ASUS, a very powerful device.

Screen resolution: 2048×1536 pixels. It runs on Android 6.0 OS, is built on a MediaTek MT8176 processor, has 4 GB of RAM, 64 GB of internal memory, and also has a slot for a memory card. The battery capacity is as much as 5900 mAh.

Alas, despite the excellent characteristics, there is no slot for a SIM card, which means the device does not support mobile Internet.

• Screen diagonal: 9.7 inches

• Screen resolution: 2048×1536

• Weight: 430 g

• Processor: MediaTek MT8176

• Memory capacity: 64 GB

• RAM capacity: 4 GB

• Battery capacity: 5900 mAh

• Main camera: 8 MP

• Memory card support: yes

• Data transfer: Wi-Fi 802.11ac, Miracast

Samsung Galaxy Tab A 9.7 SM-T555 16Gb

Another tablet from Samsung, but simpler and, accordingly, cheaper. So, the screen resolution here is only 1024x768 pixels. This is not to say that this is not enough, but we recommend holding the device in your hands before purchasing, because the pixel density may seem low.

The tablet is built on a Qualcomm Snapdragon 410 processor, there is 2 GB of RAM and 16 built-in. There is support for memory cards.

The model features support for 3G and 4G networks.

• Screen diagonal: 9.7 inches

• Screen resolution: 1024×768

• Weight: 457 g

• Processor: Qualcomm Snapdragon 410

• Memory capacity: 16 GB

• RAM capacity: 2 GB

• Battery capacity: 6000 mAh

• Main camera: 5 MP

• Memory card support: yes

• Data transmission: Wi-Fi 802.11n, WiFi Direct, 3G, LTE

Apple iPad Air 2 16Gb Wi-Fi

A less expensive version of the iPad 2, it lacks 3G support and has less memory. But everything else is no different. If necessary, you can save a lot on your purchase if, for example, you do not need mobile Internet.

• Screen diagonal: 9.7 inches

• Screen resolution: 2048×1536

• Weight: 437 g

• Processor: Apple A8X

• Memory capacity: 16 GB

• RAM capacity: 2 GB

• Battery capacity: 7340 mAh

• Main camera: 8 MP

• Memory card support: no

• Data transfer: Wi-Fi 802.11ac, WiFi Direct

Teclast X98 Air Plus

An unusual device from Teclast. What’s unusual is that it supports two operating systems - Android and the mobile version of Windows, that is, you can use any of the operating systems to choose from.

Teclast X98 Air Plus is based on Intel Atom x5 Z8300. The volume of internal memory is 64 GB, and RAM is as much as 4 GB. Screen resolution is the same 2048×1536 pixels.

This version does not support 3G.

• Screen diagonal: 9.7 inches

• Screen resolution: 2048×1536

• Weight: 510 g

• Processor: Intel Atom x5 Z8300

• Memory capacity: 64 GB

• RAM capacity: 4 GB

• Battery capacity: 8000 mAh

• Main camera: 5 MP

• Memory card support: yes

• Data transfer: Wi-Fi 802.11n

TELEFUNKEN TF-MID9705RG

An inexpensive solution from TELEFUNKEN, built on the RockChip RK3188 processor. The volume of RAM is 2 GB, internal memory is 16 GB.

Despite the low price, the screen resolution is 2048x1536 pixels, which is an excellent result.

The device supports 3G networks and has a battery capacity of 8000 mAh.

• Screen diagonal: 9.7 inches

• Screen resolution: 2048×1536

• Weight: 700 g

• Processor: RockChip RK3188

• Memory capacity: 16 GB

• RAM capacity: 2 GB

• Battery capacity: 8000 mAh

• Main camera: 5 MP

• Memory card support: yes

• Data transmission: Wi-Fi 802.11n, 3G

Sources

• https://tv-vybor.ru/stati/113-diagonal-televizora-v-djujmah-i-santimetrah.html
• https://technosovet.ru/czifrovaya-tehnika/planshety/razmery-v-dyujmah-i-santimetrah
• https://FB.ru/article/323007/skolko-eto—diagonal-dyuymov-kak-perevesti-v-santimetryi
• https://ProNormy.ru/tekhnika/bytovaya/7-dyuymov-eto-skolko-santimetrov-ekran
• https://setafi.com/elektronika/planshet/razmery-planshetov-v-dyujmah-i-santimetrah-tablitsa/
• https://expert-kachestva.ru/luchshie-tovary/computers/10-luchshix-planshetov-s-ekranom-7-dyujmov.html
• https://androidnik.ru/luchshie-planshety-s-ekranom-97-dyujma/

Cell phones

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

The popular smartphone iPhone 7 has a diagonal of 4.7 inches (almost 5), and the new Korean flagship Samsung 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.