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Sooner or later, you come across the fact that some values uXNUMXbuXNUMXbare indicated in inches. And to find out how much it is in centimeters, you need to convert inches to centimeters. You can calculate, find in a table, or use a converter application.
Inches (inches), designation
Part of the world measures sizes in inches and feet. In fact, meters, centimeters, millimeters are also usually used, but inches are more common. These are the units of measurement in the USA, Canada, Great Britain. And the rest follow after them. It so happened, for example, that the diagonals of TVs, screen sizes in smartphones, pipe diameters, shoe sizes (and much more) are indicated in inches. So you have to think about how to convert inches to centimeters, meters or millimeters.
First, let’s talk about how these inches are indicated. In English it is inch. If there are a lot of them (inches), they write inches. In the abbreviated version, only the first two letters are put in. It occurs in the text. There is also a graphic image – these are two dashes at the top near the number. For example: 3″, 5,2″. This is read as 3 inches, five and two inches.
Inch to centimeters, millimeters: how much is this?
To convert inches to centimeters, remember that one inch is 2,54 cm or 25,4 mm. The number is not so big, you can remember it or write it down somewhere.
Sometimes numbers just don’t want to stay in memory. Pictures can help, or you can try to imagine something that size. Probably everyone knows the fairy tale about Thumbelina. So, this fairy-tale character was one inch tall, that is, a little more than two and a half centimeters. Might help someone remember.
How to convert inch to centimeters
To convert inches to centimeters, you need to multiply them (inches) by 2,54. For example, you need to know
- 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.
In order not to count, there are tables for converting inches to centimeters. How to use it, probably, it makes no sense to say. Everyone knows about it.
Convert inches to centimeters and millimeters (cm and mm)
| Inches | Centimeters | Millimeters | Inches | Centimeters | Millimeters | Inches | Centimeters | Millimeters | Inches | Centimeters | Millimeters |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2,54 | 25,4 | 15 | 38,1 | 381 | 29 | 73,66 | 736,6 | 43 | 109,22 | 1092,2 |
| 2 | 5,08 | 50,8 | 16 | 40,64 | 406,4 | 30 | 76,2 | 762 | 44 | 111,76 | 1117,6 |
| 3 | 7,62 | 76,2 | 17 | 43,18 | 431,8 | 31 | 78,74 | 787,4 | 45 | 114,3 | 1143 |
| 4 | 10,16 | 101,6 | 18 | 45,72 | 457,2 | 32 | 81,28 | 812,8 | 46 | 116,84 | 1168,4 |
| 5 | 12,7 | 127 | 19 | 48,26 | 482,6 | 33 | 83,82 | 838,2 | 47 | 119,38 | 1193,8 |
| 6 | 15,24 | 152,4 | 20 | 50,8 | 508 | 34 | 96,36 | 963,6 | 48 | 121,92 | 1219,2 |
| 7 | 17,78 | 177,8 | 21 | 53,34 | 533,4 | 35 | 88,9 | 889 | 49 | 124,46 | 1244,6 |
| 8 | 20,32 | 203,2 | 22 | 55,88 | 558,6 | 36 | 91,44 | 914,4 | 50 | 127 | 1270 |
| 9 | 22,86 | 228,6 | 23 | 58,42 | 584,2 | 37 | 93,98 | 939,8 | 51 | 129,54 | 1295,4 |
| 10 | 25,4 | 254 | 24 | 60,96 | 609,6 | 38 | 96,52 | 965,2 | 52 | 132,08 | 1320,8 |
| 11 | 27,94 | 279,4 | 25 | 63,5 | 635 | 39 | 99,06 | 990,6 | 53 | 134,62 | 1346,2 |
| 12 | 30,48 | 304,8 | 26 | 66,04 | 660,4 | 40 | 101,6 | 1016 | 54 | 137,16 | 1371,6 |
| 13 | 33,02 | 330,2 | 27 | 68,58 | 685,8 | 41 | 104,14 | 1041,4 | 55 | 139,7 | 1397 |
| 14 | 35,56 | 356,6 | 28 | 71,12 | 711,2 | 42 | 106,68 | 1066,8 | 56 | 142,24 | 1422,4 |
Fractional inch conversion and table
But size is not always an integer. Often there are 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 large. So, of course, you have to count yourself. And you need to act in the same way: multiply the size in inches by 2,54 cm.
- 1,2 ″ translate 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 indicated by ordinary fractions, the translation is a little more complicated. It is necessary to divide 2,54 cm by the denominator (this is the figure that is at the bottom) and multiply by the numerator (the figure at the top of the fraction). Consider examples. So it will be clearer.
- 3/5″ is translated into centimeters as follows: 2,54 cm / 5 * 3 u1,524d 3 cm. That is, 5/1,52 inch is XNUMX cm.
- 1/4″ in centimeters is 2,54 / 4 * 1 = 0,635 cm, that is, it is 6,4 mm.
| Size in inches | Size in mm | Size in centimeters | Size in inches | Size in mm | Size in centimeters |
|---|---|---|---|---|---|
| 1 / 16 “ | 1.59 | 0.16 | 2 1/4 ″ | 57.2 | 5.7 |
| 1 / 8 “ | 3.18 | 0.32 | 2 3/8 ″ | 60.3 | 6.0 |
| 1 / 4 “ | 6.4 | 0.64 | 2 1/2 ″ | 63.5 | 6.4 |
| 3 / 8 “ | 9.5 | 0.95 | 2 5/8 ″ | 66.7 | 6.7 |
| 1 / 2 “ | 12.7 | 1.27 | 2 3/4 ″ | 69.8 | 7.0 |
| 5 / 8 “ | 15.9 | 1.6 | 2 7/8 ″ | 73.0 | 7.3 |
| 3 / 4 “ | 19.0 | 1.9 | 3″ | 76.2 | 7.6 |
| 7 / 8 “ | 22.2 | 2.22 | 3 1/8 ″ | 79.4 | 7.9 |
| 1″ | 25.4 | 2.54 | 3 1/4 ″ | 82.6 | 8.3 |
| 1 1/8 ″ | 28.6 | 2.9 | 3 3/8 ″ | 85.7 | 8.6 |
| 1 1/4 ″ | 31.6 | 3.2 | 3 1/2 ″ | 88.9 | 8.9 |
| 1 3/8 ″ | 34.9 | 3.5 | 3 5/8 ″ | 92.1 | 9.2 |
| 1 1/2 ″ | 38.1 | 3.8 | 3 3/4 ″ | 95.2 | 9.5 |
| 1 5/8 ″ | 41.3 | 4.1 | 3 7/8 ″ | 98.4 | 9.8 |
| 1 3/4 ″ | 44.4 | 4.4 | 4″ | 101.6 | 10.2 |
| 1 7/8 ″ | 47.6 | 4.8 | 4 1/8 ″ | 104.8 | 10.5 |
| 2″ | 50.8 | 5.1 | 4 1/4 ″ | 108.8 | 10.9 |
| 2 1/8 ″ | 54.0 | 5.4 | 4 3/8 ″ | 111.1 | 11.1 |
If the size is indicated as a correct fraction, that is, there is an integer and a fractional part – 2 1/3 ″ or 5 3/8 ″, to say how much it is in centimeters, multiply the integer part by 2,54, and proceed with the fractional part as described higher. Consider 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 the fractional part: 4/7 ″ is 2,54 / 7 * 4 = 1,45 cm. And now we add both results: 7,62 .1,45 cm + 9,07 cm = 3 cm. That is, 4 7/9,07″ equals XNUMX cm.
- Let’s move 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. In total we get: 5,08 cm + 1,69 cm = 6,77 .XNUMX cm
All these operations are easy. You will need a calculator, which is on any phone. If you don’t even want to count on a calculator, there are tables that show the most popular values. They can also be saved to your phone or printed out. In general, as you wish.
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 when translating centimeters, multiply by this number.
Which way is better? First. There are two reasons. The first is that it’s easier to keep one number in mind. Secondly, this method gives a more accurate result. Simply, when deriving the figure 0,39, the value was rounded off, which increases the error. To illustrate, let’s do a couple of translations.
We need 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 they were talking about. If you need a more accurate value, it is better to use the first method. It’s more accurate.
Let’s see one more example. 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 error. So if precision is important, use the division method.
Applications for converting inches to centimeters and vice versa
Using the calculator on your phone to convert inches to centimeters is the easiest. There are many more applications that allow you to do this almost automatically. All you need is to go to the Play Store and enter the query in the search bar: convert inches to centimeters. Drops out about a dozen applications.
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 on the same principle. First, choose what you want to translate into, then drive in the number you want to translate. The desired value is displayed on the screen. The truth is simple.