How to calculate the number of floor tile inserts. How to calculate how many tiles you need for the bathroom: we repair it economically Calculate the tiles on the floor using the program
One of the most significant repair issues is the correct calculation of the material, especially when it comes to how to calculate the number of tiles. And if the other finishing material it is easy to buy, then in the case of tiles, such an opportunity may not be.
It should be said right away that the correct calculation of the tile is an opportunity to save yourself not only from buying unnecessary material, but also from a more serious problem associated with a lack of tiles. The problem is that modern production tiles are a rather complex and, if I may say so, an inconstant process, therefore tiles from the same collection in different batches have significant differences in colors, geometry of the ornament and other technical parameters. You don't need to be an expert to understand how this will affect the design of the entire interior.
It is also worth noting that a lack of experience in taking measurements and calculating the area of a room often leads to incorrect calculations; this issue must be taken no less seriously.
Unfortunately, a single and unchanged calculation formula tile does not exist, since in each individual case everything depends on several factors: the size and features of the layout of the room, the dimensions of the tiles and the layout option. But, in general, the calculation schemes will be similar, and you can understand them at simple example... In this case, the average dimensions of the room and material are taken as a basis. The dimensions of the bathroom are 1.73 × 1.73 m, with a ceiling height of 2.6 m. There are no boxes or niches in the bathroom, and only the door is from the openings.
The tiles are laid out vertically in the standard way: dark bottom, border and light top with several decors. The dimensions of the floor tiles are 0.335 × 0.335 m; wall - 0.3 × 0.2 m; frieze dimensions - 0.08 × 0.2 m
There are two ways to calculate floor tiles. Some masters define required amount tiles by area.
Bathroom floor tiles
To do this, you need to know the total square of the room, which is calculated using standard geometric formulas, in this case for a square: 1.73 × 1.73 = 3.46 m2, the number is rounded up and an area of 3.5 m2 is obtained. Next, you need to find out the area of one floor tiles: 0.335 × 0.335 = 0.112 m2.
Now they determine how many whole tiles are needed to pave the entire area: 3.5 / 0.112 = 31.2 pcs. The quantity is rounded up to 32 and 10% is added for scrap and trimming, in the case of a diagonal layout - 15%. The total is 35 or 37 tiles, respectively.
The second method is considered more accurate, the tiles are calculated by the piece. Calculate how many tiles will fit along one side of the floor (width): 1.73 / 0.335 = 5.2 round up to 6. Now calculate the number of tiles that will fit along the adjacent wall (floor length): 1.73 / 0.335 = 5, 2 are also rounded to 6, in this case the result is the same. From the calculations it can be seen that 5 whole tiles and trim will be laid along each of the walls.
Now they will find out how much material is required: 6 × 6 = 36 pieces. Taking into account the fact that when rounding off the number increased by almost one, the correction for battle and marriage is introduced only in the case of a diagonal layout - 5%.
Wall tiles
In order to calculate the required number of tiles for the walls, you need to know the perimeter of the bathroom: (1.73 + 1.73) 2 = 6.92 m, round up to 7 m.Now, knowing the length of one tile, they calculate how many pieces will be laid in one row around the perimeter of the room 7 / 0.2 = 35 pcs.
The layout of the tiles in this case implies a dark bottom, it is usually raised to a height of about 1 m.But since there is no need for trimming, the height may vary depending on the dimensions of the selected tile: 1 / 0.3 = 33, three rows will be the best option.
Determine the total number of dark tiles in three rows: 35 × 3 = 105, add 3 pieces per battle, for a total of 108 dark tiles.
Dark and light tiles are usually separated by a border. The length of the frieze in this case is similar to the length of the tile - 0.2 m, but it fits only in one row, that is, 35 elements are required to lay out the border around the perimeter.
Now you need to calculate the number of rows of light tiles and their total. It is known that the height of the room is 2.6 m, the height of the dark layer is 0.9 m, and the height of the border is 00.8 m. It turns out 2.6 - 0.9 - 00.8 = 1.62 m - the height of the light layer. The resulting number is divided by the height of the tile and the number of rows is 1.62 / 0.3 = 5.4, that is, 5 rows of a whole tile and a cut under the ceiling.
Find out the total number of light tiles 35 × 5.4 = 189. In this case, the number need not be rounded to 6, since less than half of one tile is used for trimming in the last row. 4 spare tiles are also added to the total.
The tile layout assumes the presence of decors in a bright area, only 3 pieces on three walls and 2 elements on a wall with a doorway. Total: (3 × 3) + 2 = 11 elements. This number must be subtracted from the total number of light tiles 193-11 = 182.
Dark bottom, light top - classic
When calculating wall tiles, do not forget about the presence of a doorway, its height is 2 m, width is 0.7 m. A certain number of tiles can be safely subtracted from the total and save a little.
First, they find out how many whole tiles fit on the height of the opening in one row: 2 / 0.3 = 6.6, here they are rounded down to 6 pieces. Now count the number of tiles per door width: 0.7 / 0.2 = 3.5, also round down to 3 tiles.
It is known that the height of the dark layer is 3 rows, 3 × 3 = 9 dark tiles. The frieze has the same length as the tile, respectively, 3 elements fit the width of the doorway.
Now calculate the number of rows of solid light tiles (2-0.9-0.08) / 0.3 = 3.4, that is, 3 rows of light tiles. Determine the number of light tiles that can be subtracted: 3 × 3 = 9 pcs.
The number of extra tiles for window openings as well as for areas that will not be tiled, for example, behind the bathroom.
The final result
- Floor tiles will be required - 36 pcs.;
- Dark tile - 94 pieces + 3 spare;
- Light tiles - 169 pieces + 4 pieces. spare;
- Friezes - 32 pieces + 1 piece. in reserve;
- Decors - 11 pcs. + 1 spare.
Advice! Among the more modern and convenient calculation methods, software is now especially popular. Online services enable the user not only to calculate the number of tiles and consumables, but also to create a 3D visualization of the bathtub with a future layout. The only problem is that some manufacturers and collections may not be in the program database.
Programs for calculating tiles in the bathroom
Calculation of consumables
In addition to tiles, you will also need consumables: glue, grout and installation crosses. The latter are sold in packs of 50 pieces, this amount is quite enough. As for glue and grout, it is rarely possible to calculate them perfectly accurately, but it is also easier to buy material in addition than tiles.
Tile adhesive consumption
Average material consumption using the example of Ceresit glue
The consumption of tile adhesive largely depends on the evenness of the walls, which, in practice, usually have to be leveled, and the thickness of the adhesive layer varies greatly. Also, the amount of glue is influenced by the laying technology, brand and composition, manufacturer, masonry technique, type of tile and even temperature conditions.
There are several such methods, each is good in its own way. But, from the point of view of the calculation and the process itself, the simplest is invariably straight masonry.
Direct tiling
Standard for everyone, familiar masonry, this method can be recommended for beginners.
Advice! If the ceiling in the room is low, then it is worth choosing a high rectangular tile and laying it in a straight line. This will visually "lift" the walls.
For a high-quality styling diagonally, you will have to sweat. But the result is worth it. It should be noted that the diagonal masonry visually hides the curvature of the floors.
Important! Laying tiles diagonally requires additional material consumption, since you have to cut a lot of tiles, moving from the corners in the center of the room. But do not rush to throw out the leftovers, suddenly they will be useful to you in another corner of the room.
Laying tiles with a checkerboard pattern
This option is usually used when you want to lay ceramic tiles in several colors. The result is very interesting bathrooms in terms of design, worth a try.
Offset tiling
Such laying implies the displacement of each subsequent row by the same distance. This option looks more sophisticated and you can always experiment with various inserts, for example, use small square tiles, as was done in the photo.
How to calculate bathroom tiles
So, in order to avoid unwanted losses, we need to measure the walls and floor.
On a piece of paper, write measurements along all the walls of the room, subtracting windows and doors. You can safely go to the store and choose the tiles you need. Measure the tiles and write down the measurements for yourself. Now we can calculate how many tiles we need.
There are two ways of calculating - separately by length and width, or by area.
We count the number of tiles (1 way)
To calculate the required number of tiles, first, we need to measure the length and width of the surface.
Now we divide the height of the wall by the height of the tile. At this stage, you should already decide how you lay the tiles, if they have a rectangular shape - horizontally or vertically. If you put tiles on the floor, we measure the length of the floor, the length of the tile accordingly.
For example, the height of the wall is 2.7 m, the height of the tiles is 0.3 m.
2.7 / 0.3 = 9 tiles
That is, 9 tiles fit in a row in height.
2.25 / 0.2 = 11.25 tiles
When the number is not an integer, we always round up, we have it up to 12. We get the number of tiles in width.
9 * 12 = 108 tiles
But this is not the final number, since 5% of the stock should be added to the amount received:
108 * 1.05 = 113.4 tiles
We round it up and thus we get 114 tiles on a given surface.
We also do similar calculations for the rest of the walls, add up the results and have the total number of tiles per room.
We take into account the doorway and window frame
In order to get the number of tiles required for the wall in which the door or window is installed, we need to subtract the number of tiles from the number of tiles on the opposite wall, which falls on the size of the door or window opening.
Divide the height of the opening by the height of the tile:
2 / 0.3 = 6.7 tiles
round down - 6 pcs. in height. We round down, in order to subtract a smaller number of tiles and you still have a margin.
0.8 / 0.2 = 4 tiles
We multiply the obtained results and get 24 pieces, which we subtract from the total number of wall tiles. In a similar way, we can calculate the number of tiles for a wall with a window.
We calculate by area (2 way)
We measure the area of the floor (wall) by multiplying the length (height) by the width:
0.33 * 0.33 = 0.1089 square meters
After that, we divide the floor area by the tile area:
4.5 / 0.1089 = 41.32 tiles
As you can see, we get an approximate number of tiles, so we round up, we have up to 42 tiles.
But don't forget to add 5% to the stock.
42 * 1.05 = 44.1 tiles
We round it up and in this way, for laying tiles on the floor, we get 45 tiles.
Advice! Sales consultants prefer to count it in the second way - by area.
If it is decided to put tiles on the floor, then the first step is to go around all the hardware stores. Then looks closely suitable option... And here many understand that the most terrible difficulties are yet to come. The main question arises - how to calculate ceramic tiles for the floor and how much to buy so that there is nothing superfluous left.
What is it for
The thing is that the process of laying floor tiles is more complicated than also wallpapering the walls. Most people who very rarely encounter major repairs are sure that it is enough to purchase such an amount that the material is barely enough, and if not enough, then purchase the missing amount. But professionals don't recommend this approach.
The production technology of such a material as ceramics is rather complicated. In different batches of products, the same pattern from the same manufacturer or brand may have different shades. It is far from a fact that it will be possible to purchase tiles with the required shade.
You can easily get out of this situation if you buy ceramics with a margin, however, the cost of high-quality tiles is quite high, and if there is a lot of material left after the work, it is unlikely that you will be able to hand it back. Keeping it at home is also a bad option. There is only one correct way out - it is to spend an hour of time and calculate the amount ceramic tiles on the floor.
We start the calculation
There are simply no unique ways and formulas. The thing is that the final amount of materials depends on a huge number of factors. Many will say that it is enough to know the area of the room - but not everything is so simple. It is very important what configuration the subfloor has, what the final floor is planned, what size one tile has, is the base ideal for the laying process, and of course, the pattern is very important.
Method number 1
First of all, let's see how you can count the tiles in the bathroom on the floor. The house is a typical high-rise building. Often, in standard rooms the size of the bathroom is approximately 1.75 mx 1.7 m. Imagine that this room has a classic rectangular shape without any protrusions or niches. Let the tile also be standard size- 333 x 333 mm.
Then the area is read, 1.75 m is multiplied by 1.7. The result is 2.975 m. This value can be safely rounded up to 3 m2. So, according to preliminary calculations, it turns out that only 27 whole tiles will be needed for finishing. However, there are nuances here - it is necessary to count one by one.
To do this, the width of the rectangle is divided by one of the sides of the ceramic tile - 1.7 m / 0.333 mm = 5.1 pcs. This value can also be rounded off - the result is 5.5 pieces. Then, the same calculations are performed for the other side. After rounding, the same figure is obtained - 5.5 pcs.
Next, you should multiply the results obtained. So, 5.5 x 5.5 = 30.25 pcs. You can round the value up again. So the end result is 31 tiles. As you can see from these calculations, the results differ greatly by as much as 4 pieces. It is not at all necessary that the length of the row in the process of laying be a multiple of the length of one tile. Using this method, you can calculate the exact number of tiles for any floor.
In addition, production defects, as well as various waste, should be taken into account, because when laying the tiles, you will have to cut them. It is worth adding to this also different niches in the room, as well as ledges. They can be quite complex configurations. As a result, it is worth taking 34 pieces. The most economical installation method is the seam-to-seam method without any movement. However, here, too, an allowance for various costs is required.
When laying, you should not try to make seams along the lines of the walls. If the wall is not too even, then visually, along the cut, this unevenness will be strongly visible.
If you decide to do all the work yourself, and not use the help of qualified specialists, but you have no experience in this matter, you should not take on complex ornaments and drawings. It is best to start with the classic solutions - joint to joint.
Method number 2
The first way is simple. And the second one is even simpler and is suitable even for lazy craftsmen. In many building supermarkets, as well as on decent online stores, you can calculate the tiles for the floor using a special calculator. This is a simple program that can make your life much easier.
However, the calculator will only help you perform the necessary calculations. All the same, you will have to make accurate measurements of the premises, otherwise inaccurate dimensions can lead to an incorrect result. And such calculators are needed for accurate calculations. The best option, of course, is to count everything manually. Then, having received the final figure, you can check with the program. If there are minor discrepancies, then everything is correct.
Method number 3
This method can be used when laying tiles with a rather complex pattern. It can be a herringbone or the pattern runs diagonally across the tile. Also, this method is suitable if the floor does not have the shape of any regular geometric figure.
Naturally, you can divide the floor surface into more simple shapes, and then perform the calculation according to the first method for each piece separately, and then simply add up the results obtained and calculate the required amount of material with a minimum 15% margin. However, this is not an accurate and time consuming option.
Tile laying specialists, based on work experience, recommend using a sheet in a box or graph paper. An exact copy of the floor is drawn on it on a convenient scale. Then, according to the conceived drawing (while observing the scale), you should draw where exactly each tile will be laid.
After that, all solid tiles are counted, and marks are set on the plan. Tiles that will then be cut in less than half are marked separately, since 1 tile (if cut) can be laid in two places.
Thus, you can find out exactly how many ceramic tiles are needed to finish the floor in any room. It is very convenient to know this figure in advance - then you can purchase the strictly necessary amount of material and a little more in case of marriage.
We count the consumption of glue
When laying ceramic tiles, many factors affect the consumption of glue. This is the type of tile, its thickness, the quality of the base and the technology of laying. Also, the consumption is significantly influenced by the type and brand of adhesive, the weather, the qualifications of the master.
The tile can be porous, hygroscopic. The base may not be level enough. Porous tiles will be able to absorb more adhesive solution than glazed tiles. Many manufacturers offer to purchase an all-purpose adhesive that is suitable for different types ceramics. You should pay attention not to products with an uneven surface - a lot of glue is needed for such a tile.
Ceramic tiles of large size and weight will increase consumption. So, for a product of 10 × 10 cm with a layer of adhesive solution, it should be 2 mm. If the tile has a size of 20 × 30, then it will be from 2 to 3 mm. For all products that are larger, the glue layer is 4 to 5 mm.
The base on which the tiles will be laid should be as flat as possible. If the height differences are up to 3 mm, then thin-layer laying technology can be applied. Here, the glue is applied in a thin layer only so that the tile adheres to the base. If the elevation differences are large, then the layer thickness will be greater. but modern manufacturers produce special leveling compounds. They are applied in a layer up to 3 cm. This is a thick layer technology.
The first method involves a special calculator, which must be found on the manufacturer's website. With its help, it is easy to determine the amount of adhesive solution per 1 m2 and for the entire area of the room. You just need to provide the program with information about the brand of adhesive, surface area and type of tile. The result is given in kilograms.
In the second option, you will have to count manually. If you need to know the amount of glue per 1 m2, you need to take half the thickness of the tile and the average consumption of the adhesive. These numbers must be multiplied and the result will be ready. But, it should be borne in mind that the figures obtained are not very accurate.
According to the third method, the consumption of cement-based glue is considered. These formulations are best purchased in 1.3 kg bags. So, its weight of 1.3 kg should be multiplied by the thickness of the glue. The number in the end will be the desired expense.
Average consumption is written on the bag. However, this figure is based on an ideal substrate and a 3 mm thick adhesive layer. For example, for 21 sq. m. about 76 kg of the mixture can be consumed. However, in apartments, the ideal subfloor is still worth looking for. Therefore, the glue must be purchased in large quantities... But this is not entirely important, because the material can be purchased at any convenient time.
We consider the consumption of grout
Grouting is the last step in the installation. To correctly calculate the amount of grouting materials, you can use a simple formula.
So, take half of the perimeter of one tile and divide this figure by the area of the same tile. After that, the resulting figure is multiplied by the thickness. The result is multiplied by the joint width and then multiplied by the shrinkage factor again. This coefficient is 1.5. As a result, the required mass of materials per 1 m2 in kg is obtained. So, if the seam is 2 × 3 mm, the tile area is 0.04 m2, then judging by the calculations, 1 kg of grout mixture should be enough for 3.5 sq. m.
Any work related to repairs in an apartment begins with the choice of the design of the room and the selection necessary materials to bring the idea to life. Next, you need to calculate the required amount of paint, wallpaper and everything else that may come in handy. Sometimes novice craftsmen have a question that belongs to the category of very important - how to calculate the tiles for the floor? Let's figure out how this is done.
In hardware stores, there are now on sale different kinds tile. They differ not only in texture and color, but also in size - there are tiles, both large and small. Among all the variety, there is sure to be the option that will suit the owner of the apartment both externally and in quality. But it is not enough just to choose a tile in accordance with its decorative data, you need to correctly calculate the amount required for finishing a particular room.
Previously, tiles were often bought for future use, since they were in short supply as a material. Now you can safely buy only the amount that is needed at the moment. This allows you to save cash and spend them on some other types of materials that may come in handy during the renovation. Moreover, you can even count the number of tiles with an accuracy of one piece.
Advice! When buying such a fragile material as ceramic tiles, you should always provide a small margin. It will be needed in case when during transportation or directly during renovation works part of the tile will be damaged. Damaged elements cannot be used to decorate the premises.
Wallpaper the walls, decorate the floors with laminate or self-leveling floors much easier than laying ceramic tiles. Therefore, the main advice for a beginner is that you need to purchase tiles with a small margin. Firstly, the reason for this is that the material is fragile and it is easy to break it with one careless movement. Secondly, tiles, even in one batch, may differ in color or texture, have a somewhat non-standard shape.
The correct calculation of the number of tiles is the determination of the required number of elements for finishing a specific place in the house, subject to a minimum error or rounding the required number up. It is in this case that it will be possible to avoid the fact that there is not enough material and will have to go back to the store in search of the missing elements. The number of tiles is never determined by eye.
Despite the fact that doing the calculations seems to be a fairly simple procedure, there are some subtleties here. For example, it is important to take into account the size of the room where the renovation is being carried out, the type of tile installation chosen, as well as the shape and dimensions. It is also worth remembering that some elements will have to be cut, that is, not used whole.
Advice! The area of the floor located under the bathroom can be omitted by determining the number of tiles. It will not be visible there anyway, but it will be possible to save good money on the purchase of ceramics, since this material is not cheap.
How to calculate floor tiles - basic methods
You can determine the required number of tiles using one of several methods. They are applicable in all cases, even if the room where the floor is formed has non-standard geometry. Of these, the one that seems the most convenient to the master is selected. Let's get acquainted with the methods of calculating the number of ceramic elements.
Important! To carry out calculations, you already need to know what sizes the tiles will be placed in the room. And here it is important to take into account the chosen masonry pattern, as well as whether there is any pattern on the ceramic elements themselves.
By the area of the room
The most understandable and familiar method is to determine the consumption of tiles in square meters, that is, by the area of the room. This method is ideal for installing single-color ceramics, of one size, as well as for simple or diagonal installation, or with an offset.
First, the area of the room is determined. It is easiest to identify it if the room has a geometrically regular shape - a square or a rectangle. In this case, the length of the room is simply multiplied by the width. Measurements are taken with a tape measure along the walls of the room.
Further, the resulting value - the area of the room - should be increased by about 10%. This will make it possible to make the necessary stock of material (10% can be added after all calculations have been made). The total value is divided by the area of one tile (this is also the length and width of the ceramic product, multiplied by each other) - the number of elements that will be required for work is obtained.
If it is necessary to cover the base with tiles, it is sufficient big size, then you can count the tiles in batches. To do this, you need to know how many square meters the cover will cover when packed in one box. Then the value of the area of the room with a margin can be divided by the area of the covering, laid in one pack - the result will be the number of boxes of tiles.
On a note! If the total value in one way or another is fractional, then it is always rounded up only.
A more accurate calculation of the area can be made if the tiles are counted by the piece. If the room has complex geometry, then you will have to tinker with the calculations. For example, you can conditionally divide it into regular geometric shapes and find out the area of each of them, then add the values and get a figure equal to the area of the entire floor in the room. You can also use various geometric formulas that were studied in school.
Calculator for calculating the area of a quadrangular room
27/11/2018
ORRO Mosaic salon
The tile is the most suitable material for finishing sanitary facilities, but also quite expensive. Therefore, so that you do not have to buy it or throw away the excess, you need to correctly calculate the tiles for the bathroom.
The correct calculation of the tiles during the repair allows you to save not only the time spent on the purchase of missing materials, which, it should be said, may not be in the store, but also the funds that will be spent on surplus.
In order to calculate the number of bathroom tiles, first you need to answer the following questions:
- What type of styling will you use;
- What color range you plan to apply;
- Will you need to fit the pattern; Will you only lay tiles on the walls or add decorative elements to the finish?
Choosing the type of styling
When working with floor tiles the following types of styling are commonly used:
- standard - when the edges of the tiles are laid along the walls;
- diagonal - the edges are stacked at an angle of 45 degrees;
- diagonal checkerboard - when laying ceramics of different colors, they alternate.
When laying tiles on walls, the following types of cladding are traditionally chosen:
- the usual "straight" - when the elements are laid parallel to the floor;
- usual with borders (one wide or narrow and wide, alternating);
- diagonal;
- checkerboard (normal direction or diagonal).
The choice of the type of stacking is important, because in the diagonal direction the consumption of material increases, because you will have to do a lot of trimming the corners of the tiles to fit from the center to the corners of the walls. When fitting to a pattern, you will also have to do a lot of trimming. And it is also necessary to take into account that it is better to do the joints of the first rows away from the walls, so that possible irregularities in the wall are not striking.
Measurement of the room
Before calculating the tiles, it is important to correctly measure the room. It is performed after the walls are prepared for laying the tiles. Each side is always measured separately, even if the room is of the correct shape. Round the resulting value up.
When a room has a complex configuration, has protruding elements, niches or boxes, they are measured separately. It is better to write down all the results by drawing up a plan of the room on a scale on which the location of plumbing, furniture and other interior details is noted. For a more accurate calculation, it is better to convert all numbers to millimeters.
General rules for calculating the required amount of tiles
There are general rules on how to correctly calculate the number of tiles, even for a bathroom, at least for other rooms where you decide to lay tiles.
- Measure the length and height of each wall on which you will tile, and the length and width of the floor;
- From the dimensions of the wall in which Entrance door(or which has a bathtub) subtract the dimensions of this door (bathtub);
- Decide on the size of the tiles that you will lay (on the floor - 30x30, 33x33, 40x40 cm, etc .; facing - 20x30, 25x33 cm, etc.);
- Calculate the result in square meters in advance, and for clarification and accurate calculation, count the number of tiles by the piece.
And keep in mind that the required amount of building materials must be immediately increased by 10%, because such a stock will be required for trimming at the edges of the walls, in case of careless damage to tiles or cosmetic repairs of some section of the wall (floor) in the future.
We lay tiles on the floor: an example of calculation
As an example, consider the exact calculation of the required number of tiles for laying on the floor.
Let's take the following data as initial data:
- Floor width - 150 cm
- Length - 170 cm
- Product size - 33x33 cm
- Laying of the standard type, tiles of the same color.
To find out how many tiles you need, first divide the floor width (150 cm) by its side (33 cm), we get the result - 4.54 (the number of tiles in one row in width), round up to a whole - 5 pieces. Now let's calculate how many such rows are needed along the length of the bathroom: we divide 170 cm by 33 cm, we get 5.15 rows, round up to 6. Next, we multiply 5 tiles in one row by 6 rows, we get 30 pieces. We add 2-3 in reserve, which means we will buy 33 ceramic tiles.
If the calculation of the number of tiles was not made by piece, but by floor area, then a serious mistake would have been made.
Floor area - 1.70m x 1.50m = 2.55sq.m, divided by the area of one tile 0.33m x 0.33m = 0.11sq.m, we get 24 (rounded) pieces. That is, 6 tiles would not be enough for the floor (plus a supply). Indeed, when counting by the piece, the trimming of the plates during installation was actually taken into account.
Bathroom wall cladding
For example, divide 270 cm (wall height) by 30 cm (tile height) = 9 elements in one row in height. 150 cm (surface width) divided by 20 cm (product width) = 7.5 - round up = 8 pieces in width. We multiply 9 by 8, we get - 72 units measuring 30x20 cm are needed for one wall 150 cm wide. By similar calculations for a wall 170 cm long, we get the result - 81 tiles.
We take into account the doorway
To calculate the amount of tiles required for facing the wall in which the door is installed, it is necessary to subtract the amount that falls on the dimensions of the doorway from the number of elements for the opposite wall. For example, 200 cm (doorway height) is divided by 30 cm (tile height), we get 6.7 - round down = 6 pieces in height; We divide 70 cm (opening width) by 20 cm (product width), we get 3.5 - round down = 3 pieces in width. 6 multiplied by 3, we get 18 pieces, which we subtract from (for example) 81, we get 63 pieces. If the wall, which will have a bathtub, you will cover it completely, then the number of tiles on it is easy to calculate. If you do not plan to cover the space occupied by the bathroom, then the calculation for this wall is performed in the same way as for the wall with a door.
Calculating the amount of grout
After the completion of the laying work, grouting is performed. To do this, use a grout that matches the main color of the coating, and contrasting (white for black tiles, etc.). To calculate the amount of grout for tiles, you need to know the amount of space to be filled.
To calculate the grout volume, divide half of the perimeter of 1 tile by its area and multiply by the thickness. Multiply the result by the seam width and 1.5 (factor). The result will be the mass (in kg) of grout required for 1 square meter of coverage.
For example, with a joint width of 2-3 mm and a tile area of 0.04 square meters, one kilogram of grout will be enough for you for 3.5 square meters.
conclusions
As a conclusion, we can say that determining the area for laying tiles is not always effective and accurate, especially with small rooms. It is also too difficult and impractical to apply the calculation formula in small rooms. It is better to make one-by-one calculations. In the above examples, for simplicity of calculation and understanding of its very principle, the dimensions were taken as the initial data typical apartment and one-color ceramics without decor and borders. These examples are quite enough to calculate the required amount of tiles for different colors, when installing curbs.