How to calculate how much bathroom tiles you need - formulas and example

Any repair begins with the purchase of the necessary materials. For facing work, it is important to make the correct calculation of tiles for the bathroom. Moreover, the possibility of an error must be excluded, since if there is a shortage of material, you will have to stop work and buy tile. If the goods were sold in limited quantities, then you may not find the same tile. It is also undesirable to acquire extra cladding material, since during the repair money is not enough to scatter them thoughtlessly. How to calculate: how many tiles do you need exactly? In principle, there is nothing complicated in the calculations. You just need to carefully measure the room, apply the measurements to a schematic drawing of the bathroom and armed with a calculator, perform several mathematical operations.

How to calculate the number of floor tiles

The length and width of the bathroom are measured with a tape measure, and the results are recorded on a piece of paper. Do not rely on a memory that can fail. In addition to these values, you need to know the dimensions of the floor tiles, which you decided to buy for the decoration of the room. Assume that a square floor tile with a side equal to 33 cm (0.33 m) is selected for laying. The dimensions of the bathroom should be equal to 1.7 by 1.75 m.

How to calculate the number of tiles for the bathroom

There are two ways to count:

1. Calculate the floor area by multiplying the length by the width of the bathroom: 1.7 * 1.75 = 2.975 (m²) Next, we calculate the area of ​​one tile, multiplying the sides: 0.33 * 0.33 = 0.1089 (m²) Then we divide the floor area by the tile area: 2.975: 0.1089 = 27.3 (pieces). As you can see, the result is approximate, so we round off the excess and get 28 tiles. However, always 5% of the stock is added to the estimated number. In our case, it is necessary to add two tiles (28 * 0.05 = 1.4 - round to two). Thus, we buy 30 tiles for the bathroom floor.
2. We calculate the number of tiles laid in length. To do this, divide the length of the bathroom on the side of the tile: 1.75: 0.33 = 5.3 (pcs.). We carry out the same action with the width of the room: 1.7: 0.33 = 5.15 (pcs.). This result is rounded to 5.2. The resulting results must be multiplied: 5.3 * 5.2 = 27.56 pieces, after rounding we get 28 pieces. We also add 5% and get the same result as in the first method, namely: 30 tiles.

Important! If the results are the same, then you can count in any way. In construction stores, sales consultants use the first method.

How to calculate tile for bathroom walls

In order to calculate the number of tiles required for cladding the walls of the bathroom, one must also measure the height of the room. The dimensions of the selected tile are 20 by 30 cm, the border is 8 by 20 cm. Suppose, in our example, the height of the bathroom is 2.7 m. You can calculate the number of tiles for each wall separately, and then add the resulting values. To reduce the number of operations, it is necessary to calculate the perimeter (the sum of all sides).

Moreover, the width of the doorway, which in our example is 0.6 m, should be subtracted from the perimeter. We get: (1.75 + 1.7) * 2-0.60 = 6.3. If the bottom of the walls will be finished with dark tiles, and the top will be light, and the border row will pass between them, then we divide the total height into three parts. We get: 2.7 - 0.08 = 2.62. The height of the dark "bottom" let it be equal to 1 m, then 1.62 remains to the height of the light "top".

• We calculate the number of dark tiles: the area of ​​the dark strip is 6.3 * 1 = 6.3 (m²) The area of ​​one tile: 0.2 * 0.3 = 0.06 (m²) Divide the values: 6.3: 0.06 = 105 (pcs.). Add 5%: 105 * 0.05 = 5.25 (pcs). Round to five. As a result, we get 110 dark tiles.
• We calculate the number of light tiles: the area of ​​the light strip is 6.3 * 1.62 = 10.206 (m²) Tile area already calculated: 0.06 (m²) Divide the area: 10.206: 0.06 = 170.1 (pieces). Round to 171 and calculate 5%: 171 * 0.05 = 8.55. You can take in stock and 8 pieces. But we must not forget about the space above the door: 0.6 * 0.7 = 0.42 (m²) Divide this number by the area of ​​the tile and get 7 tiles. As a result, we need 186 light tiles.
• We calculate the number of border elements: 6.3: 0.2 = 31.5 (pcs.). Round up to 32 pieces.

Use of decorative inserts

Important! If you plan to use decorative inserts sold individually, the number of main tiles is accordingly reduced. 

Now you know how to calculate the tile for the bathroom. If it is difficult for you to do the calculations yourself, then you can always count on the help of sales consultants.

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