How to calculate the amount of timber on the house on their
Many people think about building a country house, but most postpone it for tomorrow due to ignorance of how to calculate the amount of timber per house. Why? Yes, because the counting process itself is not free, and there’s no need to pay for something that isn’t possible.
Let's try with you to understand how to correctly calculate the amount of this product for the construction itself.

Calculation of the product for the construction of the building
Factors that affect numbers
The main thing to consider when calculating the amount of material for a house is:
- what type of timber will be used in construction;
- how much we need it;
- how many pieces in 1 cubic meter;
- What is the project log house or cottage.
Calculation of lumber in cubic meters
Consider how to calculate the number of timber in a cube in the simplest way, one can say, this is the basic principle of calculation. It should be noted that the above example is not accurate. To hold more accurate figures, you need to have a project of the future house.
So, attention instruction:
- Calculate the perimeter of the building.
- Multiply the perimeter to the height.
- The result is multiplied by the thickness of the product.
- As a result, the result is the number of cubes lumber required for the construction of the building.
To calculate the product for interior walls, use the same method. If you wish, you can calculate not only the volume of the material, but also its quantity in pieces. Consider a separate example of how to calculate the amount of timber per bath 3 meters by 5 meters and 3 meters high.
We agree that the construction will use the size of 150 by 150 mm.
Instruction:
- (3 width + 5 length)? 2 = 30 m - the perimeter of the building.
- 30 perimeter? 3 height = 90 sq.m - the area of the walls.
- 90 square? 0.15 material thickness = 13.5 cubic meters - it is necessary to build a box from a bar 3x5 in height 3m.
Thus, the amount of timber for walls is 13.5 cubic meters. But, it should be noted that window and door openings will reduce the amount of material used.
In most cases, the masters do not take into account this moment, it is believed that it will be even better to throw about 20% on the stock, in the end we will get:
- 13.5 + 20% = 16.2 cubic meters will be required for this type of building.
So we learned how to calculate the number of cubes of timber on the house.

Note! When building a house from a bar, the first crown should be slightly thicker than the main product used for walling. In our calculation it is not taken into account, it must be calculated separately. The first crown is made of a thicker one, since in the future the mass of the whole house will fall on it, it is additionally recommended to treat it with machine oil or an antiseptic.
Calculation in pieces
By calculating how many cubes of lumber for building a house, you can easily find out how much a bar is needed in pieces. You need it first when buying. Knowing the exact number of pieces, you will protect yourself from possible fraud on the part of the seller company.
Consider a table of common sizes of this product with a length of 6m:
100x100 | 1 шт. - 0.06 cub | 16.67 pcs. cubed |
100x150 | 1 шт. - 0.09 cub | 11.11 pieces cubed |
150x150 | 1 шт. - 0.135 cubic meters | 7.41 pcs. cubed |
100х200 | 1 шт. - 0.12 cubes | 8.33 pcs. cubed |
150х200 | 1 шт. - 0.18 cubes | 5.56 pcs. cubed |
200x200 | 1 шт. - 0.24 cubes | 4.17 pcs. cubed |
In the above example, where we designated the cubic capacity of the bar for the bath, we will conduct a further calculation of the materials in pieces.
So, to find out the amount of material for a house in pieces, we carry out the following calculation, for this amount 13.5 cubic meters, which is needed for building a bath, divide by the cubic volume of the used bar, in our case it is equal based on the table 0.135 cubic meter :
- 13.5: 0.135 = 100 pieces
Knowing the correct amount of the product in pieces, you do not have to run around with a tape measure and calculate the volume to find out whether you received the material on the invoice correctly, you will only need to calculate the product individually.

The role of height and material thickness
Before calculating the quantity, you need to decide on the choice of the thickness and height of the product.
The material may have a different thickness and height, we list the main dimensions:
- 100x100 мм.
- 100x150 mm.
- 150x150 mm
- 150x200 mm.
- 200x200 мм.
With height, everything is simple, the higher the bar, the less the inter-seam joints - construction work takes place faster, and naturally, the number of pieces of material for building a house decreases. But the width is more important, especially during construction for all-season living.

Note! Not all sawnwood producers are honest with the buyer, sometimes it happens that the timber of 150x150 mm actually has a size of 140x140 mm. It is not difficult to guess what this will lead to, if you need a beam of 150x150 mm 20 pieces to a height of 3 meters, then with a size of 140x140 mm there will be 21 pieces and a half, which is one and a half crowns.
When planning year-round living in the house is recommended to use a bar with a thickness of 200 mm. It is necessary to warm such walls, but for our climate there is enough insulation for a bar such as foam plastic or mineral wool 10 cm thick.
При строительстве бани рекомендуется использовать толщину материала 150 мм, ее вполне хватает для кратковременного поддержания температуры. Ну а если вы решили построить дачный домик для летнего отдыха, то в таком случае стены из бруса 100x100 мм будут в самый раз.

Tip! When building a wooden house, which does not plan to live all year round, the thickness of the timber is not important. After all, such a building is needed only for short-term use and mainly in the spring and autumn period.
Pay attention! Despite the large thickness of the product, you still have to insulate the walls. After all, in order for the house to fully fulfill its insulating properties, the thickness of the walls should be about 50 cm.
Why do you need a house project
When calculating the material for building a house, the project of the house itself plays an important role. After all, only in the finished project you can see not only the appearance of the building, but also the internal location of the walls and elements that need additional calculation of the necessary material.
You can get a wooden house project in different ways:
- do it yourself;
- order from a specialist;
- buy a finished project;
- buy online;
- find on the Internet a finished project of a house from a bar.
Do-it-yourself project at home is possible, but it is difficult, since you should have special knowledge. And it's not just about drawing a future home, you need to take into account the specifics of the climate, soil, air humidity and other moments.
The most correct solution is to order a project from a specialist, the price of such services is not cheap, but this is the best option, the specialist will take into account all your wishes and possibilities of the area. This will protect against many possible troubles, and it will also be with whom to ask if problems arise.

Tip! Do not buy projects on the Internet from unverified persons, most often they sell those projects that are posted on the Internet for public use.
Conclusion
So, you learned how to calculate the amount of timber for building a house. As can be seen from the article, it is not at all difficult to do. But do not forget to use the saying "Measure seven times, cut once."
Having made the right calculations, you will provide yourself with easy construction. It will not be necessary later to think about where to put the extra products or, worse, to suspend construction because of their shortage.
If you still have any questions, watch the video in this article, you will not only learn how to calculate the timber, but also be able to calculate the approximate cost of the future house. You definitely will not have any doubts about their ability to calculate the material with their own hands.