Calculation of timber volume calculator. How to calculate the amount of timber per house using basic mathematics? Factors influencing the amount of timber required to build a house
Log house– this is relevant, but not always convenient, since the walls need to be leveled with cladding; a wooden profile is much more practical, so sometimes it’s better calculate the amount of timber per house.
What do you need to know to calculate the amount of timber for a house?
– is this a little or a lot, and how many crowns of the house will this amount of timber be enough for? In fact, this is not so large number products of the woodworking industry. In particular, six-meter beams with a width and height of sides of 200 millimeters each will amount to only 4.17 pieces, or, since sellers like to round down, only 4 units. True, if you need more than 10 cubic meters, such rounding can play a cruel joke, and you will be missing one or even two lumber that you need so much. Therefore, you need to calculate the amount of timber per house as accurately as possible.
To begin with, determine the dimensions of the future building, that is, the length and height of the walls, the area of window and door openings, the step frequency of the crossbars (hardly in wooden house you will fill a monolithic concrete slab). You will also need to take into account the height rafter legs, and if the pediments are made in the same style as the building, then their geometry. In other words, immediately figure out where you will use the timber and include all the nuances in the calculations. Also immediately consider the options of using profiled, glued or unplaned beams; the latter are cheaper, but will decrease somewhat in size after processing on site.
Regarding overall dimensions, then from existing options with a section of 100x100, 150x100, 120x120, 140x140, 150x150, 200x150, 180x180 and 200x200 centimeters, the golden mean is usually chosen. Dimensions 150x150 fully meet the requirements for timber, both in terms of thermal conductivity and ease of assembly. Reducing the dimensions will lead to an increase in the amount of materials, and therefore to greater labor costs, even if the volume in cubes is the same. An increase in size will mean an increase in the cost of the timber and its weight.
Let's use the timber calculator in practice
Since rarely does anyone buy (and sell) lumber individually, when tens or hundreds of units of one type or another are required, we need to determine how many cubes of wood we need to purchase. To do this, you need to know the dimensions of the house, and since they are reflected in the plan, it is enough to include them in the timber calculator. Let's say a small one is being built country cottage 6x5 meters, with a ceiling height of 3 meters. It is best to buy an appropriate wooden profile, six meters long. Knowing the height of the wall, we divide it by the cross-sectional side of the lumber we have chosen. Since we previously settled on dimensions of 150x150 centimeters, we get 3/0.15 = 20 beams, which will make up the wall of the building.
It must be said that insulation is usually laid between the crowns, which should increase the height, however, the shrinkage of the wooden profile compensates for this error in our calculation. We add a plinth crown, which gives 21 beams, and then we calculate how many similar woodworking products will be produced in the entire building. To do this, we multiply the result we obtained earlier by 4 (by the number of walls). However, it is unlikely that there will be one room in the house, so a fifth wall immediately appears, an internal one, which can also be permanent, taking into account a minimum span of 5 meters. So, we multiply by 5. As a result, it turns out that 105 beams are needed to build a house. Too much? Let's see how you can save money.
Let us remember that the premises must have windows and doors, which mean the presence of significant openings. Let's say the entrance from the street is planned in a five-meter facade, exactly in the middle, and it will be exactly a meter wide. Since the crowns here are one meter shorter than the actual length of the beam, it turns out that we need 2-meter sections to form the doorway. Then from every two beams you will get exactly three crowns on this side. If interior door between the rooms will be on the edge, four-meter profiles will be needed there, the trimmings of which can also be used to create an external opening. Thus, for every three crowns of this wall we save one beam until the lintel is laid over the entrance.
Sometimes the ends of the lumber used to construct the house, sawn in the form of tenons, in door and window openings rest against the groove of the riser, the width of which is equal to the thickness of the wall.
If the height of the door is 2.1 meters, we will have 14 crowns, that is, the remainder will be 4 six-meter wooden profiles. In the same way, you can save on windows by correctly arranging them in the overall layout of the premises, and then, quite possibly, you will no longer need 105, but some 98 beams. Use those that you can win for attic floor and fastening the rafters, since such material will not work as interfloor joists, you need a profile whose sides are in a ratio of 7:5, with the height being the first in proportion.
How to calculate a cube of timber for a house - the simplest method
We have already obtained the result necessary for further calculations, namely the number of wooden profiles that will be needed for construction. Now you need to determine how to calculate a cube of timber for a house, and how much lumber is needed. Knowing the dimensions of the woodworking industry product from which the crowns are knitted, it is not difficult to obtain its volume. In our case, this will be the formula V = h . b . l = 0.15 . 0.15 . 6 = 0.135 cubic meters, here h– beam height, b– width, and l- length. Let's find out how many units of lumber are in 1 cube as follows: 1/0.135 = 7.41 pieces. They may not sell that much, sellers don’t like to cut six-meter beams, so they can reduce it to 7, or they will have to pay extra up to 8 beams.
But, since we need a lot of materials, and we know that the number of profiles will be integer, we calculate how many cubic meters of wooden profile will have to be transported to the site. We multiply the total quantity by the volume of one, let’s say we managed to save money and actually got 98 bars, then we get 0.135 . 98 = 13.23 cubic meters. However, all these calculations can be eliminated if you use the following table.
The amount of timber in 1 cubic meter. to calculate timber for a house
[Section]x[length] of beam, | Volume 1 pc., | The amount of timber in 1 m 3, |
|---|---|---|
You can take a simpler route. To do this, we calculate the perimeter of the house, multiply it by the height of the walls and get full area the external surface of the building, with the exception of the roof. Next, we subtract the area of window and door openings if high accuracy is needed, or leave it as is if the savings are not critical. The calculation is completed by multiplying by the thickness of the timber. In our case, the short formula will look like this: V = P. H. b = 27. 3. 0.15 = 12.15 cubic meters excluding the base crown and based on the fact that 3 walls are 5 meters each. As you can see, this calculation is less accurate, since the length of all lumber is 6 meters, and we took many of them as five meters.
An online calculator of timber for building a house and other structures will allow you to quickly calculate lumber taking into account the size of the building. In accordance with the result obtained, calculations will be made for dowels, thermal insulation tape and the total cost of the material.
When developing an online calculator, a formula was used that takes into account the parameters of the timber and the dimensions of the building, including the dimensions of the pediment and their number. This allows you to more accurately calculate the material for building a structure of any complexity.
To perform the calculation, you must fill in the appropriate fields in the calculator form. First of all, data on the dimensions of the building is entered - length and width, as well as the height of the walls.
If the building has complex shape, then in the “Length of additional walls” field you must enter the total length of all walls, excluding the building itself. For example, a standard residential building has rectangular shape, but in the future a non-residential veranda, a barn and a storage room will be attached to the house. To fill in the field, it is necessary to measure the total length of all walls of additional extensions.
Preliminary calculations allow you to decide on transport and delivery of material to the site
If during calculations it is necessary to take into account the material for the gables, then you will need to enter data on the quantity, as well as the width and height parameters. When measuring the latter, the maximum values are taken.
Finally, data about the material is entered - its width and height. When filling out the corresponding fields, keep in mind that data on the parameters of the structure are entered in meters, and about the timber - in millimeters.
As a result, the online program will calculate the volume of building material needed, as well as its total weight, which will allow you to select the appropriate transport if you plan to deliver the material to the site yourself. Additionally, the calculation results indicate the number of crowns, the length of the rolled thermal insulation and the number of dowels required to fix the beam.
How to calculate without a calculator
In addition to special calculators and programs, calculation wooden beam can be done at home using simple mathematical formulas. Their knowledge will help when performing preliminary calculations of materials on site when there is no Internet access.
Glued laminated timber is made from pre-prepared lamellas
As an example, we will write down the calculation of a beam measuring 150x150 mm for the construction of a house 6x8m with a wall height of 2.5 m. The logic of the calculation is as follows:
- building perimeter: (6+8)*2=28 m;
- area of the walls of the building: 28 * 2.5 = 70 m2;
- required volume of material: 70 × 0.15 = 10.5 m3.
When performing manual calculations, it should be taken into account that 10% of the material is taken as a buffer. This is necessary in order to protect yourself from shortages of materials during the construction process. If the calculations take into account savings on window and doorways, then this material can be taken as a buffer part without a 10% surcharge.
What kind of timber is used to build a house?
For the construction of residential, non-residential and ancillary structures, two types of timber are used: profiled and glued. Profiled timber – modern material, usually made from pine, spruce or larch wood. The timber canvas is made from solid logs without the use of chemicals or adhesives.
The outer part of the profiled beam can be either flat or semicircular. The upper and lower parts are made using the tongue-and-groove system, which ensures a more accurate fit of the canvas when assembling the building frame.
Glued laminated timber is a building material made from various breeds wood, the production of which occurs by gluing wooden lamellas. Mostly slats are made of spruce or pine, a little less often - from cedar pine or larch.
Profiled timber is made from solid logs
If we compare both types of timber, the profiled one has greater strength, due to which its cost increases. In addition, profiled timber is more demanding during installation and further processing.
Glued laminated timber has a constant strength coefficient, humidity in the region of 10–20% and standardized appearance. In fact, laminated veneer lumber is more versatile, but when choosing, it is worth considering that the quality of the product depends entirely on the adhesive compositions used.
Depending on the size of the building, the following options are used for its construction:
- 100×100 mm – usually used for building small summer cottages, bathhouses and sheds;
- 150×150 mm – used for the construction of permanent one-story housing and insulated cottages;
- 200×200 mm – used in the construction of multi-storey residential buildings and country cottages.
When calculating timber for a house using an online calculator, you can also find out its total cost. To do this, just enter the price per cubic meter of the product. When making calculations, you should remember that the data obtained are approximate values with which you can already contact the developer.
If you plan to purchase the material yourself, we also recommend that you carry out the calculation on paper using the formulas above.
When implementing construction work for the construction of a residential building, a specialist must perform large number various tasks, one of which is: drawing up and calculating the estimated cost to the final finishing of the premises of a residential building. IN mandatory, calculate the required number of different building materials, which is quite difficult to do. Therefore, such knowledge - how many boards are in a cube - is very important for a specialist who is engaged in the construction of a residential building and wants to complete the work as efficiently and quickly as possible.
Buying club: existing types of boards
To calculate exactly how many board pieces are in a cube, you will need to know not only what exactly a board cube means, but it is worth understanding important point that exist various types boards and what is possible to purchase on the modern market for performing a variety of construction work. It should be noted that the cube of almost all materials, regardless of the type of material, is calculated in the same way, that is, according to one specific method. The types of boards have no influence on the calculation of the cubic capacity of this building material.
Non-grooved types of lumber are: timber, various edged boards, as well as unedged boards (they are an exception when calculating cubic capacity, because this process occurs a little differently). Tongue-and-groove types (which have special grooves for making joints) include: modern lining, blockhouse, flooring material, as well as imitation of natural timber. When you choose a tongue-and-groove type of building material to purchase, then you will need to pay attention to the fact that when making calculations, only working width boards without tenons. If we talk about a blockhouse (imitation log), then when calculating the cubic capacity, only the thickness at its highest point is taken.
How many boards are in 1 cube: performing the calculation
Any person, even from his school days, understands how cubic capacity is calculated. For this procedure, it is necessary to calculate quantities such as: length, width and height. A similar principle is used to calculate the cubic capacity of 1 board. When performing such calculations, it is recommended to convert all available values into meters. The cubic capacity of 1 board, which has a cross-section of 150x20 mm. and a length of 6 m, is calculated as follows: 0.15 multiplied by 0.02 and 6, so that the cubic capacity of this board will be 0.018 cubic meters.
Let's apply the volume formula V= L*h*b (where L is length, h is height, b is width).
L= 6.0; h= 0.02; b= 0.15.
Thus, V= 6.0*0.02*0.15 = 0.018 m3.
To determine how many boards are in one cube: divide 1 m3 by cubic capacity (the volume of one board).
1 m 3 / V = N pcs.
1 m 3 / 0.018 m 3 = 55.55 pcs.
Thus, the number of boards in one cube is 55.5 pieces.
Finding out the cost of a certain type of board when the values of its volume is known is quite easy: 0.018 multiplied by the price of 1 cubic meter. When 1 cube of a certain type of board costs, for example, 5,500 rubles, then the cost will be 99 rubles. At this moment of calculation, there is some trick of sellers and managers in construction stores, because the cubic capacity of the material is rounded to some integer values.
Such rounding can lead to such a moment that the price of 1 board (when 1 cube costs 5500) will be completely different values. In addition to all this, it should be noted that various boards for construction, which have a nominal length of 6 meters, the actual length is 6.1 - 6.2 m, which is not taken into account when selling this building material. This also applies to the purchase of a significant number of boards. This can be seen quite clearly if we use a 150x20 mm board as an example. The number of boards in a cube is 55.5 pcs. But, in a cube they count 55 pieces, which when performing the calculation will have a value of 0.99 cubic meters. In fact, it follows from this that the overpayment for 1 cubic meter of this popular building material can amount to 1% of the real price. For example, 5500 instead of 4995 rubles.
To calculate the cubic capacity for a continuous type of board, slightly different methods are used. When we are talking about buying 1 board, then measuring its thickness, as well as the total length, is carried out in the same way as when choosing edged building material. In this case, the average width is taken for calculations - between great value and small.
For example, when the width of the board at one end is 25 cm, and at the other 20, then the average value will be approximately 22 centimeters. When it is necessary to calculate the volume of a significant number of similar boards for construction, then you will need to lay them out so that the wide one does not differ from the narrow one, more than 10 cm. The main length of this material in the laid out stack should be approximately the same. After this, using a regular tape measure, an accurate measurement is made of the height of the entire existing stack of boards, and the width is measured (approximately in the very middle). The result obtained will then need to be multiplied by a special coefficient, amounting to a value from 0.07 to 0.09, directly dependent on the existing air gap.
How many boards are in 1 cube: special tables
To calculate the exact number of boards of a certain width and length in 1 cubic meter, various tables are used. Below are several such specialized tables, which indicate the cubic capacity of the common and in demand types of this material today. Calculate the volume of various boards having various sizes, for example, material for erecting a fence on your site, you have the opportunity to independently use the existing formula, which is presented above.
Table of the amount of edged boards in 1 cubic meter
| Board size | Volume of 1st board (m 3) | Number of boards in 1m 3 (pcs.) | Number of square meters in 1m2 |
|---|---|---|---|
| Twenty | |||
| Board 20x100x6000 | 0.012 m 3 | 83 pcs. | 50 m2 |
| Board 20x120x6000 | 0.0144 m 3 | 69 pcs. | 50 m2 |
| Board 20x150x6000 | 0.018 m 3 | 55 pcs. | 50 m2 |
| Board 20x180x6000 | 0.0216 m 3 | 46 pcs. | 50 m2 |
| Board 20x200x6000 | 0.024 m 3 | 41 pcs. | 50 m2 |
| Board 20x250x6000 | 0.03 m 3 | 33 pcs. | 50 m2 |
| Twenty-five | |||
| Board 25x100x6000 | 0.015 m 3 | 67 pcs. | 40 m2 |
| Board 25x120x6000 | 0.018 m 3 | 55 pcs. | 40 m2 |
| Board 25x150x6000 | 0.0225 m 3 | 44 pcs. | 40 m2 |
| Board 25x180x6000 | 0.027 m 3 | 37 pcs. | 40 m2 |
| Board 25x200x6000 | 0.03 m 3 | 33 pcs. | 40 m2 |
| Board 25x250x6000 | 0.0375 m 3 | 26 pcs. | 40 m2 |
| Thirty | |||
| Board 30x100x6000 | 0.018 m 3 | 55 pcs. | 33 m2 |
| Board 30x120x6000 | 0.0216 m 3 | 46 pcs. | 33 m2 |
| Board 30x150x6000 | 0.027 m 3 | 37 pcs. | 33 m2 |
| Board 30x180x6000 | 0.0324 m 3 | 30 pcs. | 33 m2 |
| Board 30x200x6000 | 0.036 m 3 | 27 pcs. | 33 m2 |
| Board 30x250x6000 | 0.045 m 3 | 22 pcs. | 33 m2 |
| Thirty-two | |||
| Board 32x100x6000 | 0.0192 m 3 | 52 pcs. | 31 m2 |
| Board 32x120x6000 | 0.023 m 3 | 43 pcs. | 31 m2 |
| Board 32x150x6000 | 0.0288 m 3 | 34 pcs. | 31 m2 |
| Board 32x180x6000 | 0.0346 m 3 | 28 pcs. | 31 m2 |
| Board 32x200x6000 | 0.0384 m 3 | 26 pcs. | 31 m2 |
| Board 32x250x6000 | 0.048 m 3 | 20 pcs. | 31 m2 |
| Sorokovka | |||
| Board 40x100x6000 | 0.024 m 3 | 41 pcs. | 25 m2 |
| Board 40x120x6000 | 0.0288 m 3 | 34 pcs. | 25 m2 |
| Board 40x150x6000 | 0.036 m 3 | 27 pcs. | 25 m2 |
| Board 40x180x6000 | 0.0432 m 3 | 23 pcs. | 25 m2 |
| Board 40x200x6000 | 0.048 m 3 | 20 pcs. | 25 m2 |
| Board 40x250x6000 | 0.06 m 3 | 16 pcs. | 25 m2 |
| Fifty | |||
| Board 50x100x6000 | 0.03 m 3 | 33 pcs. | 20 m2 |
| Board 50x120x6000 | 0.036 m 3 | 27 pcs. | 20 m2 |
| Board 50x150x6000 | 0.045 m 3 | 22 pcs. | 20 m2 |
| Board 50x180x6000 | 0.054 m 3 | 18 pcs. | 20 m2 |
| Board 50x200x6000 | 0.06 m 3 | 16 pcs. | 20 m2 |
| Board 50x250x6000 | 0.075 m 3 | 13 pcs. | 20 m2 |
Table of the amount of timber in 1 cubic meter
| Beam size | Volume of 1st piece (m³) | Quantity of timber in 1m³ (pcs.) |
|---|---|---|
| 100×100×6000 | 0.06 m 3 | 16 pcs. |
| 100×150×6000 | 0.09 m 3 | 11 pcs. |
| 150×150×6000 | 0.135 m 3 | 7 pcs. |
| 100×180×6000 | 0.108 m 3 | 9 pcs. |
| 150×180×6000 | 0.162 m 3 | 6 pcs. |
| 180×180×6000 | 0.1944 m 3 | 5 pcs. |
| 100×200×6000 | 0.12 m 3 | 8 pcs. |
| 150×200×6000 | 0.18 m 3 | 5.5 pcs. |
| 180×200×6000 | 0.216 m 3 | 4.5 pcs. |
| 200×200×6000 | 0.24 m 3 | 4 pcs. |
| 250×200×6000 | 0.3 m 3 | 3 pcs. |
Table of the amount of unedged boards in 1 cubic meter
Please indicate dimensions in millimeters
W- board width
H- board thickness
L- board length
Initial data
N- quantity in pieces
E- quantity in cubic meters
Many people, when building a house or bathhouse, are faced with the need to calculate how much lumber is needed for the job. It’s easy to determine how many boards or timber you need. But the price of lumber is usually indicated per cubic meter, and in this case it will be more convenient to use for calculations special program. Using our website, knowing the length, width and thickness of the board, as well as their number in pieces, you can calculate how many cubic meters of lumber you will need and how much one cubic meter or one board will cost.
Scope of application
Lumber is so called because it is obtained by sawing the trunk of a tree. Lumber is used for construction, making furniture, various containers and other products. Today this type of building materials is the most popular. The wood from which lumber is made is an excellent heat-insulating material that supports stable humidity and does not require special treatment or care, which makes it especially convenient.Types of lumber
Lumber includes timber, edged boards, unedged boards, and construction slats. A beam is a log processed on all sides. In cut it has a square or rectangular section. Timber is most widely used in the construction of houses, bathhouses and floor structures.Edged board is a universal lumber that is actively used both in construction work on the outside of the building and in the design of the interior space. The cross-section of an edged board is an elongated rectangle. An unedged board differs from an edged board in that its edges are not cut off, so that the layer of bark of the tree from which the board was cut remains visible. A construction lath or beam is a beam with a smaller cross-section than a regular one and is widely used in construction.
Lumber varies according to the type of wood it is made from. They are made from coniferous species trees such as pine, spruce and larch. And from hard rocks wood such as oak and beech, birch, aspen.
Lumber is also classified by moisture content. They are divided into raw with a moisture level of more than 22 percent and dry with a moisture level below 22 percent. The former are used for construction work, and the latter for the manufacture of furniture.
There are also several types of lumber. The choice of variety depends on the scope of application. Thus, the highest quality materials are used for furniture. For carpentry and moldings, grade 1 lumber is suitable, while grades 2 and 3 are used exclusively as construction boards. Lumber, if it is not used for a long time, must be protected from moisture. This may lead to their damage. It is not recommended to store lumber stacked on top of each other. There must be spacers between the layers of beams or boards.
The table of ready-made values allows both beginners and for experienced builders. Diversity wood materials so great that both procurers, sellers and buyers needed to develop universal method calculation, which is based on a convenient mathematical parameter “cubic meter”. With the formula for the volume of a cube school course Everyone is familiar: v=a³, where a is the length of each side of the cube. In the case when we are talking about timber, the dimensions taken into account are its thickness, width and length.
Example 1: piece counting
For example, how to calculate the number of bars measuring 50 mm x 50 mm x 6000 mm in one cubic meter? Initially, you need to calculate how much volume 1 beam occupies. Let's multiply its parameters among themselves. To make it easier to calculate, let's convert the dimensions into meters: 0.05 x 0.05 x 6 = 0.015 m³. It remains to divide 1 cubic meter by 0.015. We get 66.6 pieces. This is exactly how much of this material we will receive in terms of pieces.
As a rule, when manufacturing timber, they are guided by established standards, therefore, to measure the amount of timber, they often use tables in which these standards are calculated and indicated in finished form. Thus, even a novice master can easily find out the number of pieces of timber in a cube. These tables are simple and clear, consisting of only a few columns. Ready calculations simplify the task for the buyer.
Examples 2 and 3: required volume and dimensions of cargo
If, for example, a project for the construction of a floor requires 6 pieces of timber 200 mm X 200 mm, 7 meters long, then you can easily, even with a quick glance at the ready-made values from the table, indicate to the seller the exact volume that you need. In this case, you need the required amount of this material - 6 pcs. - multiply by the volume of one beam - 0.28 m³, we get 1.68 m³, the same volume of lumber of the required dimensions in the required quantity. And vice versa, if the project indicates the total volume of lumber of certain sizes, you can easily determine the amount of timber that you will have to transport, which means you will accurately select vehicle for delivery, specifying the required total dimensions of the material.
For example, the task is to purchase 3.5 cubic meters of lumber with dimensions of 150 mm X 150 mm X 6000 mm. Using a table and simple calculations we can determine that there are 25.9 pieces to be transported by car (3.5 X 7.4 = 25.9). This information will allow the driver to calculate the number of trips, choosing the right car based on the now known dimensions: height and width of the cargo being transported. Using the table data is great for organizing lumber storage space. After all, before they settle into their permanent place services, they need to be processed and dried, which takes quite a long time. Of course, knowing the area and volume, it is easy to prepare the space needed for this.
Conclusion
Practice shows that many novice builders have difficulty navigating the piles of sawmills, especially when it comes to calculating the volume, number and size of lumber, as well as their delivery. And often already on the first cubic meter they lose their money. Having such a cheat sheet at hand, you can easily check the amount of costs for the purchased product, saving yourself from extra expenses, and also provide for a method of transporting cargo.
An important advantage this method calculations also include accurate accounting and distribution of own funds for construction or repairs, since before drawing up an estimate for work and building materials, you will certainly need to find out their cost based on cubic capacity.
Thus, determining the amount of timber in 1 m³ using a table of ready-made values is effective and useful for those who work with these materials.
More articles on this topic: 
