When making a scrupulous calculation of timber for a house, use an online calculator to check the exact volume of purchased wood.
Then you won’t have to overpay for the delivery of lumber purchased for the construction of houses, bathhouses, dachas and others capital buildings.
Purpose of the calculator, its advantages
It is difficult to calculate the exact amount of timber on your own, to reach the total volume of all necessary items. They take into account not only the width and height of the beam, knowing the total length, the height of all walls, but also the density of the wood.
Then, reaching the quantity and volume required timber, knowing the price for 1 m 3 of purchased lumber, you can automatically immediately calculate and total costs on wood for a specific house or bathhouse.
It is important to know: Initially, decide correctly on the building material. The timber can be not only profiled, but glued.
It is easier to see the exact data on the lumber used in the construction estimate, where the dimensions and the original name of the materials are indicated. Marking, cross-section of workpieces.
How to use
Accurate calculation of the required lumber using online calculator but you can only do it if you know everything technological features buildings being erected and the cross-section of timber.
The calculator already contains an automatic calculation algorithm. Therefore, by entering the requested data, you can immediately access the quantity and total volume of wood processed on all sides.
Note: knowing the parameters of the cross-section of lumber, the length is taken within the standards - 4.5 m; 5 m or 6 m (depending on the round timber).
Types of timber, application
For the construction of houses, timber is mainly made from softwood (pine, spruce). Construction material It can be with a straight front side or have a D-shaped appearance, which will allow simulating construction from a rounded log.
If you can get by with building a bathhouse square section 100x100 mm, then for capital buildings during construction one-story houses, dachas buy timber with a cross-section of 150x150 mm, and for two-story cottages and taller buildings you will have to purchase lumber with a cross-section of 200x200 mm or more.
Careful sanding is carried out on the side that will face the residential part of the house. Then you won’t have to deal with additional finishing of wooden walls.
Calculation of cubic capacity
To make it clearer, let’s look at an example of calculating the cubic capacity of a beam for one-story cottage with dimensions 8x6x3 m. The building also has 1 internal partition of 6 m.
First you need to calculate the perimeter: (LxS)x2+S1=(8+6)x2+6=34 m. Total area buildings are calculated using the formula: 34x3 = 102 m 2. Where is 34 the perimeter of the walls, 3 their height. Multiplying the result by the beam side parameter, we get the total volume: 102 * 0.15 = 15.3 m 3.
When making calculations, it is important to take into account the openings in the walls - this will allow you to save a lot and avoid purchasing excess building material. Recommended for accurate calculations use project drawings, diagrams.
Which timber is better to use
It is worth purchasing affordable lumber presented coniferous species quality wood that have been processed and dried naturally.
Profiled timber is purchased standard sizes with a cross section: 100x100 mm, 150x150m, 200x200 mm and a length from 4 m to 6 m or more. The laminated laminated timber used in construction, called lamellas, is pre-sawn into boards. This material is subjected to planing and special drying, and the resulting wood moisture content is within 8–9%.
After sorting, the dried boards are glued together hydraulic press, forming laminated veneer lumber. In the technical process, water-resistant special glue composition is used. The most durable among the two types of lumber under consideration is laminated veneer lumber, which is recommended for capital construction.
Calculation of material for floor and ceiling
Rafters, beams used in arranging the ceiling and floor are quite suitable with a section of 100x150 mm. Knowing the exact dimensions of the future building, it is easy to calculate the lumber for the ceiling and floor.
If the installation step = 1 m, 7 beams, each 6 m long, can serve as lags, including 7 beams with the same length, which will be prepared for arranging the ceiling. In total, 14 beams or 84 linear meters. When calculating the required amount of lumber, the resulting length is multiplied by S section. , and we get 84*0.015=1.26 m3.
It is also necessary to take into account the possible percentage of substandard quality, which, on average, can be up to 5% of the total purchased timber.
Calculation for roofing
When counting required quantity timber for roofing, it is necessary to clarify the type of roof in advance. If it is a gable roof type, you need to find optimal angle tilt for mounted structural elements.
As a rule, the roof will have 45% at the ridge. The installation spacing of the rafters was chosen to be 0.6 m. This type of fastening elements is made on the basis of timber with a section of 100x150 mm. The leg length of the rafter beam is calculated using the Pythagorean theorem. The hypotenuse of the resulting triangle is the width of the house, and the rafters are the legs.
The length of the legs is 4.2 m. The length of the house is divided by the step and 12 beams are obtained. Knowing the cross-section, we calculate for the roof - you will need 1.51 m 3. It’s worth adding about another 7–8% to account for technical needs and possible poor condition.
Keep in mind: When installing a roof with a smaller distance between the rafters, it is permissible to use a smaller section of timber.
To avoid tedious calculations, use a popular online calculator. The free service will protect you from inaccuracies, allow you to insure yourself against inevitable miscalculations, and prevent mistakes.
Construction own home associated with solving many issues and problems. One of the key questions is how much will your future home cost? It is impossible to calculate without accurate analysis required material. It’s one thing if you decide to order construction finished house Full construction. The company will take care of the calculations. It’s another matter if it’s decided to build housing on our own. How to calculate the foundation? How much does it cost to build walls and roofs? How to provide your home with communications? Let's consider just one of the important components of the upcoming expenses - the calculation of timber for a house. There are many calculators on the Internet for online calculations of the amount of timber. But since we decided to build a house with our own hands, we need to figure it out important issue.
Before you start calculating the timber for your house, you need to make several important decisions:
- determine the purpose of the future home,
- choose the material from which the house will be made,
- select a material supplier.
Let's look at each of the points. We did not mention the size of the house and its number of floors. To calculate materials, you must have a project with the exact dimensions of your object. You can make preliminary calculations so as not to make a mistake in choosing the size of the building that will be affordable for you.
Why is it important to know the purpose of your future home? The thickness of the walls you will lay will depend on this. For a spring-summer stay in a country house, a wall with a thickness of 90-100 mm is suitable, but for permanent residence a wall thickness of at least 150 mm will be required. Choice in favor of more thin wall will result in costs for insulation or heating of the house. Of course, you should also not forget about the dimensions of the building; the choice of beam cross-section will also depend on this.
The choice of material is simple. The calculation of walls made of edged, profiled or laminated timber has a number of features. The edged timber has the height and width that will actually be used for the wall. The profiled beam has a general size (it is according to these dimensions that you will have to pay the cubic mass to the supplier) and a working size (which is actually used to build the wall). The working size differs from the general tenon size, which can range from 5 to 20 mm. It might seem like a small amount, but when calculated for the whole house it amounts to a significant amount.
The choice of supplier before making calculations is due to the fact that there is no strict standard for the production of profiled or laminated timber. May vary dimensions material, tenon size. Probably everyone is also concerned about not only calculating the volume of timber per house, but also calculating total cost material. Don't rush into choosing the cheapest option. Low price usually a consequence of poor quality. But even a high price is not a guarantee of quality. It is better to choose a supplier with extensive manufacturing experience and recommendations from buyers or developers in your region.
If you do not take into account the dimensions of the house, then you need to start the calculation by choosing the dimensions of the beam, which can affect the project as a whole: a thin beam will not allow the construction of complex projects, and a more massive one will require a recalculation of the weight of the building and its load on the foundation. You may need to recalculate the quantity screw piles or tape depth.
Calculation for a house made of edged timber
Houses made from ordinary sawn timber are different simple projects, and calculating the amount of timber for such a house is a simple task.
First of all, it is necessary to calculate the number of rows of timber required to achieve the design height of the walls. To do this we use the formula:
Expert opinion
Sergey Yurievich
Ask a question to an expertNumber of rows = height of walls/height of 1 beam
The use of inter-crown seals will lead to a slight excess of the design height of the frame, but shrinkage will bring everything to the designated parameters.
Next, the total perimeter of the walls and partitions, which will also be made of timber, is calculated. Often thinner timber is used for partitions. For example, for walls a material with a cross-section of 150x150 mm is used, and for partitions - 100x150 mm. The height of the beam is always constant, so the number of rows for load-bearing walls and the partitions will be the same. In this case, we calculate the total length of the load-bearing walls and separately calculate the length of the partitions. Now it remains to calculate the volume of the timber:
Expert opinion
Sergey Yurievich
Construction of houses, extensions, terraces and verandas.
Ask a question to an expertVolume of beam = number of rows * length of walls * (height of beam * width of beam)
We separately calculate the volume for partitions and walls. Now all that remains is to sum up these volumes and multiply the result by the cost of one cubic meter. Now we know the cost and volume of a timber wall kit for our house.
Calculation of a house made of glued or profiled timber
Almost every manufacturer will offer you a free calculation of the volume of timber for your home. But what if you decide to compare two manufacturers who produce material of different dimensions, then it is better to do the calculation yourself, since the volume calculation made by the manufacturer may be subject to bargaining. When self-calculation you will already be able to operate with final numbers. Of course, they will be approximate, without deduction of window and doorways. And in the case of purchasing profiled timber by molding (without bowls and design), which is the cheapest material, there is no way to do without calculating the volume.
As in the case of edged timber, we calculate the number of rows for a given wall height:
Expert opinion
Sergey Yurievich
Construction of houses, extensions, terraces and verandas.
Ask a question to an expertThere is a lot of talk about the fact that they have a lot of advantages. Characteristics The material under consideration is the correctness of form and usefulness for the general living space. That is why the most important component for a correctly built house is a normalized calculation of the amount of material required. You can calculate the amount of timber per house yourself, without consulting specialists.
Of course, you should not avoid the advice of professionals, as they will be able to establish indicators in a short time and with incredible accuracy. To make the calculations correctly, you need to determine the required volumes and find out how many components you need to take per square meter.
Thanks to the final results obtained, you can easily navigate the price range and future expenses.
Calculation of the quantity of materials
To make the calculation process more convenient, you need to use some list of simple tools:
- Regular pencil;
- A piece of paper;
- Calculator;
- Roulette.
It is important to know that the indicators given in this article are approximate. Therefore, for specific construction it is worth using your own data.
The most accurate pictures are compiled during the planning period and the availability of a final design for the future structure.
- Measuring the entire perimeter of the future building;
- Multiplying the perimeter by the floor height of the house;
- Multiplying the purchased numbers by the thickness of the material used;
- The resulting total number of cubes is the indicator necessary for the construction.
If, in addition to the walls, construction is planned internal partitions, it is necessary to take this factor into account when calculating. If necessary, obtain indicators not in cubic meters, they can be easily converted into units.
The specific moment is determined by dividing the total volume by the volume of a unit of production.
Counting example
Suppose you need to install a one-story structure with dimensions of five by seven cubic meters. In addition to this, you need to install a partition together with. The total ceiling height is equal to three meters. As for the pediment, it also consists of direct timber.
When performing the activity, a tree with a cross-section of 150 * 150 millimeters is used. In this case, the calculations will be as follows:
- 33 meters/(5+7)*2+5 – this is the immediate perimeter together with partitions;
- 33*3*0.15 = 15 square meters - these are the total volumes of the wall surfaces of the first floor;
- 5*3*0,15=2,25 square meters– pediment volumes.
Having received all the above indicators, it is necessary to summarize. In the case under consideration, it is shown that 17.25 square meters of material are required for wall surfaces.
This is all considering window openings, doorways, beams and, of course, floors. It is important to remember that components should be purchased with a small margin.
To summarize, the total cubic footage is equal to 25 square meters.
Dimensions of required materials
Quite significant parameters are thermal conductivity properties and, naturally, thickness. When producing a summer house or cottage necessary for regular living there, it is better to use materials of different thicknesses.
In case of summer country house width and thickness, in principle, have no special significance. Here it is possible to use materials with a cross-section of 100 * 100 millimeters. In the case of a cottage, you should pay attention to beams with a section width of more than 150 millimeters. Of course, additional thermal insulation wall openings.
The specific number of elements required for the construction process depends on the thickness parameters. If you want to save on the purchased material, you need to remember about the not entirely high-quality thermal effect obtained in the future.
To build an insulated building, you need to use timber with a thickness of approximately fifty centimeters.
A similar result can be obtained when using sections of 150 * 150 millimeters, as well as insulation of ten or fifteen centimeters.
When the idea of building a house approaches the stage of practical action, there is always a need to calculate the required amount of material. Accurate calculations carried out according to the project specific house(Cm. ).
- Calculation of the perimeter of the house by adding the lengths of the external walls.
- Getting the area external walls one floor, multiplying the perimeter with the height of the walls.
- Calculation of the number of cubes by multiplying the area with the width of the beam.
This results in the required volume of material for one floor. When it is planned to install internal additional partitions made of timber in a house, then they must also be taken into account. Knowing the total volume of material in 1m³, you can calculate it in pieces.
And so the formula for calculating the volume of timber in cubic meters:
- p – length of the walls of the house (meters).
- h – wall height (meters).
- l – timber thickness (meters).
Using the example of a house (dimensions 6x9m, 6 meters additional internal wall, height 3m, timber 0.150x0.150m), the calculation of the required material looks like this:
- p=9+9+6+6+6=36m.
- h=3 meters.
- l=0.150 meters.
After multiplication, the volume of the required timber is obtained:
V=36 m*3 m*0.150m=16.2m³.
Calculating the volume of building materials becomes a little more complicated if the construction of a house made of timber requires material of different lengths and cross-sections. Then, first, the volume of the timber of each section is calculated separately, and the values are added up.
The most popular material has a length of 6 m, but the walls in the example are longer, then they plan a main wall, which is made load-bearing.
The size of the timber, of course, plays a role, but it is important to evaluate economic feasibility and take into account the thermal conductivity parameters of the material.
The width of the timber becomes relevant when the house is planned for year-round living, but any house can be insulated high-quality thermal insulation. When you plan to build a simple country house, then you can choose a material with dimensions of 0.100 × 0.100 m.
You can calculate the volume of one beam by multiplying its width, thickness and length. Then the volume of a six-meter beam is 0.150 × 0.150 m. has a volume of 0.135 m³. After calculating the total volume and quantity of timber in 1 cube, you can estimate the approximate cost of the material.
The most accurate calculation of the volume of a beam is carried out if the area of windows and doors is subtracted from the area of the walls, and the resulting value is multiplied by the known thickness of the beam.
You need to know that when a house is built from profiled timber, then 10mm. the crown “fits” into the profile and a larger volume of material is required than calculated using the above methods.
Not included in simple formulas and the length of the outlets formed when cutting into the bowl, they also increase the overall cubic capacity.
By making calculations, you can also determine how many pieces of timber are needed per house by dividing the total amount of material (cubic meters) by the volume of one product.
Before purchasing any building material, it is necessary to determine the required quantity as accurately as possible, otherwise you may lose some amount due to remaining surpluses or the need for additional purchases, as well as the unaccounted for possibility of deception on the part of unscrupulous sellers. Beams, logs, boards and similar products made of wood, as you know, is sold in cubic meters, which means you need to know all the details of the calculations for determining the volume of these materials, as well as converting the required number of pieces into cubes and back. And in the case of purchasing timber for building a house, when calculating the required amount of this building material, it is also necessary to take into account the design and features of the future building.
Basic calculations - determining volume and converting from pieces to cubes and back
It is very simple to calculate the cubic capacity of timber, boards and similar lumber. To do this, you need to know the thickness, width (height) and length of the product. And, as you know from a school textbook on geometry, you need to multiply these dimensions:
V = T ∙ H ∙ L, where
V – volume of timber, m3;
T – thickness;
H – width;
L – length.
Dimensions before calculation should be given in one unit of measurement: mm, cm or m. It is better in meters, so as not to have to convert from mm 3 or cm 3 to m 3 later.
Timber size table
For example, let’s calculate the cubic capacity of a beam of 150x200. These dimensions, as you know, are indicated in mm. That is, the thickness of the product is 0.15 m and the width is 0.2 m. The standard length of timber and boards is 6 m (sometimes also indicated in mm - 6000). Or maybe another. But for example, let’s take exactly 6 m. Then the volume of this lumber is:
0.15 ∙ 0.2 ∙ 6 = 0.18 m 3.
Now you can convert the required quantity (in pieces) of this product into cubes. Let's say 49 pieces are required:
0.18 ∙ 49 = 8.82 m3.
Knowing the volume of one product, you can also calculate the cube of timber, that is, determine how many units (pieces) there are in 1 m3. To do this, you need to divide 1 cube by the cubic capacity of one product, already calculated or taken from reference tables (in the example under consideration - 0.18 m3):
1 / 0.18 = 5.55555... pcs.
The amount of this type of timber is calculated in the same way for any volume.
Nuances of calculations - how not to make mistakes and not be deceived
As follows from the above methods and calculation examples, it is very easy to calculate the required volume of timber in pieces or cubic meters. However, one must always remember that 1 cubic meter does not contain a whole number of these products. For the example given with dimensions 150x200, length 6 m - 5.55555... pcs. Unscrupulous, most often timber retailers, cleverly take advantage of this.
For example, you need 1 cube of this material from the example. The seller, of course, sells 5 products, but charges the amount for a whole cubic meter. The overpayment will be the cost of half a beam.
Let’s say that to build a house you need the same 49 beams from the example. And if the seller calculates according to the following scheme, then he will have to significantly overpay for the timber received:
- 1 cube – 5 products 150x200, 6 m long;
- 49/5 = 9.8 cubic meters payable.
This is a scam pure water for 5 units of timber. They are superfluous and unnecessary, but will be paid for but not received. In the calculation examples above, the data of 49 products has already been converted into cubes - this is 8.82 m 3. That is, a “particularly enterprising” seller will deceive an inattentive buyer by:
9.8 – 8.82 = 0.98 m 3 timber,
which is 0.98/0.18 = 5.44444... pcs. of this lumber (0.18 – the volume of one product calculated above).
Therefore, the most correct thing would be to calculate in advance exactly the number of units (pieces) of material, and only then, using this data and the dimensions of the timber or board, calculate their actual cubic capacity.
That is, in the case of purchasing one cubic meter in the example above, you must first decide how many beams you really need to take - 5 or 6. And then we calculate their cubic capacity:
0.15 ∙ 0.2 ∙ 6 ∙ 5 (or 6 pcs.) = 0.9 (or 1.08) m 3.
And for 49 units of this timber:
0.15 ∙ 0.2 ∙ 6 ∙ 49 = 8.82 m 3.
Then you will have to pay exactly for these 0.9 (1.08) or 8.82 cubes, receiving exactly 5 (6) or 49 products. Moreover, both the quantity in pieces and the volume in m3 must be indicated in the invoice for the timber sold by the seller.
Other features of calculating lumber cubic capacity
Another one important feature, which you should know for correct calculation cubic capacity of timber or boards when purchasing them. The actual length of lumber is usually always slightly longer than the standard or declared by the manufacturer of this product. So, instead of 6 m, the average length of the timber in question is, as a rule, 6.05 m. This is due to the fact that the ends of the lumber are not processed after cutting, which is why they may turn out to be uneven, go at angles, and be different, or simply be dirty. Of course, you don’t have to pay for these 5 cm. But some cunning sellers, although quite rarely, still try to take even this into account when calculating cubic meters, which is pure deception.
And regarding calculations for tongue and groove and profiled timber. The presence of tenons, grooves, and other protruding or chiseled places should not be confusing. Calculating the cubic capacity of such materials is no different from determining the volume of ordinary products that are even on all sides. For tongue-and-groove and profiled lumber, the rule is that only the main part (working width) of the product is measured and taken into account, and all structurally necessary and/or decorative elements are not taken into account in calculations. This provision applies to absolutely all types of timber.
Purchase of large volumes of materials - calculation of folded and dense cubic meters
When to purchase a large number of timber, their cubic capacity is calculated somewhat differently than discussed above. For example, timber and boards are needed to build an impressive, spacious house, as well as various other outbuildings near it. At the same time, the necessary lumber will certainly be available different sizes V cross section and length. Measuring and calculating each type of required material for such purchase volumes is an activity that can take more than one day.
For such cases, there is a specific calculation method. It is based on two important concepts:
- 1. Dense cubic meter of wood. This is the name given to a volume occupied only by wood and without voids or gaps in it. It is determined by measuring individual timber pieces individually, and then subsequently calculating their total cubic capacity.
- 2. Folded cubic meter. This is the name given to the volume occupied by lumber stacked as densely as possible and having voids, as well as gaps between individual wood products. It is determined by measuring the stack and then multiplying the dimensions of the latter. Moreover, in such a package the main amount of material should have approximately the same length, and the remaining products can be shorter, but not longer. It is allowed to have short lumber in the stacks, which should be stacked tightly one after another.
In order to quickly calculate the large volume of required purchased lumber, which has already been prepared and stored in the form of a stack, the latter is first measured and then its cubic capacity is calculated. This will calculate the fold cubic capacity. Then its value must be multiplied by a special conversion factor. The result will be a volume of only wood (a dense cubic meter), that is, exactly those materials that are purchased and will be paid for.
The value of the conversion factor is regulated by a number of standards for lumber: GOST 6782.2-75, 6782.1-75, 6564-84, OST 13-24-86 and others. For timber and boards, depending on their moisture content and the type of wood from which they are made, the value is in the range of 0.74–0.82.
We calculate the required cubic capacity of timber for building a house
- The height of the external walls, measured from the foundation level. Let's denote it as H.
- The height of the internal partition walls, if they exist and should be made of timber.
- The length of the outer and interior walls.
- Number and length of beams used in rafter system, as floor beams and, as well as in its other structures - if provided for by the project.
Then we select the thickness of the material for each of the above structural elements. For external and internal load-bearing walls, depending on the purpose of the house being built and the region where it is being built. For non-load-bearing partitions - at your own discretion. The base (lowest) crown of external walls is usually slightly thicker than the rest of the timber for them. For other structural elements, the thickness of the material is selected based on its operating conditions, as well as the required strength of the structures in which it is used. In a well-drafted project, by the way, the thickness of the timber used for the walls, plinth crown, and other structures of the building should already be indicated.
Now all that remains is pure arithmetic. First, we calculate the perimeter of the house - add up the length of all its external wall structures. For a simple rectangular or square structure, you just need to add its width and length, and multiply the resulting value by 2. Then we calculate the cubic capacity of the base crown:
V C = T C ∙ Z C ∙ I, where
V C – total cubic capacity of basement lumber, m 3;
T Ts – thickness of the base product, m;
Z T – its width (height), m;
I – perimeter of external walls, m.
We calculate the remaining height of the external walls, m:
h = H – Z Ts, where
H – total height, m.
We calculate the area of external wall structures without a plinth, m2:
If the thickness of the material of the base crown is the same as that of the entire wall, then the area of the latter, m 2:
We calculate the area of the internal walls, the thickness of the lumber of which is the same as that of the external ones, m2:
S B1 = H B ∙ L B1, where
H В – height of internal walls, m;
L B1 – total (total) length of internal walls, the material thickness of which is the same as the external ones, m.
We calculate the area of the internal walls, the thickness of which is different, m2:
S B2 = H B ∙ L B2, where
L B2 - total length of internal walls, the thickness of the material is different, m.
We calculate the cubic capacity of the main lumber - for external walls and internal partitions made of the same timber, m 3:
V S = (S H + S B1) ∙ Z S, where
Z S – selected product thickness, m.
We determine the volume of material for internal partitions from other timber, m3:
V B = S B2 ∙ Z V, where
Z B is the selected material thickness for these partitions, m.
We divide the results obtained (V C, V S and V B) by the length of the purchased lumber and its selected width (height). You will get the amount of material in pieces. We round this value to a whole value, and then recalculate V C, V S and V B, as described in the second chapter.
To save on lumber, you should calculate the total areas of window, door and other openings for the corresponding walls. Then their values must be subtracted from S H, S B1 and S B2, respectively. After this, we calculate V S and V B using the same formulas. Then we increase the obtained values by 10–20% - so that there is a reserve just in case.
The cubic capacity of the timber for the remaining elements of the house in which it is used is calculated even easier. Its total length is calculated and multiplied by the thickness and width selected for the material.