Calculation of the volume of lumber. How many boards are in a cube: how to make calculations using various methods Table for measuring the cubature of boards

Before starting construction, it is necessary to determine the required amount of material. This parameter will be needed for the purchase of raw materials and products, in most cases it is also involved in engineering calculations. In the article, we will analyze how many boards are in a cube.

Types of lumber

To date, wooden products for construction are presented in a variety of variations: components for the construction of walls and individual structures (beams, logs), various panels (fiberboard, chipboard, OSB), elements for finishing and cladding. Therefore, it is worth starting with what boards can be:

How many boards in a cube of any kind are determined in the same way, regardless of the type of wood and the degree of processing. Exceptions are unedged boards. Next, consider the calculation methods.

The concept of volume

Everyone from school knows that 1 m 3 \u003d 1m x 1m x 1m (length * width * height in meters).

Since the elements of a batch or type have the same dimensions, how many pieces of boards in a cube can be determined, knowing the volume of just one. At the same time, it is not necessary to represent a physical figure with sides of 1 meter, the actual volume of the product is hidden under the concept. It is used in the sale and purchase, calculation of the total volume of construction and constructive calculations.

We determine the quantity

Everyone knows that boards 1 meter long are used extremely rarely, their main working length is 3, 4 or 6 m. It should be borne in mind that lumber is made in production with a margin of length up to 10-25 cm. In some cases, the seller neglects this size, but in most cases, it is taken into account in the calculations. Therefore, pay attention to this so that there are no questions about overpayment. Height and width are indicated exactly in millimeters. The final dimensions look like this: 25x200x6000 (height * width * length in mm). To convert the value into meters, it is necessary to divide the values ​​​​by 1000, we get: 0.025 * 0.200 * 6.0 (m). We multiply the values ​​\u200b\u200bwith each other, we get: 0.025 * 0.200 * 6.0 \u003d 0.03 m 3.

Since all boards have the same appearance and parameters, we determine how many boards are in the cube: 1:0.03=33.33 pieces. We round up to whole units, we get 33 products. Here you can also calculate the cost of 1 board: if 1 cube costs 6500 rubles, then an element with a volume of 0.03 m 3 will cost only 195 rubles. Armed with this knowledge, you can send to the store.

Unedged materials

Boards and beams of this type have raw side faces, since these are the first layers taken from the tree trunk. Thus, the width parameter cannot be uniquely determined. How, then, to calculate how many boards are in a cube?

Take for example a sample that has a different width at both ends: 20 cm on one side and 30 on the other. In such a situation, the average value of the indicators is taken, in our case - 25 cm. Further, the volume of such a board is determined by the already known formula.

When there is a need to purchase a large number of elements, they are stacked in piles so that all sizes match as much as possible (the difference is no more than 10 cm). Further, by simple measurements, determine the length, height of the stack, the width of the middle part, multiply them by a coefficient that takes into account the air gap: 0.07 ... 0.09 (more gap - less coefficient). Thus, they find out how many boards are in 1 cube of unedged lumber.

The main dimensions of such boards are: 25, 40, 50 mm in height and 6000 mm in length. Other parameters are rarely set, mostly by personal order. This is due to the low demand for products and the specifics of their application. These are purchased for the construction of scaffolding, roof lathing, various decking, and also for firewood. Long boards are suitable for these purposes, which can be cut as needed.

Pay attention to the little things

In order to buy wooden products and not overpay an unscrupulous seller, use the above formulas and independently calculate the required number of boards. A simple example: you got the actual volume of 1 element 0.035 m 3 . Suppose 1 cube costs 6000 rubles, then the board will cost 210 rubles. But if the seller rounds thousandths to hundredths, 0.04 m 3 will come out, then you will have to pay 240 rubles for the product. Maybe for one board the difference is not so significant, but often lumber is bought in large quantities, then the difference in price can cost several hundred rubles. How many boards in a cube - it is desirable to know for sure.

Making the calculations easier

In order not to determine the volume of products individually each time, you can use ready-made data. Manufacturers have calculated how many boards are in a cube: a table compiled from the measurement results helps determine the required amount of material. Such directories contain data on different types of products, they are combined into groups according to the main sizes. There are separate reports for boards, beams, platbands, skirting boards and others that exist today, they are actively used not only by the townsfolk, but by design engineers and builders.

Now consider how many boards are in 1 cube. The table is compiled for edged products.

As you can see, the reference book contains the exact number of boards in a cube. The table takes into account fractions up to thousandths, which are important to take into account when buying and other calculations.

non-standard

For construction and household purposes, neatly processed products are not always used. Sometimes it is advisable to purchase unedged material, the volume of which is not easy to calculate due to the specific uneven structure of the product. For these cases, there is also a solution - ready-made reference summaries, from which you can find out how many boards are in 1 cube. The table for them is compiled according to the main average sizes.

The tabular data are for reference only and may differ slightly from the actual ones: as already mentioned, products may differ in size by a couple of centimeters in length, for example. Therefore, each time you should pay attention to specific parameters.

It does not matter what lumber is needed for construction. You must be able to independently determine the required volume using formulas, calculators and tables. This will help to avoid the purchase of an extra number of boards and significantly save the budget.

It would seem, why do you need to know how many boards are in one cubic meter? After all, with a large construction, boards are sold anyway in “m 3” and payment is made precisely for the volume, and if only a few pieces are needed, then the cost is determined by linear meters. And yet, it is necessary to understand how such a calculation of the material is made.

With the proper organization of work, the first stage is always such an item as planning. And not only the design and features of the future structure, but also material costs. Therefore, if, in accordance with the project, 40 boards are required, then, given the marriage or inaccuracy, you will have to buy - with a margin - 45 pieces. For this, you should calculate how many “cubes” you need to purchase and add a few more blanks to them.

Why?

Firstly, the number of boards in 1 m 3 depends on their parameters (thickness, length, width). Naturally, for each size their number in the "cube" will be different.

Secondly, when carrying out any work, whether it is a new building or renovation, different boards are always used. For the rafter system - one, for the floors - others.

Thirdly, buying extra material is a waste of money. Of course, the boards will come in handy later, but they need to be stored somewhere. And not just to leave on the site, and then get "rotten", but to provide the proper conditions. And given that we have never had a shortage of wood, is it worth buying much more than necessary?

Fourth, time factor. And if there are not enough boards when purchasing in cubic meters? What, stop work, look for trucks, waste time going to points of sale?

And fifth, you should not hope that the Seller will answer such a question. At best, he will offer to count the boards in piles himself, if interested. At worst, on purpose or out of ignorance, he will deceive.

We offer you a table with ready-made data:

It has only 3 columns. The first shows the dimensions of the blanks (in "mm"), the second - their number in 1 m3, and the third - the volume of 1 board (also in "m3"). There is nothing complicated. It is only necessary to find the corresponding line, and the answer to the question of interest has been received.

By the way, it's very convenient. If we multiply the entire required number of boards by the volume of one, it will become clear how many "cubes" will have to be purchased, which means how much money will have to be spent. This is exactly what a good owner should do. And tables are not needed, just use a calculator.

This table provides data for both edged and unedged boards. In addition, there are calculations for, which is also often used in construction or repair.

In principle, this is quite enough.

Note

All of the above is true if the edged board is purchased. But it also costs more. It is more cost-effective to take raw material if it is possible to trim it yourself. But in this case, it is necessary to apply a coefficient when calculating. Experts believe that 20-30 percent of unedged lumber will go to waste. Therefore, from 1 "cube" of finished boards, you will get less.

Any construction or repair work with wood requires a painstaking calculation of the required amount of this building material. How to correctly calculate how much to buy this material so that you don’t spend extra money and have enough for everything planned in full? Below is the formula and rules for calculating cubic meters of wood, which will help eliminate even the slightest errors!

What are lumber

What is lumber - perhaps everyone understands. This is a tree already sawn on special equipment.

The process of preparing lumber is always the same:

1. Wood (round timber, i.e. logs) is brought to the sawmill;
2. Next, this primary timber is sorted according to the directions of subsequent processing, in order to eventually obtain a building material from a tree of the required size (length) and cross-sectional area (width + thickness).

You should be aware that timber and any kind of lumber will be measured in cubic meters. According to the construction and mathematical standards, a cubic meter is a three-dimensional square, for the length, width and height of which one meter is taken.

In order to accurately determine whether there are enough wood building materials for a specific construction task, it is necessary to take into account the dimensions of the resulting edged board and the features of its primary woodworking.

Edged timber

This is the most sought-after lumber for construction or renovation, which can be of various lengths and cross-sectional sizes. If you know these sawing parameters, it is easy to find the values ​​\u200b\u200bof how many boards are in a cube.

For example, we received boards 50 x 150 x 6000 mm in the amount of 25 pcs. To calculate how many cubes it is, you can use a special table. There are only three columns, according to the testimony of which it is easy to calculate how many boards are in one cube. Since we have 25 boards, it is easy to find out what cubic footage it is: divide 25 by the value obtained (how many boards are in 1 cube in a table of 6 meters).

Planed timber

Unlike edged timber, which has natural moisture, planed timber is qualitatively dried. As a result of timber drying, its volumes and weight slightly change (decrease):

1. If you use undried wooden lumber in construction, then when they dry, the surface can change its shape (it twisted or bent the beam).
2. The quality and durability of the structure as a whole will depend on how much the building material weighs.

Another difference between planed timber and other types of lumber is a strict regularity in the initial dimensions: the length of the timber section should not exceed 2 times in relation to the width dimension.

planed bar

According to construction GOSTs, there is a certain index by which a bar is distinguished from a bar. This is the section width: if this parameter is greater than 100 mm, then we have a bar in front of us, and if the section width is less than (or equal to) 100 mm, we are dealing with a bar.

Edged bar

Edged bar (by analogy with edged timber) is freshly sawn (or without high-quality drying) lumber.

The difference between edged or planed timber / timber is practically conditional, because you can change the width of the material by 2 - 3 cm (and therefore change the status of this material) at the sawmill without any problems.

Professional builders choose timber for the intended use, considering only 3 features:

1. The type of wood from which the beam is made;
2. Drying time of this log house;
3. Features of the building structure (weight load), for the construction of which building materials are selected.

Edged board

This is a kind of lumber with certain dimensions: the width must be 2 times greater than the thickness of the section. The bearing capacity of such a building material is less than that of a bar.

Because their purpose is appropriate:

1. Interior works (floor, roof, walls);
2. External arrangement (fences, siding, construction of outbuildings, etc.).

floor board

According to the dimensions and purpose, there are various types of floorboards (or lining).

To date, the building materials market offers such types of wall paneling, which does an excellent job with sheathing any surface:

1. Parquet - the highest quality and practical properties of this type of flooring are provided by the internal structure in 3 layers: spruce, wood-fiber from conifers and decorative from fruit trees, ash, oak.
2. Terraced - consists of natural wood + some polymers. Differs in high tolerance to humidity, temperature fluctuations, light.
3. Sexual ordinary is a pure wood material. Pine lining is used for arranging floors, walls, ceiling coverings in residential premises. Lining made of aspen or linden is ideal for a bath, larch lining is used for arranging street buildings (arbors, terraces, etc.).

By quality, lumber for the floor is divided into classes:

1. The highest (or selective) is used only for elite buildings with extremely high wear resistance and reliability;
2. The first and second are applicable for the construction of ordinary housing;
3. The fourth is exclusively suitable for outbuildings.

How to measure

Calculating a sufficient amount of lumber is a responsible task. To calculate how many pieces you need to buy to complete repairs for a specific area of ​​\u200b\u200bthe floor or wall, you should know the cubic footage of these lumber.

The task is not difficult, but pedantic, and begins with calculations for one board:

1. The width, length and thickness of a lumber unit are indicated in millimeters, which should be converted to meters;
2. Multiply the obtained values ​​\u200b\u200b(width x length x thickness) - this is the cubic footage of the board / beam.

Now, in order to estimate how many such boards / bars are in a cube, you need to divide 1 m 3 into the resulting product of the external dimensions of the building material and round up to a whole value. This will be the desired result.

How many boards in a cube: timber table

In order not to waste time on measurements / calculations, you can use a ready-made table. Here, according to the known dimensions of the timber, it is easy to calculate how much timber is in 1 cube and what is the volume of one timber.

How many boards in 1 cube: board table

There is a similar table for boards: knowing in advance (or measuring it yourself) the original dimensions, it is very easy to find out the volume of a unit of a given building material and how many boards of this size are in a cube.

The formula for calculating the board in a cube in squares

To calculate the surface area, only two indicators are used: length and width. Therefore, in order to calculate the required amount of lumber for work, the cubic capacity of lumber should be converted to square, and compared with the surface area.

Make it easy: 1 m 3 divided by the thickness of the selected unit of building material.

The formula for calculating the board in a cube in pieces

To determine how many boards of a given size in 1 cubic meter, you should:

1 m 3 / board volume (i.e. length x width x thickness)

The formula for calculating the volume of the board

Volume is a three-dimensional quantity. To calculate the volume of the board, you should take the product of width, thickness and length. But, the situation is simplified if you take a meter beam or board. In this case, we multiply only the remaining two values: the thickness and the width of the section.

How many boards in a cubic meter. Memo to the developer

Meters are linear, square and cubic. Starting a large construction site or even a small repair, you should be clearly oriented in these terms. The ability to correctly convert the amount of certain materials into linear or cubic meters will serve as an excellent service in preliminary calculations of the cost of a planned repair or construction. For example, clearly understanding how many square meters are in one roll of wallpaper, you can quickly calculate their number required for pasting a room or an entire apartment.

Calculations can be done in cubic meters, square or running meters

If the upcoming repair or construction is associated with the use of wooden materials, it is necessary to thoroughly study the recalculations from linear meters to cubic meters, since prices can be presented on the market both per unit of material and per cubic meter. The number of timber in the cube varies and depends on its cross section. The easiest way to find out how many boards are in a cube is a table, but if it is not nearby, you will have to remember the formulas.

What is a cubic meter

A cubic meter (abbreviated m³) is a unit of volume and is equal to the volume of a cube with an edge length of 1 meter. In accordance with GOST 8486-86, wooden materials must have measurable cross-sectional dimensions and lengths, so that you can easily calculate the number of boards included in the cube of the material.

To determine the dimensions of the section, it is necessary to step back from the end of the beam at a distance of at least 10 cm and measure the width and height of the beam. Multiplying these values ​​​​by each other, you get the cross-sectional area of ​​\u200b\u200bthe beam, multiplying which by the length you get the volume of one beam. By calculating the number of bars in one cubic meter, you can easily navigate between the cost of one beam and one cube of beams.

A cubic meter is equal to the volume of a cube with an edge side of 1 m

Calculation of lumber for construction before buying them

Of course, the easiest way is to come to the developer to explain what you want to see in the final version and agree to the proposed project. But, if you independently understand the calculations of the required amount of lumber, then even at the stage of discussing the cost of materials and work on building a house, you can find out how real prices are offered by a construction company.

Many developers calculate the required amount of material in cubes, some consider it piece by piece, taking as standard the running length dimensions - 6 or 12 m. A clear understanding, for example, how much timber is in a cube of 150x150x6000, will protect against overpayments.

Standard timber 0.15x0.015x6 meters

The procedure for calculating the amount of timber in a cube

Despite the same principle of carrying out calculations, there are certain nuances in determining the cubic capacity and the amount of various lumber.

1. Basic formulas for calculating the number of bars in a cube

To determine how many boards in a cube, with bars of a certain section, you need to know three measured parameters: length, width and height. First you need to calculate the volume of one bar using the formula V = a * b * l (here V is the volume, m³; a is the height, m; b is the width, m; l is the length, m)

Beam parameters: length, width, height

How many pieces of timber in a cube is determined by the formula:

Where, A - the number of timber in a cube, pieces;

1 - one cubic meter, m³;

V is the volume of one bar, m³.

2. How to determine how many pieces are in a cube of timber 100x150

In the price lists of construction companies, for convenience, they indicate the cross section of the beam, that is, its width and height, for example, 100x150. Where 100 is the width in millimeters and 150 is the height. The length is most often 6 meters, or 6000 mm.

The volume of a bar 100x150x6000 will be 0.09 m³.

V = 0.1 m * 0.15 m * 6 m = 0.09 m³. Here 0.1 is the width, m; 0.15 – height, m; 6 - beam length, m.

In this case, how much material will “fit” in one cubic meter can be found by dividing a cubic meter by the volume of one bar:

Where, 1 is one cubic meter, m³;

0.09 - calculated volume of one bar 100x150x6000, m³.

The characteristic shape of the beam section 100x150

So you can easily calculate how many pieces of timber in the purchased volume of material by multiplying the number of pieces by the number of cubes. For simplicity and speed of calculation, you can use the table: how many timber in a cube table is 6 meters.

3. How many edged boards in 1 cube

A similar situation is in calculating the amount of edged boards in 1 cubic meter of wood. For example, the board used has the following parameters 100x25x6000 (width, height, length).

The volume of one board will be 0.015 m³.

V = 0.1 m * 0.025 m * 6 m = 0.015 m³

Quantity in 1 cube:

That is, a cubic meter contains at least 66 boards. When buying a cube of edged boards 100x25x6000, you should get 67 pieces, rounding up. For example, when buying three cubes, you should get at least 201 pieces, and when buying six - 401.

4. How many in 1 cube of grooved floor board

The sheet pile floor for better installation has a groove along the entire length on one side, on the other - a spike. When calculating the volume of one board, its length, height and net width are taken into account, that is, the width without taking into account the protruding spike. For example, the size of the board shown in the figure below is 28x90 mm.

Grooved floor board

With a board length of 6 meters, its volume will be:

V = 0.09 m * 0.028 m * 6 m = 0.01512 m³

Quantity in 1 cube:

5. How many wooden lining in 1 cube

By design, the lining remotely resembles a sheet pile floor. It also has a groove-thorn connection, ventilation grooves, but the front side of the lining can have bevels, roundings and even a convex surface, imitating a beam.

For the calculation, the “net” width is used, that is, the size without taking into account the spike, the maximum value in the section of the board is taken as the height.

Types of lining with a good example of measuring the width and height of the board

The most common lining size is 100x14. With a board length of 6 meters, the number of lining in one cube will be at least 119 pieces:

The volume of one board:

V = 0.1 m * 0.014 m * 6 m = 0.0084 m³

Quantity in 1 cube:

On our website you can get acquainted with the most popular projects of houses from profiled timber from construction companies presented at the exhibition of houses "Low-Rise Country".

What else to consider when counting lumber

One of the nuances in the production of lumber is their technological length, that is, the declared six-meter board in practice turns out to be 5-10 cm longer. This deviation is called technological and is not taken into account when calculating the linear meters of the board. The seller in no case has the right to add them to the total length of the board.

When buying a beam of a certain section, it is important to measure the parameters during acceptance or loading, since the slightest deviation of even 1 cm leads to huge losses, especially with large purchase volumes.

In addition to volume, it is important to remember the weight of the purchased material, which depends on the density of the material and humidity.

An example of calculating the weight of a beam based on the known density of a tree (for material of different moisture content, the corresponding values ​​\u200b\u200bmust be substituted instead of 860)

Tables for quick calculation of the volume of timber

Below are cheat sheets to quickly find out how much timber is in a cube - the table contains not only the quantitative values ​​​​of material units in a cubic meter, but also the volumetric values ​​\u200b\u200bof bars of different sections. For example, a table will show how many boards are in a cube - a board or a bar will be 6 meters or 3 meters long.

1. How much in a cubic meter of timber 3 meters long

2. How much in a cubic meter of timber 6 meters long

If you need to find, for example, how many beams 100x100 in a cube, then in the table we look for a board of the right size and see the result - at least 16.67 pieces, and the volume of one beam 6 meters long is 0.06 m³.

On our site you can find contacts of construction companies that offer house design services. You can directly communicate with representatives by visiting the exhibition of houses "Low-Rise Country".

3. How many boards 2 meters long are in a cubic meter

4. How many boards 3 meters long are in a cubic meter

5. How many boards 6 meters long are in a cubic meter

When transporting materials, it is important to know not only the length of a unit of product, but also the total weight of the transported cargo, since the carrying capacity of the vehicle is limited by its design features.

6. How much in a cubic meter of timber 150x150 - calculations of weight and volume

Video description

An example of the calculation, see the following video:

Estimated difference in the price of timber 150x150 in different regions

The cost of a bar depends on the region of the country, the type of wood, the moisture content of the material, the method of delivery and many other factors. For comparison, data for a bar 150x150x6000 are taken. The type of material is pine. The cost of one cube is presented in the table.

Table. The cost of 1 cube of timber 150x150x6000 (pine) depending on the region.

Video description

What to look for when buying, see the following video:

Features of lumber storage

For building a house made of wood, it is important to properly store the material so that its moisture content is within 12%, if the humidity is higher, then the shrinkage of the building will be slower.

Here are a few rules to remember when storing lumber:

The storage area must be level and dry.

To prevent the ingress of moisture from the surface to the site, pallets are laid under the first layer of material, which can be replaced with scraps of boards or sleepers.

The distance between single products should be maintained within at least 2 cm, for better air circulation.

After 1-2 rows, crossbars are placed across the length, which can be all the same trimmings of boards.

If it is not possible to build a canopy over the storage area to prevent atmospheric precipitation, the stacks are covered with a film, excluding wrapping the ends, so as not to create a greenhouse effect inside.

Wood stacked for storage

Conclusion

Knowing the rules for calculating the required volume of building materials will help save time and money, or just make sure the builder is honest. Therefore, if there are no skills to quickly translate one value into another, then when discussing the required amount of building materials, you must keep at least a cheat sheet in the form of a cubic table.

Any construction work begins with a project and an estimate, which implies the calculation of the amount of materials. Edged board is one of the most popular materials from the assortment of timber merchants. The basic unit of measurement for any lumber is 1 m 3. However, it is important for the end user to know the number of boards in a cube of a certain length and thickness.

Instruction

Sometimes the manufacturer leaves a label on the materials indicating the price of the package and the exact volume. But often the storekeeper makes the measurement.

The calculation of cubic capacity will depend on the degree of processing of the material, type and grade. For example, edged and unedged boards are calculated differently. Also, for breeds, calculation methods can be different. For coniferous and deciduous, you can use both the measurement and multiplication of the sides, and the standard designed to calculate the volume. The second method is the use of a collection of tables, where each meter of length and one piece of material corresponds to a volume. They are called cubers.

To find the number of cut boards in 1 cube, you need to find out the volume of one of them by finding the product of three quantities, and then divide 1 m 3 by it.

Example:

• Section 150x25 mm
• Length 6 m

The first step is to translate all values ​​​​in meters: 150x25 mm \u003d 0.15x0.025 m

0.15 x 0.025 x 6 \u003d 0.0225 m 3

We determine how many boards are in one cube: we divide 1 m 3 by the cubic capacity (the volume of one board):

1 m 3 / 0.0225 = 44.4 pieces

Calculation may be required, for example, when determining the cost. So, if we take the price per cube equal to 6,500 rubles, then with a cubic capacity of 0.0225 m2, one will cost 146.25 rubles. But often the volume is rounded up to 0.023. And then the materials cost the buyer 149.5 rubles apiece. And when rounding the amount, the overpayment for 1 m 3 is 1%.

The calculation for unedged boards is made differently. If only one piece is purchased, then its length and thickness are measured in the same way as for edged material. But the width is taken as an average. For example, if it can vary from 15 to 23 cm at different ends, then you need to take the value in the middle.

If you need to find the volume of a large number of boards, then they need to be sorted in piles according to the maximum match in length and width. It is better if the error does not exceed 10 cm. The height of the stack is measured with a tape measure in the middle of the board and the length. The result is multiplied by a special coefficient, which depends on the air gap and is 0.07-0.09 units and is taken from the cubature reference book.

The table shows the estimated number of edged boards of spruce, pine, cedar and larch in a cube of lumber. The standard length is taken as 6 m, and the width is from 100 to 250 in 50 mm increments. The thickness is 25-50 mm.