How to calculate lumber in a cube. How to correctly calculate the cubic capacity of an unedged board? Edged and floor board: their features and differences

Specify dimensions in millimeters

W- board width
H- board thickness
L- board length

Initial data
N- quantity in pieces
E- quantity in cubic meters
Many, when building a house or a bath, are faced with the need to calculate how much lumber is required for work. Determining how much board or timber you need is simple. But the price of lumber is usually indicated per cubic meter, and in this case it will be more convenient to use a special program for calculations. With the help of 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, furniture manufacturing, 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, maintains a stable humidity and does not require special treatment and care, which makes it especially convenient.

Types of lumber

Timber includes timber, edged boards, unedged boards, building slats. The beam is a log processed from all sides. In the cut, it has a square or rectangular section. The timber is most widely used in the construction of houses, baths and floor structures.
The edged board is a versatile lumber that is actively used both in construction work outside the building and in the design of the interior space. Edged board in cross section is an elongated rectangle. An unedged board differs from an edged board in that its edges are not cut off, so that a layer of the bark of the tree from which this board was cut remains visible. A building rail or bar is a bar with a smaller section than a regular one and is widely used in construction.
Lumber is classified according to the type of wood from which it is made. They are made from coniferous trees such as pine, spruce and larch. And from hardwoods such as oak and beech, birch, aspen.
Lumber is also distinguished by moisture content. They are divided into raw with a moisture level of more than 22 percent and dry with a moisture content below 22 percent. The former are used for construction work, and the latter for the manufacture of furniture.
There are also several varieties of lumber. The choice of grade depends on the application. So, for furniture, materials of the highest grade are used. For joinery and moldings, grade 1 lumber is suitable, and grade 2 and 3 are used exclusively as a building board. Lumber, if not used for a long time, must be protected from moisture. This can lead to their deterioration. It is not recommended to store lumber stacked on top of each other. There must be spacers between the layers of beams or boards.

Content:

The seller and buyer of timber pursue their own interests. In such a rather delicate matter, one must have certain - simple - knowledge. Today everyone has a tool: a calculator in the phone.

What is a cubic meter of edged board

How many edged boards in one cube - Photo

Edged board- lumber with cleanly cut edges, without bark residues. The width of the edged board exceeds the thickness at least twice.

Since the fee is charged for the volume in cubic meters, we recall the geometric formula for its definition:

W * H * D = volume.

Everything is in meters.

To find out how many boards are in one cube:

1 / (W * H * D) = number of boards in 1m3 (cube)

where, W- Width, AT- Height, D- Length

Translation: 1mm=0.001m, 10mm=0.01m, 100mm=0.1m

Below is a table of some types of edged boards and their volume

Board dimensions	The volume of one board	Boards in 1m3 (cube)
20×100×6000	0.012 m³	83 pcs.
20×120×6000	0.0144 m³	69 pcs.
20×150×6000	0.018 m³	55 pcs.
20×180×6000	0.0216 m³	46 pcs.
20×200×6000	0.024 m³	41 pcs.
20×250×6000	0.03 m³	33 pcs.
25×100×6000	0.015 m³	67 pcs.
25×120×6000	0.018 m³	55 pcs.
25×150×6000	0.0225 m³	44 pcs.
25×180×6000	0.027 m³	37 pcs.
25×200×6000	0.03 m³	33 pcs.
25×250×6000	0.0375 m³	26 pcs.
30×100×6000	0.018 m³	55 pcs.
30×120×6000	0.0216 m³	46 pcs.
30×150×6000	0.027 m³	37 pcs.
30×180×6000	0.0324 m³	30 pcs.
30×200×6000	0.036 m³	27 pcs.
30×250×6000	0.045 m³	22 pcs.
32×100×6000	0.0192 m³	52 pcs.
32×120×6000	0.023 m³	43 pcs.
32×150×6000	0.0288 m³	34 pcs.
32×180×6000	0.0346 m³	28 pcs.
32×200×6000	0.0384 m³	26 pcs.
32×250×6000	0.048 m³	20 pcs.
40×100×6000	0.024 m³	41 pcs.
40×120×6000	0.0288 m³	34 pcs.
40×150×6000	0.036 m³	27 pcs.
40×180×6000	0.0432 m³	23 pcs.
40×200×6000	0.048 m³	20 pcs.
40×250×6000	0.06 m³	16 pcs.
50×100×6000	0.03 m³	33 pcs.
50×120×6000	0.036 m³	27 pcs.
50×150×6000	0.045 m³	22 pcs.
50×180×6000	0.054 m³	18 pcs.
50×200×6000	0.06 m³	16 pcs.
50×250×6000	0.075 m³	13 pcs.

When buying lumber in small quantities, you can get confused with decimal places, namely with rounding. An experienced seller will round the resulting number to the 3rd decimal place. The experienced buyer will round up GOST y - up to 0.000001 cubic meters and remind the seller that up to 0.001 cubic meters. meters are rounded only a batch of boards. The most common quantity - from several boards to 2-4 cubic meters - does not make up a batch. In order not to offend either one or the other, they are rounded to 4 decimal places.

Then the resulting volume is multiplied by the cost of 1 m3 (cube). And here the number of decimal places can significantly affect costs.

1 edged board 32 mm thick, 200 mm wide and 6 m long(32X200X6000) has volume

• 0.032 * 0.2 * 6 = 0.0384 cubes

30 boards will have volume

• 0.0384 * 30 = 1.152 cubes

If the seller rounds the volume of 1 board to 0.04 cubic meters, he will additionally receive income:

• 0.04 * 30 \u003d 1.2 cubes
• 1.2 - 1.152 = 0.048 cubes

Selling these 0.048 "air" cubes makes the buyer's wallet easier

The cost may vary depending on the type of wood. Grading decreases with a decrease in quality: the presence of wood defects and deviations from standard sizes. If the floorboard has a curvature, narrower or thinner than the standard by 3-5 mm, it will not work completely. Visual inspection of the lumber is just as important as accurate sizing.

Edged board area covered

To find out how much lumber you need, the calculation of the board in a cube will help you. The above formula is based on the definition of area

W * D = area.

Having calculated the covered area, it remains to multiply it by the desired thickness of the board

W * D * 0.022; 0.025; 0.032; 0.04m and so on.

It remains to see how many boards are in one cube, and determine the required number. Just in case, print or memorize the table above.

You also need to take into account the future cutting of the material.The floorboard and sheathing board "lining" have an overlapping tongue, which is taken into account in the cubature, but is not included in the area to be covered. A couple of boards are needed have in reserve .

Determining the volume of unedged boards

How many unedged boards are in one cubic meter - Photo

Unedged board, that is, not having a rectangular section along the entire length, is much cheaper and is widely used for the installation of various kinds of rough battens, temporary fences.

It is important to understand that the top and bottom of such a board must be sawn along the entire length. If one face is not propylene, then this is already croaker. The definition of the cubic capacity of such lumber differs precisely in that it does not have the correct geometric shape.

The current standards establish several ways to account for unedged material, and it is almost impossible to calculate exactly how many boards are in 1 cube.

1. Batch.
2. Piece by piece.
3. Sampling method.

In batch In this case, the boards are tightly packed into a bag of the correct shape with further measurement. Further calculation is carried out according to the standard formula for determining the volume. using various coefficients.

Piece measurement made according to average measurements of height and width. The largest and smallest dimensions in meters are added and divided in half.

(Wmax + Wmin) / 2 * (Hmax + Hmin) / 2 * L = volume, m3

where, W- Width, AT- Height, D- Length

If it is visually visible that the wood is fresh and, accordingly, damp (humidity above 20%), then the seller is obliged to reduce the total volume by multiplying the received cubic capacity by the coefficient:

• 0,96 for softwood
• 0,95 for deciduous.

Sampling method used to determine the volume of a large batch of unedged lumber. When loading, for example, into the body of a vehicle, every fifth, tenth or twentieth board is measured using the second method.

The resulting volume is multiplied by five, ten, twenty. Loading continues to the next control board. The selection of control boards in a separate foot is also practiced. The calculation is made after the loading is completed.

Calculating the volume of a bar: how much is a bar in a cube?

Calculation of the amount of timber in one cube - Photo

The beam differs from the edged board only in that all its faces or two opposite ones have the same size: more than 0.05 m in thickness and 0.013 m in width. The formula for determining its volume is standard

R beam size	The volume of one bar	Bar in 1m3 (cube)
100×100×6000	0.06 m³	16 pcs.
100×150×6000	0.09 m³	11 pcs.
150×150×6000	0.135 m³	7 pcs.
100×180×6000	0.108 m³	9 pcs.
150×180×6000	0.162 m³	6 pcs.
180×180×6000	0.1944 m³	5 pieces.
100×200×6000	0.12 m³	8 pcs.
150×200×6000	0.18 m³	5.5 pcs.
180×200×6000	0.216 m³	4.5 pcs.
200×200×6000	0.24 m³	4 things.
250×200×6000	0.3 m³	3 pcs.

W * T * D = volume of timber, m3.

To find out how much timber is in one cube

1 / (W * T * D) = amount of timber in 1 m3 (cube)

where, W- Width, T- thickness, D- Length

Translation: 1mm=0.001m, 10mm=0.01m, 100mm=0.1m

When buying a beam, the volume must be determined by the piece, since the beam is laid with spacers in the stack. The measurements of such a stack and the calculation of the cubature according to the above formula invariably lead to a significant overestimation of the volume.

Length of 1 cube of timber (and any edged lumber) in meters is determined by dividing the unit by thickness and width. For example, you need to find out how much timber is in one cube - a face of 180 mm.

1 / (0.18 * 0.18) = 30 meters 87 cm.

1 meter of such a bar will have the following volume.

0.18 * 0.18 * 1 = 0.0324 m3.

These calculations may be needed when determining the cost of funds and material.

Construction log volume: how many logs are in one cube?

How many logs in one cube: calculation - Photo

Log buildings are and will be relevant. The determination of the volume of round material depends on the method of its production.

• Construction log of manual debarking.
• Construction log, rounded on special machines.

The section of the barrel for trimming by hand has the shape of a slightly truncated cone, so the cylinder volume formula is used, but with some peculiarities.

3.14 * r2 * L = log volume, m3

Here
r- average radius, calculated as (r1+r2)/2, r1 is the radius from one end of the log, r2 is the radius from the other end of the log.
L- log length.
3,14 - constant "Pi".

The rounded log has, of course, a cylindrical shape and is calculated according to the above formula. But here the radius is measured at any end once. Determining the number of logs in 1 cube is determined similarly to a beam.

1 / (3.14*r2 * L) = Number of logs in 1m3 (cube)

Blanks for construction logs are measured in the same way.

The radius (diameter divided in half) is measured without taking into account the thickness of the tree bark. In practice, manual calculations are not carried out. They use special tables summarized in a cubature book. They are also available in electronic form.

In conclusion, it should be noted that lumber for critical work, standard in size, wood species and humidity, should be purchased at large sites. A small producer, as a rule, is not allowed there due to the lack of appropriate control over the quality of their products.

This article will detail the information that will allow you to most correctly calculate the amount of lumber in a cubic meter of a wooden board. To date, edged and unedged board is the most popular lumber. Manufacturers produce numerous variations of this material in sizes from 16x8 mm to 250x100 mm.

At the same time, the width of the board is always at least twice the thickness, if the aspect ratio changes, the material is already called a beam. It is customary to measure an edged board in cubic meters, therefore, to determine the cost of work, you need to learn how to determine the weight of a cube of an edged board. Fortunately, there are ready-made tables and formulas that will allow you to quickly deal with this task.

As a rule, most novice builders do not think about the question “a cubic meter of boards is how much » but simply use the table below. However, we strongly recommend that you learn how to calculate the cubature yourself, this will greatly simplify the work, and only in this case you can consider yourself a professional.

If we compare an edged board with an unedged or one-sided edged board, on the surface of the first there are no places where the bark used to be, this parameter is called wane. A small amount of wane is generally allowed, but the smaller the amount, the better. So in terms of geometry, such a board is guaranteed to be a rectangular parallelepiped. This figure has three parameters: thickness, width, length, which are usually expressed by the letters a, b, l. These indicators are enough to know how to calculate the cubature of the board in a few seconds.

It is important to know that there is an official standard according to which boards can only be produced with the “a” parameter equal to 22, 25, 30, 40, 50, 100 mm. There are also other lumber that are made from others by planing or sawing. Their width varies from 100 to 250 mm, step 50 mm. The length of such boards can be 3, 4, 6 m.

Formula for calculating cubature

Thickness * Width * Length

(a*b*l)

Once you know all the values, you can quickly answer the question of how to calculate the cubature of the board. Before calculations, you need to convert all values ​​\u200b\u200bto meters. For example, we have a board measuring 25 mm x 10 cm x 4 m, when translated into meters, we get 0.025, 0.1, 4. Now we multiply these parameters:

0.025 * 0.1 * 4 = 0.01

Now we divide the unit by the result and find out how to calculate the cube of boards, or rather the number of boards in a cube of wood.

1 / 0.01 = 100

Thus, a cubic meter will contain 100 boards of the indicated sizes. Now you can easily answer the question of how to calculate the cube of boards, but you need to learn how to count the amount of lumber needed to complete the work.

What is an inch board and how to calculate its cubic capacity

An inch is just the name of one of the dimensions of the boards, there are also forties, fives, beams, this allows the builder to quickly figure out which board is in question. To find out how many inches of an inch board are in a cube, we need to make the calculations already familiar to us, as a result of which we get 66 pieces with a board width of 10 cm, and 44 pieces with a board width of 15 cm. As a rule, one cubic meter is enough to cover an area of ​​40 square meters.

As already mentioned, there is also an unedged board, which is obtained as a result of longitudinal sawing of logs without processing on the sides. So it is usually somewhat more difficult to find the answer to the question of how many boards in a cube of unedged boards than in the first case. The fact is that for unedged lumber, only the width and length are accurately indicated, but the width can vary. Much depends on which part of the tree a certain board is cut from. If you are wondering how to consider the cubic capacity of an unedged board, you first need to think about the task at hand.

For example, you may need to sheathe a building, in which case you will first find out the finishing area and multiply it by the thickness of the sheathing, this will allow you to calculate the required amount of material. Let's describe this situation in numbers:

How many unedged boards with a thickness of 25 mm may be needed for the sheathing of a rectangular structure 10 * 5 meters and 3 meters high?

We calculate the entire area for decoration, for this we multiply the perimeter of the building by its height: (10 + 10 + 5 + 5) * 3 = 90 square meters. Now we multiply the obtained value by the thickness of the material: 90 * 0.025 (translate millimeters into meters) = 2.25 cubic meters.

As you can see, in this case, the width of an individual cladding element practically does not matter, since this does not affect the overall cubic capacity. However, sometimes it may still be useful for you to know the average dimensions of the board, which will allow you to approximately find out how many unedged boards are in a cube. These approximate data are shown in the table.

High cost and makes you think about their rational use. has always been one of the most expensive. If you actively use it, then it is advisable to know in advance how many boards are in the cube. A table with reference data will allow you to determine the required value. You can use the board cubature calculator, which allows you to change the geometric parameters of other products online, you can calculate the cubic meter yourself. We offer you to get acquainted with the most popular types of materials and the features of their calculation.

planed timber

planed block

The cross-sectional shape may be different. Manufacturers offer a bar with a square, rectangular or other sectional shape. The requirements for the aspect ratio of the finished product are established. Their width cannot be twice the thickness. The last linear dimension can reach 100 mm.

Planed products subjected to special processing have a smooth surface. They are widely used in the construction of various, the appearance of which is subject to increased requirements. Actively used in industry.

Edged bar

Unlike planed, edged timber is not subjected to additional finishing. This greatly reduces its cost. It is widely used in the construction and installation of structures intended for the installation of facing material.

Edged board

For such lumber, the thickness can reach 100 mm, and the transverse dimensions in this case should be at least twice as large. During the production process, wood is processed from all sides. As a result, it is possible to provide the necessary geometric accuracy and relative evenness of the surface.

Edged material is used when performing various types of work. The inch board is especially popular, the size of which is numerically equal to 1 inch (25 mm). This thickness is in demand when arranging battens, floors and many other surfaces.

How to calculate a cube? It is enough to multiply the linear parameters to find the volume of one product. Then one cube is divided by the resulting value. This will allow you to find out how many products will be in a cubic meter. Knowing the required number of products and how many of them are in a cube, it is easy to calculate the order volume.

edged board

Floor board

Designed specifically for the device. It has a width of 85÷140 mm with a thickness of 27÷45 mm. The choice of linear parameters of the product is made taking into account the subsequent operational load. An online calculator of boards in a cube will allow you to calculate how much material you need to purchase for a floor covering of a certain area.

floor board

Unedged materials

Unlike edged material, such lumber has a lower cost, since there are partially sawn or unsawn edges (wane) on its surface. Because of this, it is most often used in the manufacture or construction of draft surfaces.

How many boards in a cube: a table with standard sizes

Knowing how many square meters are required, how many boards will be in a cube, depends on the linear dimensions of the selected material. Using special reference books (cubes), you can find the desired amount from the tables without tedious calculations.

How many boards in a cubic meter: the table will allow you to find out without calculation

Reference tables contain information data for lumber of various lengths. Before you find out from the table how many boards are in a cubic meter, you should check all linear parameters, and not just the width and thickness.

The most popular are reference tables for boards with 4 or 6. So, if we talk about how many edged boards sized 25 by 100 mm will be in a cube, you should definitely specify the length. Four-meter - 100 pieces, six-meter - 66 (66.6). Based on this, it is determined how many cubes of lumber are required.

Advice! If it is difficult to find reference tables, use the cubic meters calculator, which will help you perform the necessary calculation in a split second.

Having determined the amount according to the table, it is worth finding out how much the cube of the board weighs. To do this, you need to know the moisture content of the material. To find the answer to the question, you need to multiply the density by the volume, expressed in cubes. The basic procedure for calculating the number of boards in a cubic meter

Before moving on to basic calculations and learning how to calculate a cube, you should pay attention to the unit of measurement. For timber, the unit of volume is the cubic meter. Often, cubic meters, cubic meters or cubic meters are used as a conventional designation.

Attention! One cubic meter is numerically equal to the volume of a cube whose edges are 1 meter long.

V = L×h×b , where

• V - the desired volume of the cube, m³;
• L – product length, m;
• h – height/thickness of the material, m;
• b - width, m.

Attention! All linear parameters must be expressed in meters. If dimensions are given in millimeters, each original value must be multiplied by 0.001 to convert to meters.

With the same number of square meters, how many products will be in a cubic meter will depend on the chosen thickness. If the height of the material used is large, then, according to the calculations in the cube, a smaller value will be obtained. By reducing the thickness of the board, you can increase the number of purchased products.

When determining how many boards are needed, it is necessary to take into account the degree of processing of the material, the grade and type of wood that was used for production. For edged and unedged lumber, the calculation will be slightly different. The calculation should be adjusted to take into account the usable area.

When calculating how much trimming material is needed, you should:

• Determine the linear dimensions of one board;
• Find the volume of one product;
• Divide 1 (cube) by the volume of one board to figure out how much will be in one cube. According to the calculations, it may not be an integer value.

To find out how much unedged board you need, you have to take measurements at several points. After that, the desired linear size is averaged, and the found value is subsequently used when performing calculations.

If there are a lot of boards, and their linear dimensions differ, proceeding to the calculations, they sort by length and width. It is desirable that the linear parameters differ by a maximum of 10 cm. Then the height and length of the formed stack are measured. Height is measured in the middle. The result obtained is multiplied by a correction factor, the numerical value of which is 0.07 ÷ 0.09 units. Its value can be found in the cubature reference book.

Board cubic capacity calculator

If you need to perform a calculation, the board cube calculator below will allow you to find the value you are looking for in a matter of seconds.

Repair and construction work often involves the use of lumber. But shops, timber trading bases sell them more often not in pieces, but in cubes.

Everything is very simple and fast.

Method for calculating edged lumber

• caliper, tape measure or folding m, with known parameters of the length of wood products, you can limit yourself to a regular ruler;
• calculator - a mobile phone, a smartphone will do, if there may be problems with the account “in the mind”;
• a piece of paper and a pencil - to record the results of the calculations, how many boards are in the cube.

1. Volume = Length × Height (product thickness) × Width.

To prevent confusion when converting cubic centimeters to cubic meters, it is more convenient to immediately record the measurement results in meters.

For example, 0.132 cu. m = 6 m × 0.022 m (2.2 cm) × 0.10 m (10 cm).

Now, to determine the number of boards in a cube, you need 1 cube. m divided by 0.132. The result obtained (7, 5757) when purchasing timber must be rounded up to 8 units.

This method of calculating cubic capacity is also suitable for timber. So you can determine how many cubes of timber you need to purchase if you know the required number of products, or, conversely, determine the required number of cubes.

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How to calculate the cube of an unedged board?

To determine the required volume of timber, the easiest way is to carry out calculations similar to the above method. Only the final result needs to be multiplied by 1.2 - a correction factor. From unedged boards you can get no more than 70-80% of edged boards.

The width and thickness of each product is measured taking into account its further processing. The technique will help determine the number of cubes of wooden products needed for work, if the final result is planned for their further processing - trimming.

When buying, the widest and thinnest boards are measured to get an average width. If the width of the lumber at the butt is wider than at the top, the arithmetic mean of their dimensions is used without taking into account the bast layer or bark, rounded up to 10 mm. In this case, fractions from 5 mm are rounded up to full 10 mm, and fractions up to 5 mm are not taken into account. The length and thickness of lumber are measured in the usual way. The volume of timber is determined according to the usual scheme:

• the volume of one product is calculated;
• the total cubic capacity of the purchased timber is determined; according to GOST, correction factors are used: 0.96 - for sawn softwood, 0.95 - for sawn hardwood.

In addition to the piece by piece method for determining the volume of unedged lumber, a geometric method can be used.

Requirements for a package of unedged timber:

• lumber is laid tightly, without overlaps, in horizontal rows;
• on one side the ends of the boards are aligned;
• all sides of the package are strictly vertical: according to GOST, the displacement of individual products outward, inward should not exceed 0.10 m;
• the entire length of the lumber package must be of the same width.

Then the volume of the package is calculated, the result is multiplied by the coefficient: