How to calculate the walls of the walls

If you started a repair, it is necessary to determine how much you will need a finishing material - paint, wallpaper, plaster, putty, glue. The exact number, without excessive reserve, and in any case no less. And for this you need to calculate the wall surface. Enough to appeal to geometry and to recall several formulas that will help to find this value.

The algorithm for calculating the area of \u200b\u200bthe walls in a standard room:

To calculate the area of \u200b\u200bthe walls of the room, prepare a tape measure, pen (also suitable pencil), building level (can be replaced by a long line) calculator.
Two walls in the room must be freed from furniture for the convenience operations.
To find the perimeter, attach tape measure to the wall, were measured on the plinth, note the value. In a rectangular room, measure the length of two walls that are adjacent to each other. This is sufficient for the further calculation.
We define the perimeter of the room by multiplying by 2 the sum of the lengths of two sides. P \u003d (a + b) * 2.
In a non-standard room fold the length of all the walls - this is the perimeter.
To determine the height of the stand on a stool, drag an upright position and measure its tape. Also, you can measure the value of the angle.
The area of \u200b\u200bthe walls is calculated as follows: multiply the perimeter of the room at its height. S \u003d P * N; F - perimeter of the room, H - height of the walls.

Features of the calculation of the area of \u200b\u200bthe wall in non-standard rooms:

If the room is difficult and has the shape of a circle, in order to calculate the area of \u200b\u200bthe walls using formula: S \u003d πR², where R - radius.
In the case of triangular location you need Heron's formula: S \u003d √ (P * (P - A) * (F - B) * (P - C)), where A - the length of one wall, In - length of the other, C - length third, P - half-perimeter of the room.
For non-standard forms to facilitate the calculation can proceed differently. Measure the dimensions of each wall and calculate the area separately, then folding these values. S1 + S2 + S3 etc.

However, not all of the area in the room to be finishing. To accurately determine the amount of material from the wall area to be subtracted area of \u200b\u200bwindow and door frames:

Measure the dimensions of the window. Window height is recommended to determine on a side slope. Width can be found by measuring the slope of the top or window sill.
The area of \u200b\u200ba standard window - this area of \u200b\u200ba rectangle, the height multiplied by the width.
For the calculation of the window area, which has a triangular form, using the following formula: S \u003d 0,5 * A * NA - window width, H - height.
Fold the square of all windows, if there are several.
Dimensions doors are not determined by her canvas, and taking as a basis the size of the box.
The area is calculated similarly as for ordinary rectangular wall.

Calculation example:

The length of one wall is 4 meters, the second - 3 meters, height is 2.5 m.
For example, a window has dimensions of 1.3 by 1.5 meters, and the door - 61 to 192 centimeters.
In this case, the perimeter is 14 meters (7 * 2).
Area - 14 * 2.5 \u003d 35 square meters.
The area of \u200b\u200bthe window opening will be 1.95 square meters, and the door - 1.1712.
Adding these figures, subtract them from the street. We get 32 \u200b\u200bsquare meters.

Often in the room are not only windows and doors, but also a variety of niches, recesses and projections. If there are niches and other recessed portions, it is necessary to measure their area and add to the total value. In the presence of the projections, ventilation ducts and plumbing portions of the area is calculated from the result.

In addition, the area of \u200b\u200bthe walls of the room can be found in the technical passport to the apartment and other documentation. But even in its absence, you already know how to calculate that value on its own.