# Advice 1: How to calculate acres

Weaving is a measure of area, which is used to calculate the cottagers their land. One hectare is equal to one hundred feet square, and in fact is the same as ar, which is now in people is almost never used in the calculation. How to calculate acres correctly, this question worries many people, in particular those who owns the land and is going to sell it or to increase in size. Instruction
1
Measure the length and width of your backyard or any other area, the area which you want to know in acres. This requires the corners of the plot to drive stakes, take a tape measure and measure the distance from one peg to another across the length and breadth of the land. As a rule, it is sufficient to make a measurement on one side length and one side of the width. since opposite sides are equal.

Write down on a sheet of paper the length and width. Assume that the length of your parcel is equal to 42 meters and width of 21 meters.
2
Calculate the square footage. You can use the knowledge of geometry and calculation by the formula of rectangle area. Area (S) of the rectangle, we recall, is equal to the product of the lengths of its sides. Thus, 42x21 = 882. S our area is equal to 882 square meters.
The area is calculated, it is equal to 882 square meters. It is known from the definition, that weaving is one hundred square meters. In order to know how many acres in your area of this square (882 square meters)perform the following mathematical calculations.
3
Divide the area of your site that you found in square meters per hundred. Thus, in response, you know, how many acres is your site. So, in our example, you 882 to divide by 100 and get of 8.82 acres, but of 8.82 acres, as noted earlier, this is the same as that of 8.82 Ara.
4
If the area of your lot is over 100 acres, there is a need to introduce another unit of measure is hectare. 100 acres will be equal to one hectare. Thus, in the case that the area of your lot is 10,000 square meters, respectively, it will be equal to 100 acres or 1 hectare.
Remember, the number of acres does not depend on the geometry of the section (oval, square, rectangle), it depends only on the square. Thus, if your site is round, for example, the order of the calculations is preserved. First calculate the total area of the plot, and then by dividing it by 100 will convert this area to acres.

# Advice 2 : How to convert hectares to square kilometers

Ar and hectare are metric units of area measurement. Usually in hectares and arakh measure the area of agricultural land. Ar is also called "weaving", due to the fact that ar is one-hundredth part of a hectare. Instruction
1
Ar

Ar (lat. area - area of surface) of land equal to one hundred square meters. This area is a square with side 10 meters. That is,

1 ar = 100 m2.

Thus, to convert Ares to square meters, just comnote number by one hundred. Do not forget to specify derived units.

For example,

30 ar = 3 000 m2;

0,5 ar = 50 m2;

Ar 9 000 000 = 900 000 000 m2.
2
Hectare

The prefix hecto - means 102. On this basis, it is easy to see that 1 hectare is 100 times more Ara

1 ha = 100 ar = 102 ar.

To convert hectares to square meters, comnote the number 10 000. Enter the resulting unit of measure.

For example,

5 hectares = 500 ar = 50 000 m2;

0.1 ha = 10 ar = 1 000 m2;

Of 0.001 ha = 1 ar = 10 m2.
3
If you want to translate acres, say, in square decimeters, comnote available number of hectares per 1 000 000:

1 ha = 1 000 000 dm2;

0.87 hectares = 870 000 dm2.
4
To translate acres into square kilometers, divide the number of hectares by 100 (comnote 10 in degree-2):

1 ha = 0,001 km2;

500 ha = 5 km2;

4,000 ha = 40 km2.
5
In some countries (e.g. UK, Canada, USA, Australia) to measure the area of land use such units as acres and square yards. These units are in English system of measures.

1 acre is numerically equal to 4840 square yards and about 4046.86 square meters.

1 acre = 4840 yd2 = 4046,86 m2 = 40,5, ar = 0, 405 ha;

1 yard ≈ 0,9144 m, therefore, 1 yd2 ≈ 0, 8361 m2.
Note
An interesting fact about hectare

Interestingly, Trafalgar square located in London, has an area of about one hectare.
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