Modern Converts Logo

Modern Converts

Convert between different units quickly and accurately in a modern way

Choose a Measurement

Select a measurement and convert between different units

Convert Area from Are to Square Kilometer (a to km2)

Single conversion

On This Page

Are to Square Kilometer Conversion FormulaExampleWhat is an Are (a)?From Are to Hectare: A Common Land MeasurementThe History and Modern Use of the AreRelated Metric Units: Centiare, Decare, and HectareWhat is a Square Kilometer (km²)?How Big is a Square Kilometer?How is the Square Kilometer Used for Global Measurements?How Does a Square Kilometer Compare to a Square Mile?What is the metric system?Are to Square Kilometer Conversion Table

Are to Square Kilometer Conversion Formula

To convert from Are (a) to Square Kilometer (km2), use the following formula:

 Square Kilometer (km2)\textbf{ Square Kilometer} \text{ (km2)}

=100×1106× Are (a)= 100 \times \frac{1}{10^{6}}\times \textbf{ Are} \text{ (a)}

=1104× Are (a)= \frac{1}{10^{4}}\times \textbf{ Are} \text{ (a)}

=10−4× Are (a)= 10^{-4}\times \textbf{ Are} \text{ (a)}

Example

Let's convert 5 Are (a) to Square Kilometer (km2).

Using the formula:

5×10−4=0.00055 \times 10^{-4} = 0.0005

Therefore, 5 Are (a) is equal to 0.00050.0005 Square Kilometer (km2).

What is an Are (a)?

An are (a) is a metric unit of area, defined as 100 square meters (100 m²).

It is part of the same system as the more widely known hectare. The plural form is ares.

From Are to Hectare: A Common Land Measurement

The hectare (ha), a much more common unit for measuring land, is derived directly from the are.

The prefix 'hecto-' means 100, so one hectare is equal to 100 ares.

Since one are is 100 square meters, a hectare is equivalent to 10,000 square meters (100 ares × 100 m²/are). This makes the hectare an ideal unit for measuring large areas, such as farms, forests, and parks.

The History and Modern Use of the Are

The are was first established as part of the original French metric system in 1795. It was designed to serve as a standard base unit for measuring land, simplifying calculations required by older, traditional units.

While the hectare is more common today in agriculture and forestry, the are is still used in specific contexts, such as real estate and land registries in many countries, particularly throughout Europe.

The are serves as the foundation for other metric units of land area, making conversions straightforward. The most common related units include:

  • Centiare (ca): Equal to one-hundredth of an are. This makes a centiare precisely one square meter (1 m²).
  • Decare (daa): Equal to ten ares, or 1,000 square meters (1,000 m²). The decare is often used for land measurement in parts of Eastern Europe and the Middle East.
  • Hectare (ha): Equal to one hundred ares, or 10,000 square meters (10,000 m²).

What is a Square Kilometer (km²)?

A square kilometer (km²) is a unit used to measure area in the metric system.

It represents a square that is one kilometer long on each side, which equals one million square meters (10⁶ m²).

How Big is a Square Kilometer?

It can be challenging to visualize such a large area, so let's put it into perspective. A single square kilometer is equivalent to:

  • Approximately 247 acres.
  • About 140 international soccer fields.
  • The entire area of a large city park or a small urban neighborhood.

Due to its vast size, the square kilometer is a crucial unit for geographers, urban planners, and scientists when measuring large sections of land or water.

How is the Square Kilometer Used for Global Measurements?

When it comes to measuring our planet, the square kilometer is the standard unit of choice.

The total surface area of Earth is a massive 510 million square kilometers.

This total area is broken down into:

  • Land: Roughly 149 million km² (29.2% of the surface).
  • Water: Roughly 361 million km² (70.8% of the surface).

These figures show why the square kilometer is crucial for scientists studying global climate patterns, mapping population density, and managing natural resources.

How Does a Square Kilometer Compare to a Square Mile?

While much of the world uses the metric system, some countries (like the United States) use the imperial system, where large areas are measured in square miles.

A square kilometer is significantly smaller than a square mile. Here's the quick conversion:

  • 1 square kilometer = approximately 0.386 square miles.
  • 1 square mile = approximately 2.59 square kilometers.

Keeping this difference in mind is essential when comparing geographical data from different countries, whether you're examining the size of a national park or the area of a city.

What is the metric system?

The metric system is a decimal-based system of measurement used by nearly every country in the world. Its key feature is the use of prefixes to denote multiples and submultiples of the base units by powers of ten.

Are to Square Kilometer Conversion Table

Here are some quick reference conversions from Are (a) to Square Kilometer (km2):

AresSquare Kilometers
0.000001 a10−1010^{-10} km2
0.001 a10−710^{-7} km2
0.1 a10−510^{-5} km2
1 a10−410^{-4} km2
2 a0.00020.0002 km2
3 a0.00030.0003 km2
4 a0.00040.0004 km2
5 a0.00050.0005 km2
6 a0.00060.0006 km2
7 a0.00070.0007 km2
8 a0.00080.0008 km2
9 a0.00090.0009 km2
10 a0.0010.001 km2
20 a0.0020.002 km2
30 a0.0030.003 km2
40 a0.0040.004 km2
50 a0.0050.005 km2
100 a0.010.01 km2
1000 a0.10.1 km2
10000 a11 km2

List some Area Converters:

For all Area converters, choose units using the From/To dropdowns above.