Convert Are to Square Kilometer

One a equals 0.0001 km². This converter allows you to easily convert between Are and Square Kilometer in real time.

Formula

a × 0.0001 = km²

Example: 1 a = 0.0001 km²

What is Are?

The are is a unit of area equal to 100 square meters, or a square 10 meters on each side. It was introduced as part of the metric system during the French Revolution. While less commonly used today than the hectare (which equals 100 ares), the are still appears in land registration documents and real estate descriptions in some countries. In Japan and parts of Europe, small plots of land may be described in ares. The prefix "hect-" in hectare literally means one hundred ares.

What is Square Kilometer?

The square kilometer is a unit of area equal to a square with sides of one kilometer, or 1,000,000 square meters. It is the standard unit for expressing the area of countries, states, cities, and large geographical features. For example, France covers approximately 640,000 km² and Tokyo spans about 2,194 km². In geography, environmental science, and urban planning, square kilometers are used for land-use analysis, forest coverage, and natural reserve boundaries.