Are to Square Kilometer Converter

Area · unit-converter

Convert Are to Square Kilometer with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use square-meter-based definitions (international feet / yard standards, acre, hectare, and regional units like pyeong/tsubo).

Calculator

From: Are (a)

To: Square Kilometer (km2)

About Are

The are is 100 m². It is a metric land-area unit that sits between square meters and hectares.

About Square Kilometer

The square kilometer is a metric unit equal to one million square meters. It is standard for city sizes, large properties, and regional planning in metric countries.

How to convert ares to square kilometers

1 are is equal to 0.0001 square kilometer:

1 a = (100 m² ÷ 1000000 m²) km2 = 0.0001 km2

Each are is defined as 100 m² and each square kilometer as 1000000 m², so one a equals 100 ÷ 1000000 km2 = 0.0001 km2.

Let a(a) be the numeric value of the same area measured in Are (a), and a(km2) the value in Square Kilometer (km2). Then:

a(km2) = a(a) × (100 / 1000000)

Equivalently, divide by how many a fit into one km2 (m² per km2 divided by m² per a):

a(km2) = a(a) ÷ 10000

Or: square kilometer = are ÷ 10000

Examples

Example #1: Convert 20 a to square kilometer

20 a = 20 a × (100/1000000) km2 = 0.002 km2

20 a = 20 a ÷ 10000 = 0.002 km2

Example #2: Convert 50 a to square kilometer

50 a = 50 a × (100/1000000) km2 = 0.005 km2

50 a = 50 a ÷ 10000 = 0.005 km2

Summary

To convert Are to Square Kilometer, multiply the value in a by the ratio of square meters per a divided by square meters per km2. Equivalently: value_km2 = value_a × (100 / 1000000). Numerically, 1 a equals 0.0001 km2.

Relationship context

Both units are metric (SI) and tied to the square meter. Conversions use exact ratios from their m² definitions. The factor from Are to Square Kilometer is 1.000000e-4 (1 a = 0.0001 km2).

Conversion tables

Are (a)Square Kilometer (km2)
0.10.00001
10.0001
20.0002
30.0003
40.0004
50.0005
60.0006
70.0007
80.0008
90.0009
Are (a)Square Kilometer (km2)
100.001
200.002
300.003
400.004
500.005
600.006
700.007
800.008
900.009
1000.01