Square Kilometer to Are Converter
Area · unit-converter
Convert Square Kilometer to Are 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: Square Kilometer (km2)
To: Are (a)
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.
About Are
The are is 100 m². It is a metric land-area unit that sits between square meters and hectares.
How to convert square kilometers to ares
1 square kilometer is equal to 10000 are:
1 km2 = (1000000 m² ÷ 100 m²) a = 10000 a
Each square kilometer is defined as 1000000 m² and each are as 100 m², so one km2 equals 1000000 ÷ 100 a = 10000 a.
Let a(km2) be the numeric value of the same area measured in Square Kilometer (km2), and a(a) the value in Are (a). Then:
a(a) = a(km2) × (1000000 / 100)
Equivalently, divide by how many km2 fit into one a (m² per a divided by m² per km2):
a(a) = a(km2) ÷ 0.0001
Or: are = square kilometer ÷ 0.0001
Examples
Example #1: Convert 20 km2 to are
20 km2 = 20 km2 × (1000000/100) a = 200000 a
20 km2 = 20 km2 ÷ 0.0001 = 200000 a
Example #2: Convert 50 km2 to are
50 km2 = 50 km2 × (1000000/100) a = 500000 a
50 km2 = 50 km2 ÷ 0.0001 = 500000 a
Summary
To convert Square Kilometer to Are, multiply the value in km2 by the ratio of square meters per km2 divided by square meters per a. Equivalently: value_a = value_km2 × (1000000 / 100). Numerically, 1 km2 equals 10000 a.
Relationship context
Both units are metric (SI) and tied to the square meter. Conversions use exact ratios from their m² definitions. The factor from Square Kilometer to Are is 1.000000e+4 (1 km2 = 10000 a).
Conversion tables
| Square Kilometer (km2) | Are (a) |
|---|---|
| 0.1 | 1,000 |
| 1 | 10,000 |
| 2 | 20,000 |
| 3 | 30,000 |
| 4 | 40,000 |
| 5 | 50,000 |
| 6 | 60,000 |
| 7 | 70,000 |
| 8 | 80,000 |
| 9 | 90,000 |
| Square Kilometer (km2) | Are (a) |
|---|---|
| 10 | 100,000 |
| 20 | 200,000 |
| 30 | 300,000 |
| 40 | 400,000 |
| 50 | 500,000 |
| 60 | 600,000 |
| 70 | 700,000 |
| 80 | 800,000 |
| 90 | 900,000 |
| 100 | 1,000,000 |