Decare to Square Kilometer Converter
Area · unit-converter
Convert Decare 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: Decare (daa)
To: Square Kilometer (km2)
About Decare
The decare equals 1,000 m² (10 ares). It is used in agriculture and land records in parts of Europe and the Middle East.
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 decares to square kilometers
1 decare is equal to 0.001 square kilometer:
1 daa = (1000 m² ÷ 1000000 m²) km2 = 0.001 km2
Each decare is defined as 1000 m² and each square kilometer as 1000000 m², so one daa equals 1000 ÷ 1000000 km2 = 0.001 km2.
Let a(daa) be the numeric value of the same area measured in Decare (daa), and a(km2) the value in Square Kilometer (km2). Then:
a(km2) = a(daa) × (1000 / 1000000)
Equivalently, divide by how many daa fit into one km2 (m² per km2 divided by m² per daa):
a(km2) = a(daa) ÷ 1000
Or: square kilometer = decare ÷ 1000
Examples
Example #1: Convert 20 daa to square kilometer
20 daa = 20 daa × (1000/1000000) km2 = 0.02 km2
20 daa = 20 daa ÷ 1000 = 0.02 km2
Example #2: Convert 50 daa to square kilometer
50 daa = 50 daa × (1000/1000000) km2 = 0.05 km2
50 daa = 50 daa ÷ 1000 = 0.05 km2
Summary
To convert Decare to Square Kilometer, multiply the value in daa by the ratio of square meters per daa divided by square meters per km2. Equivalently: value_km2 = value_daa × (1000 / 1000000). Numerically, 1 daa equals 0.001 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 Decare to Square Kilometer is 1.000000e-3 (1 daa = 0.001 km2).
Conversion tables
| Decare (daa) | Square Kilometer (km2) |
|---|---|
| 0.1 | 0.0001 |
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 4 | 0.004 |
| 5 | 0.005 |
| 6 | 0.006 |
| 7 | 0.007 |
| 8 | 0.008 |
| 9 | 0.009 |
| Decare (daa) | Square Kilometer (km2) |
|---|---|
| 10 | 0.01 |
| 20 | 0.02 |
| 30 | 0.03 |
| 40 | 0.04 |
| 50 | 0.05 |
| 60 | 0.06 |
| 70 | 0.07 |
| 80 | 0.08 |
| 90 | 0.09 |
| 100 | 0.1 |