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Ares to Square Kilometers Converter

Convert ares (a) to square kilometers (km²), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Enter an area, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.

About valueA number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
About toThe unit you want the answer in. Swap exchanges the two units.
Result
Result
0.0001 km²
square miles
3.86102158542 × 10⁻⁵ sq mi
acres
0.0247105381467 ac
square yards
119.59900463 sq yd
square feet
1,076.39104167 sq ft
square inches
155,000.310001 sq in
hectares
0.01 ha
square meters
100 m²
square centimeters
1,000,000 cm²
square millimeters
100,000,000 mm²
square micrometers
100,000,000,000,000 µm²

1 a = 0.0001 km²

Show the working
  1. 1 a = 0.0001 km²
  2. 1 × 0.0001 = 0.0001 km²

How to convert ares to square kilometers

1 km² = 10,000 a, so divide by 10,000 to go from ares to square kilometers (1 a = 0.0001 km²).

km² = a ÷ 10,000
a = km² × 10,000

Worked example:

1 a = 0.0001 km²
5 × 0.0001 = 0.0005 km²

Ares to square kilometers table

AresSquare Kilometers
1 a0.0001 km²
2 a0.0002 km²
3 a0.0003 km²
4 a0.0004 km²
5 a0.0005 km²
6 a0.0006 km²
7 a0.0007 km²
8 a0.0008 km²
9 a0.0009 km²
10 a0.001 km²
15 a0.0015 km²
20 a0.002 km²
25 a0.0025 km²
30 a0.003 km²
40 a0.004 km²
50 a0.005 km²
75 a0.0075 km²
100 a0.01 km²
250 a0.025 km²
500 a0.05 km²
1000 a0.1 km²

About the units

Square Kilometers (km²)
Square kilometers, a metric unit. Definition: BIPM SI Brochure (SI prefixes).

Formula version 0.1.0Reviewed