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Square Kilometers to Ares Converter

Convert square kilometers (km²) to ares (a), 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.

A number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
The unit you want the answer in. Swap exchanges the two units.
Result
10,000 a
square miles
0.386102158542 sq mi
acres
247.105381467 ac
square yards
1,195,990.0463 sq yd
square feet
10,763,910.4167 sq ft
square inches
1,550,003,100.01 sq in
hectares
100 ha
square meters
1,000,000 m²
square centimeters
10,000,000,000 cm²
square millimeters
1,000,000,000,000 mm²
square micrometers
1 × 10¹⁸ µm²

1 km² = 10,000 a

Show the working
  1. 1 km² = 10000 a
  2. 1 × 10000 = 10000 a

How to convert square kilometers to ares

1 km² = 10,000 a, so multiply by 10,000 to go from square kilometers to ares. Going the other way, 1 a = 0.0001 km².

a = km² × 10,000
km² = a × 0.0001

Worked example:

1 km² = 10000 a
5 × 10000 = 50000 a

Square Kilometers to ares table

Square KilometersAres
1 km²10,000 a
2 km²20,000 a
3 km²30,000 a
4 km²40,000 a
5 km²50,000 a
6 km²60,000 a
7 km²70,000 a
8 km²80,000 a
9 km²90,000 a
10 km²100,000 a
15 km²150,000 a
20 km²200,000 a
25 km²250,000 a
30 km²300,000 a
40 km²400,000 a
50 km²500,000 a
75 km²750,000 a
100 km²1,000,000 a
250 km²2,500,000 a
500 km²5,000,000 a
1000 km²10,000,000 a

About the units

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

Formula version 0.1.0Reviewed