Acre to Square Kilometer Converter

Convert acres (ac) to square kilometers (km²) instantly

= 0.004047
Square Kilometers (km²)
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How to Convert Acres to Square Kilometers

To convert acres to square kilometers, multiply the area value by 0.004047. This conversion factor is based on the definition of both units:

Square Kilometers = Acres × 0.004047

Quick Facts

  • 1 acre = 0.004047 square kilometers
  • 1 acre = 4,047 square meters
  • 1 square kilometer = 247.105 acres

Common Conversions

Acres Square Kilometers
1 acre 0.004047 km²
5 acres 0.02023 km²
10 acres 0.04047 km²
50 acres 0.20234 km²
100 acres 0.40469 km²