Square kilometers to Acres converter

To convert square kilometers to acres, enter the value in the first field. The result in acres is calculated automatically using the exact conversion factor.

1 km² ≈ 247.105381467 ac
1 ac = 0.0040468564224 km²

Formula: ac ≈ km² × 247.105381467
km² = ac × 0.0040468564224

Definitions: 1 km² = 1000000 m²; 1 ac = 43560 ft²

The square kilometer (km²) is one million square meters. It is used for the area of cities, lakes, countries and other large regions.

The acre (ac) is 43,560 square feet, about 4,047 square meters or 0.4047 hectares. It is used for land area in the United States and, informally, in the United Kingdom and Canada, and traditionally it was the area a team of oxen could plow in a day.

See the conversion table with commonly used values, handy for quick reference or study.