Convert acres to square kilometers
Select how many decimal places the result will be rounded to:
How to convert acres to square kilometers
To convert acres to square kilometers, multiply a acres value by 0.0040468564224.
Formula km² = ac × 0.0040468564224
Example: Convert 1000 acres to square kilometers Calculations: 1000 ac × 0.0040468564224 ≈ 4.0469 km²
Acre (ac)
The acre is an imperial and US customary systems unit of area, defined as the area of a rectangle with sides of 66 and 660 feet. It is approximately equal to 0.4047 hectares.
Square kilometer (km²)
The square kilometer is a unit of area in the metric system, defined as the area of a square with sides of 1 kilometer. It is approximately equal to 0.3861 square miles.
Browse related converters
Acres to Square meters Acres to Square miles Acres to Square yards Acres to Square feet Acres to Square inches Acres to Hectares