Tulnest

Acres to Square Kilometers

1 Acre = 0.0040469 Square Kilometers

Common amounts:

About the acre to square kilometer conversion

The acre (ac) and the square kilometer (km²) are both units of area. Convert between area units — square meters, square kilometers, hectares, acres, square feet, square yards and square miles.

To convert acres to square kilometers, multiply by 0.0040469. To go back, multiply square kilometers by 247.1054.

Reference table

AcresSquare Kilometers
1 ac0.0040469 km²
5 ac0.020234 km²
10 ac0.040469 km²
25 ac0.10117 km²
50 ac0.20234 km²
100 ac0.40469 km²

Need the reverse conversion? Convert Square Kilometers to Acres.

Convert Acre to other area units

Frequently asked questions

How many square kilometers is 1 acre?
1 Acre equals 0.0040469 Square Kilometers. To go the other way, 1 Square Kilometer equals 247.1054 Acres.
What's the formula to convert acres to square kilometers?
Multiply the number of acres by 0.0040469 to get square kilometers. For example, 10 acres × 0.0040469 = 0.040469 square kilometers.
Does this converter handle decimals and very large numbers?
Yes. Type any real number, including decimals or values in the trillions. Math runs entirely in your browser — no server round-trip, no sign-up, and nothing to install.