Marks Calc

acres to square kilometers

Convert acre to square kilometer — instant, free, with the formula shown.

1 ac=0.004047 km²

How to convert acre to square kilometer

To convert acre to square kilometer, multiply by 0.00404686:

km² = ac × 0.00404686

For example, 10 ac × 0.004047 = 0.040469 km².

ac to km² conversion table

acres (ac)square kilometers (km²)
1 ac0.004047 km²
2 ac0.008094 km²
5 ac0.020234 km²
10 ac0.040469 km²
25 ac0.101171 km²
50 ac0.202343 km²
100 ac0.404686 km²
250 ac1.011714 km²
500 ac2.023428 km²
1000 ac4.046856 km²
Reverse: Square Kilometer to Acre

Other acre conversions

Convert to square kilometer from another unit

ac to km² — frequently asked

How many square kilometers are in 1 acre?

1 acre = 0.004047 square kilometers (ac × 0.004047 = km²).

What is the formula to convert acre to square kilometer?

Multiply your acre value by 0.00404686 to get square kilometer.

How do I convert 10 acres to square kilometers?

10 ac = 0.040469 km². For 100 ac the answer is 0.404686 km². Use the calculator on this page for any other value.

See all area converters