How many acres are in 1 square kilometer?

1 square kilometer equals 247.105 ac.

How do I convert acres back to square kilometers?

Use the reverse converter: 1 acre equals 0.00404686 km².

Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.

To convert square kilometers to acres, multiply the value by 247.105381.

ac = km² × 247.105381

40 km² × 247.105381 = 9884.22 ac

Square Kilometer (km²): Used for the area of countries, cities and lakes. Equal to one million square metres.
Acre (ac): Used for land area in the US and UK. Exactly 4,046.8564224 square metres, historically a day's ploughing for a yoke of oxen.

How do I convert square kilometers to acres?: To convert square kilometers to acres, multiply the value by 247.105381.
How many acres are in 1 square kilometer?: 1 square kilometer equals 247.105 ac.
How many acres are in 10 square kilometers?: 10 km² equals 2471.05 ac.
How do I convert acres back to square kilometers?: Use the reverse converter: 1 acre equals 0.00404686 km².
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.