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
| Acres | Square Kilometers |
|---|---|
| 1 ac | 0.0040469 km² |
| 5 ac | 0.020234 km² |
| 10 ac | 0.040469 km² |
| 25 ac | 0.10117 km² |
| 50 ac | 0.20234 km² |
| 100 ac | 0.40469 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.