Acre to Square Kilometer Converter
Convert acre to square kilometer instantly.
Standard area units
Fun comparisons
How to convert acre to square kilometer
Enter your area in acre and get the equivalent in square kilometer instantly. The converter includes real-world comparisons - like football fields and tennis courts - to help you visualize the space.
Acres are used in the US and UK for land measurement; square kilometers are the metric equivalent used in most other countries. One acre equals approximately 0.00405 square kilometers.
Need the opposite direction? Convert square kilometer to acre just as easily, or explore all our area conversions.
Common acre to square kilometer conversions
| Acre (ac) | Square Kilometer (km²) |
|---|---|
| 1 | 0.00404686 |
| 5 | 0.0202343 |
| 10 | 0.0404686 |
| 25 | 0.101171 |
| 50 | 0.202343 |
| 100 | 0.404686 |
| 500 | 2.02343 |
| 1000 | 4.04686 |
Frequently asked questions
1 acre equals 0.00404686 square kilometer.
Multiply by 0.00404686. For example, 5 ac = 0.0202343 km².
1000 acres equals approximately 4.047 square kilometers.
1 square kilometer equals 247.105 acre.
100 acre equals 0.404686 square kilometer.