Free online converter from acres to square kilometers. Type a value to get an instant result, check the formula and use the quick reference table below.
| acres (ac) | square kilometers (km²) |
|---|---|
| 1 | 0.00404686 |
| 2 | 0.00809371 |
| 5 | 0.0202343 |
| 10 | 0.0404686 |
| 20 | 0.0809371 |
| 50 | 0.202343 |
| 100 | 0.404686 |
| 250 | 1.01171 |
| 500 | 2.02343 |
| 1000 | 4.04686 |
1 ac = 0.00404686 km².
Multiply the value in acres by 0.00404686 to get square kilometers.