Acre to Square Kilometer (ac to km²)
Convert ac to km² — Area converter
Also written as ac to km2.
One acre equals 0.0040468564 km², so to convert acres to square kilometers you multiply the value by 0.0040468564. A acre is smaller than a square kilometer — going the other way, 1 km² = 247.105381 ac. For example, 10 ac = 0.04046856 km² and 50 ac = 0.20234282 km².
1 ac = 0.0040468564 km²
Acre to Square Kilometer formula
1 Acre = 0.0040468564 km²
Worked examples
- 25 ac = 0.10117141 km²
- 100 ac = 0.40468564 km²
Acre to Square Kilometer conversion table
| Acre (ac) | Square Kilometer (km²) |
|---|---|
| 1 | 0.0040468564 |
| 2 | 0.0080937128 |
| 3 | 0.01214057 |
| 5 | 0.02023428 |
| 8 | 0.03237485 |
| 10 | 0.04046856 |
| 12 | 0.04856228 |
| 15 | 0.06070285 |
| 20 | 0.08093713 |
| 25 | 0.10117141 |
| 50 | 0.20234282 |
| 100 | 0.40468564 |
| 250 | 1.011714 |
| 500 | 2.023428 |
| 1000 | 4.046856 |
Frequently asked questions
How many square kilometers are in one acre?
One acre equals 0.0040468564 square kilometers (km²).
How many acres are in one square kilometer?
One square kilometer equals 247.105381 acres (ac).
How do you convert acres to square kilometers?
1 Acre = 0.0040468564 km². Use the calculator above for any value.
What is 5 ac in km²?
5 ac = 0.02023428 km².
What is 100 ac in km²?
100 ac = 0.40468564 km².
What is 10 ac in km²?
10 ac = 0.04046856 km².
What is 20 ac in km²?
20 ac = 0.08093713 km².
Is a acre bigger than a square kilometer?
No. A acre is smaller — one acre equals 0.0040468564 square kilometers, while one square kilometer equals 247.105381 acres.