acre (ac) → square kilometer (km²)
1 ac = 0.00405 km² · ⇄ square kilometer (km²) → acre (ac)
Enter a valid value for the selected unit
All units in this category
| Converted Value | ||
|---|---|---|
| square meter | m² | — |
| square kilometer | km² | — |
| square centimeter | cm² | — |
| square millimeter | mm² | — |
| hectare | ha | — |
| are | a | — |
| square inch | in² | — |
| square foot | ft² | — |
| square yard | yd² | — |
| square mile | mi² | — |
| acre | ac | — |
| rood | ro | — |
| dunam | dunam | — |
| tsubo | 坪 | — |
| Czech jitro | jitro | — |
| barn | b | — |
Conversion Formula & Definition
km² = ac × 0.00405
1 acre (ac) = 0.00405 square kilometer (km²).
Popular Conversions (Area)
Quick Conversion Reference Table: acre (ac) → square kilometer (km²)
| acre (ac) | square kilometer (km²) |
|---|---|
| 0.1 ac | 0.000405 km² |
| 0.5 ac | 0.00202 km² |
| 1 ac | 0.00405 km² |
| 2 ac | 0.00809 km² |
| 5 ac | 0.0202 km² |
| 10 ac | 0.0405 km² |
| 20 ac | 0.0809 km² |
| 50 ac | 0.202 km² |
| 100 ac | 0.405 km² |
| 250 ac | 1.01 km² |
| 500 ac | 2.02 km² |
| 1,000 ac | 4.05 km² |