Use the calculator above to convert Acres (ac) to Square Kilometers (km²) instantly, or check the reference table and answers below. 1 Acre equals 0.004047 km².
To convert Acres to Square Kilometers, multiply the Acres value by 0.004047. To go the other way, divide by 0.004047 instead.
How many Square Kilometers are in 1 Acre?
1 Acre (ac) equals 0.004047 km².
How many Square Kilometers are in 10 Acres?
10 Acres (ac) equals 0.040469 km².
Symbol: ac
An acre is a unit of land area used in the imperial and US customary systems, historically defined as the area a yoke of oxen could plough in a day. It's commonly used for land and real estate.
Symbol: km²
A square kilometer (km²) is a metric unit of area equal to one million square meters, used for large areas like cities and countries.
| Acres [ac] | Square Kilometers [km²] |
|---|---|
| 0.01 ac | 0.000040 km² |
| 0.1 ac | 0.000405 km² |
| 1 ac | 0.004047 km² |
| 2 ac | 0.008094 km² |
| 3 ac | 0.012141 km² |
| 5 ac | 0.020234 km² |
| 10 ac | 0.040469 km² |
| 20 ac | 0.080937 km² |
| 50 ac | 0.202343 km² |
| 100 ac | 0.404686 km² |
| 1000 ac | 4.046863 km² |