Convert Acres (ac) to Square Kilometers (km²)
Enter a value below to convert Acres (ac) to Square Kilometers (km²).
Conversion:
1 Acres (ac) = 0.0040468564224 Square Kilometers (km²)
How to Convert Acres (ac) to Square Kilometers (km²)
1 ac = 0.0040468564224 km2
1 km2 = 247.10538147 ac
Example: convert 15 Acres (ac) to Square Kilometers (km²):
25 ac = 0.10117141056 km2
Acres (ac) to Square Kilometers (km²) Conversion Table
| Acres (ac) | Square Kilometers (km²) |
|---|---|
| 0.01 ac | 0.000040468564224 km2 |
| 0.1 ac | 0.00040468564224 km2 |
| 1 ac | 0.0040468564224 km2 |
| 2 ac | 0.0080937128448 km2 |
| 3 ac | 0.012140569267 km2 |
| 5 ac | 0.020234282112 km2 |
| 10 ac | 0.040468564224 km2 |
| 20 ac | 0.080937128448 km2 |
| 50 ac | 0.20234282112 km2 |
| 100 ac | 0.40468564224 km2 |
| 1000 ac | 4.0468564224 km2 |
Acres (ac)
Definition
An acre (ac) is an imperial unit of area equal to 43,560 square feet, 4,840 square yards, or approximately 4,046.86 square meters (about 0.4047 hectares).
History
The acre originated in medieval England as the amount of land a yoke of oxen could plow in one day. It was later standardized and remains one of the most recognizable land measurement units in English-speaking countries.
Current use
Acres are widely used for measuring land in the United States, the United Kingdom, Canada, and other countries with historical ties to the British imperial system. Real estate, farming, and forestry commonly reference acres.
Square Kilometers (km²)
Definition
A square kilometer (km²) is a metric unit of area equal to 1,000,000 square meters or 100 hectares. It represents the area of a square with sides of 1 kilometer.
History
The square kilometer naturally followed the adoption of the metric system and the kilometer as a standard unit of distance. It became the standard large-scale area unit for geography, demographics, and national statistics.
Current use
Square kilometers are used worldwide to express the area of cities, regions, countries, lakes, and large geographic features. It is the standard unit in national census data and geopolitical comparisons.