Convert Acres to Square Kilometers
1 ac = 0.00404686 km²
Conversion Table
| acres (ac) | square kilometers (km²) |
|---|---|
| 0.5 | 0.00202343 |
| 1 | 0.00404686 |
| 2 | 0.00809372 |
| 5 | 0.0202343 |
| 10 | 0.0404686 |
| 25 | 0.101172 |
| 50 | 0.202343 |
| 100 | 0.404686 |
| 250 | 1.0117 |
| 500 | 2.0234 |
| 1000 | 4.0469 |
How to Convert acres to square kilometers
To convert acres to square kilometers, multiply the value by the conversion factor:
For example: 10 ac = 0.0404686 km²
About acres and square kilometers
The Conversion Formula
To convert acres to square kilometers, multiply the value by the conversion factor: 1 ac = 0.00404686 km². For a worked example, suppose you need to convert 25 ac to square kilometers: 25 × 0.00404686 = 0.101172 km². To convert in the opposite direction, divide by 0.00404686, or equivalently multiply by 247.11.
About acres
The acre's origins are agricultural: it was originally defined as the amount of land a yoke of oxen could plow in a single day. This 'furlong' (furrow long) by 'chain' definition standardized land ownership in medieval England. Today, the acre remains the king of land measurement in the US and UK. There are 640 acres in a square mile. acres are commonly used in US Farm land, Residential lots (US), Public parks (US/UK), and Golf courses, Deforestation stats (US media).
An American football field (including end zones) is about 1.32 acres.
About square kilometers
The square kilometer (km²) is the metric unit for measuring cities, countries, and vast natural reserves. Equal to one million square meters or 100 hectares, it is the standard for geography. For example, when you read about the deforestation of the Amazon or the size of a new national park, the figures are usually in square kilometers. square kilometers are commonly used in Country and city areas, Forest fires, Lakes and oceans, and Population density, National parks.
Central Park in NYC is about 3.4 square kilometers.
When Would You Convert acres to square kilometers?
Converting between acres and square kilometers is one of the most common area conversions. You might need this conversion when working with international specifications, following instructions written for a different measurement system, or comparing values across different standards. Having the conversion factor (1 ac = 0.00404686 km²) memorized or bookmarked can save time in professional and everyday contexts alike.