• km²   ac
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Rounding Mode:

The square kilometer is primarily used to quantify large areas of land. Fascinatingly, even though the metric system is standardized almost universally, the square kilometer remains one of the most significant units for various aspects of geography and urban planning. To put it in perspective, consider that the entire area of New York City’s Central Park measures approximately 3.41 square kilometers, which speaks volumes about its massive size within an urban environment.

Moreover, the square kilometer helps highlight the vastness of some of the world’s largest countries and cities. For instance, Russia, the largest country in the world, spans roughly 17 million square kilometers, showcasing the immense diversity and expanse of land that one country can encompass. This unit exemplifies the intriguing contrasts and scales of spaces we interact with globally.

Did you know?

The acre, a unit of area commonly used in the United States and the United Kingdom, traces its origins back to the Middle Ages. Historically, it was defined as the amount of land that could be plowed by a yoke of oxen in one day. Today, one acre is standardized to be exactly 43,560 square feet. To put that into perspective, an acre is roughly the size of an American football field, minus the end zones.

Interestingly, the term “acre” is derived from the Old English word “æcer,” meaning open field. Though primarily used in agriculture and land measurement, the acre is still employed in real estate to describe large residential or commercial properties, reflecting its enduring utility in real-world applications.

> Kilometers² to Acres Conversion Table

Square Kilometers Acres
0 km² 0 ac
0.1 km² 24.71051 ac
0.2 km² 49.42103 ac
0.3 km² 74.13154 ac
0.4 km² 98.84206 ac
0.5 km² 123.55257 ac
0.6 km² 148.26309 ac
0.7 km² 172.9736 ac
0.8 km² 197.68411 ac
0.9 km² 222.39463 ac
1 km² 247.10514 ac
1.1 km² 271.81566 ac
1.2 km² 296.52617 ac
1.3 km² 321.23669 ac
1.4 km² 345.9472 ac
1.5 km² 370.65771 ac
1.6 km² 395.36823 ac
1.7 km² 420.07874 ac
1.8 km² 444.78926 ac
1.9 km² 469.49977 ac
2 km² 494.21028 ac
2.1 km² 518.9208 ac
2.2 km² 543.63131 ac
2.3 km² 568.34183 ac
2.4 km² 593.05234 ac
2.5 km² 617.76286 ac
2.6 km² 642.47337 ac
2.7 km² 667.18388 ac
2.8 km² 691.8944 ac
2.9 km² 716.60491 ac
3 km² 741.31543 ac
3.1 km² 766.02594 ac
3.2 km² 790.73646 ac
3.3 km² 815.44697 ac
3.4 km² 840.15748 ac
3.5 km² 864.868 ac
3.6 km² 889.57851 ac
3.7 km² 914.28903 ac
3.8 km² 939 ac
3.9 km² 963.71006 ac
4 km² 988.42057 ac
4.1 km² 1013.13108 ac
4.2 km² 1037.8416 ac
4.3 km² 1062.55211 ac
4.4 km² 1087.26263 ac
4.5 km² 1111.97314 ac
4.6 km² 1136.68365 ac
4.7 km² 1161.39417 ac
4.8 km² 1186.10468 ac
4.9 km² 1210.8152 ac
5 km² 1235.52571 ac
5.1 km² 1260.23623 ac
5.2 km² 1284.94674 ac
5.3 km² 1309.65725 ac
5.4 km² 1334.36777 ac
5.5 km² 1359.07828 ac
5.6 km² 1383.7888 ac
5.7 km² 1408.49931 ac
5.8 km² 1433.20983 ac
5.9 km² 1457.92034 ac
6 km² 1482.63085 ac
6.1 km² 1507.34137 ac
6.2 km² 1532.05188 ac
6.3 km² 1556.7624 ac
6.4 km² 1581.47291 ac
6.5 km² 1606.18343 ac
6.6 km² 1630.89394 ac
6.7 km² 1655.60445 ac
6.8 km² 1680.31497 ac
6.9 km² 1705.02548 ac
7 km² 1729.736 ac
7.1 km² 1754.44651 ac
7.2 km² 1779.15702 ac
7.3 km² 1803.86754 ac
7.4 km² 1828.57805 ac
7.5 km² 1853.28857 ac
7.6 km² 1878 ac
7.7 km² 1902.7096 ac
7.8 km² 1927.42011 ac
7.9 km² 1952.13062 ac
8 km² 1976.84114 ac
8.1 km² 2001.55165 ac
8.2 km² 2026.26217 ac
8.3 km² 2050.97268 ac
8.4 km² 2075.6832 ac
8.5 km² 2100.39371 ac
8.6 km² 2125.10422 ac
8.7 km² 2149.81474 ac
8.8 km² 2174.52525 ac
8.9 km² 2199.23577 ac
9 km² 2223.94628 ac
9.1 km² 2248.6568 ac
9.2 km² 2273.36731 ac
9.3 km² 2298.07782 ac
9.4 km² 2322.78834 ac
9.5 km² 2347.49885 ac
9.6 km² 2372.20937 ac
9.7 km² 2396.91988 ac
9.8 km² 2421.63039 ac
9.9 km² 2446.34091 ac
10 km² 2471.05142 ac