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.
The square foot is a unit of area commonly used in the United States and some parts of Canada to measure spaces such as real estate, architecture, and interior design. One interesting fact about the square foot is that it originated from the Roman “pes,” or foot, which in ancient times was roughly 11.65 inches but has evolved into the standardized 12-inch foot we know today. The Roman builders’ influence is still evident as the technology advanced, yet the measurement conventions from thousands of years ago persist.
A square foot can tell fascinating stories about the world around you; for example, did you know that the average human adult has around 20 square feet of skin? Or that the Guinness World Record for the largest pizza ever baked covered an astounding 13,580 square feet? These unique perspectives add intriguing dimensions to our understanding of space, showcasing just how versatile and historically rich this seemingly simple unit of measure can be.
| Square Kilometers | Square Feet |
|---|---|
0
km²
|
0
ft²
|
0.1
km²
|
1076390
ft²
|
0.2
km²
|
2152780
ft²
|
0.3
km²
|
3229170
ft²
|
0.4
km²
|
4305560
ft²
|
0.5
km²
|
5381950
ft²
|
0.6
km²
|
6458340
ft²
|
0.7
km²
|
7534730
ft²
|
0.8
km²
|
8611120
ft²
|
0.9
km²
|
9687510
ft²
|
1
km²
|
1.07639e+7
ft²
|
1.1
km²
|
1.18403e+7
ft²
|
1.2
km²
|
1.29167e+7
ft²
|
1.3
km²
|
1.39931e+7
ft²
|
1.4
km²
|
1.50695e+7
ft²
|
1.5
km²
|
1.61459e+7
ft²
|
1.6
km²
|
1.72222e+7
ft²
|
1.7
km²
|
1.82986e+7
ft²
|
1.8
km²
|
1.9375e+7
ft²
|
1.9
km²
|
2.04514e+7
ft²
|
2
km²
|
2.15278e+7
ft²
|
2.1
km²
|
2.26042e+7
ft²
|
2.2
km²
|
2.36806e+7
ft²
|
2.3
km²
|
2.4757e+7
ft²
|
2.4
km²
|
2.58334e+7
ft²
|
2.5
km²
|
2.69098e+7
ft²
|
2.6
km²
|
2.79861e+7
ft²
|
2.7
km²
|
2.90625e+7
ft²
|
2.8
km²
|
3.01389e+7
ft²
|
2.9
km²
|
3.12153e+7
ft²
|
3
km²
|
3.22917e+7
ft²
|
3.1
km²
|
3.33681e+7
ft²
|
3.2
km²
|
3.44445e+7
ft²
|
3.3
km²
|
3.55209e+7
ft²
|
3.4
km²
|
3.65973e+7
ft²
|
3.5
km²
|
3.76737e+7
ft²
|
3.6
km²
|
3.875e+7
ft²
|
3.7
km²
|
3.98264e+7
ft²
|
3.8
km²
|
4.09028e+7
ft²
|
3.9
km²
|
4.19792e+7
ft²
|
4
km²
|
4.30556e+7
ft²
|
4.1
km²
|
4.4132e+7
ft²
|
4.2
km²
|
4.52084e+7
ft²
|
4.3
km²
|
4.62848e+7
ft²
|
4.4
km²
|
4.73612e+7
ft²
|
4.5
km²
|
4.84376e+7
ft²
|
4.6
km²
|
4.95139e+7
ft²
|
4.7
km²
|
5.05903e+7
ft²
|
4.8
km²
|
5.16667e+7
ft²
|
4.9
km²
|
5.27431e+7
ft²
|
5
km²
|
5.38195e+7
ft²
|
5.1
km²
|
5.48959e+7
ft²
|
5.2
km²
|
5.59723e+7
ft²
|
5.3
km²
|
5.70487e+7
ft²
|
5.4
km²
|
5.81251e+7
ft²
|
5.5
km²
|
5.92015e+7
ft²
|
5.6
km²
|
6.02778e+7
ft²
|
5.7
km²
|
6.13542e+7
ft²
|
5.8
km²
|
6.24306e+7
ft²
|
5.9
km²
|
6.3507e+7
ft²
|
6
km²
|
6.45834e+7
ft²
|
6.1
km²
|
6.56598e+7
ft²
|
6.2
km²
|
6.67362e+7
ft²
|
6.3
km²
|
6.78126e+7
ft²
|
6.4
km²
|
6.8889e+7
ft²
|
6.5
km²
|
6.99654e+7
ft²
|
6.6
km²
|
7.10417e+7
ft²
|
6.7
km²
|
7.21181e+7
ft²
|
6.8
km²
|
7.31945e+7
ft²
|
6.9
km²
|
7.42709e+7
ft²
|
7
km²
|
7.53473e+7
ft²
|
7.1
km²
|
7.64237e+7
ft²
|
7.2
km²
|
7.75001e+7
ft²
|
7.3
km²
|
7.85765e+7
ft²
|
7.4
km²
|
7.96529e+7
ft²
|
7.5
km²
|
8.07293e+7
ft²
|
7.6
km²
|
8.18056e+7
ft²
|
7.7
km²
|
8.2882e+7
ft²
|
7.8
km²
|
8.39584e+7
ft²
|
7.9
km²
|
8.50348e+7
ft²
|
8
km²
|
8.61112e+7
ft²
|
8.1
km²
|
8.71876e+7
ft²
|
8.2
km²
|
8.8264e+7
ft²
|
8.3
km²
|
8.93404e+7
ft²
|
8.4
km²
|
9.04168e+7
ft²
|
8.5
km²
|
9.14932e+7
ft²
|
8.6
km²
|
9.25695e+7
ft²
|
8.7
km²
|
9.36459e+7
ft²
|
8.8
km²
|
9.47223e+7
ft²
|
8.9
km²
|
9.57987e+7
ft²
|
9
km²
|
9.68751e+7
ft²
|
9.1
km²
|
9.79515e+7
ft²
|
9.2
km²
|
9.90279e+7
ft²
|
9.3
km²
|
1.00104e+8
ft²
|
9.4
km²
|
1.01181e+8
ft²
|
9.5
km²
|
1.02257e+8
ft²
|
9.6
km²
|
1.03333e+8
ft²
|
9.7
km²
|
1.0441e+8
ft²
|
9.8
km²
|
1.05486e+8
ft²
|
9.9
km²
|
1.06563e+8
ft²
|
10
km²
|
1.07639e+8
ft²
|
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