1 E6 m²
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The Kensington Gardens in London are 1 km².

To aid in the comparison of sizes of different geographic regions, areas between 1 km² (100 hectares) and 10 km² (1000 hectares) are listed below. See also areas of other orders of magnitude.

• Areas smaller than 1 km²
• 1 square kilometre (U.S. spelling: square kilometer), symbol km², is an SI unit of surface area. It is one of the SI derived units. It is equal to:
  • 100 hectares
  • 1 E+6 m² or 10⁶ m² in scientific notation
  • 1,000,000 m²
  • 0.386 square miles
  • 247.105381 acres
  • the area of a square of side length 1 km
  • a cube with this surface area has sides of length 408 m
  • a circle of this area has a radius of 564 m
  • a sphere of this surface area has a radius of 282 m
• 135 hectares—the campus of the United States Naval Academy
• 179 hectares—Bennebroek, smallest municipality in the Netherlands
• 195 hectares—Monaco (country ranked 192^nd by area)
• 200 hectares—Herm, Channel Islands
• 250 hectares—Hyde Park and Kensington Gardens in London
• 290 hectares—City of London
• 320 hectares—Hampstead Heath in London
• 341 hectares—Central Park in New York
• 400 hectares—Great Wall of China, largest human structure.
• 460 hectares—Pitcairn Island
• 493 hectares—University of the Philippines, Diliman
• 515 hectares—Falls Church, Virginia, the smallest county-level political subdivision in the United States by area.
• 650 hectares—Gibraltar
• 890 hectares—size of largest organism on Earth, Armillaria ostoyae. ^[1]
• Areas larger than 10 km²

Notes