1 E+6 m²

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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

[edit] Notes

SI derived unit square metre, from base unit metre				Orders of magnitude for area							Conversion of units for area
1 E-30 m² = 1 fm²	1 E-24 m² = 1 pm²	1 E-18 m² = 1 nm²	1 E-12 m² = 1 µm²	1 E-6 m² = 1 mm²			1 E0 m² = 1 m²			1 E+6 m² = 1 km²	1 E+12 m² = 1 Mm²	1 E+18 m² = 1 Gm²	1 E+24 m² = 1 Tm²	1 E+30 m² = 1 Pm²
10 fm²	10 pm²	10 nm²	10 µm²	10 mm²			10 m²			10 km²	10 Mm²	10 Gm²	10 Tm²	1 E+36 m² = 1 Em²
100 fm²	100 pm²	100 nm²	100 µm²	100 mm²	=	1 cm²	100 m²	=	1 dam² aka a	100 km²	100 Mm²	100 Gm²	100 Tm²	1 E+40 m²
1,000 fm²	1,000 pm²	1,000 nm²	1,000 µm²	1,000 mm²	=	10 cm²	1,000 m²	=	10 dam² aka a	1,000 km²	1,000 Mm²	1,000 Gm²	1,000 Tm²	1 E+41 m²
10,000 fm²	10,000 pm²	10,000 nm²	10,000 µm²	10,000 mm²	=	1 dm²	10,000 m²	=	1 hm² aka ha	10,000 km²	10,000 Mm²	10,000 Gm²	10,000 Tm²	1 E+42 m² = 1 Zm²
100,000 fm²	100,000 pm²	100,000 nm²	100,000 µm²	100,000 mm²	=	10 dm²	100,000 m²	=	10 hm² aka ha	100,000 km²	100,000 Mm²	100,000 Gm²	100,000 Tm²	1 E+48 m² = 1 Ym²