Square kilometre

About Square kilometre

(Redirected from Km²)
'Square kilometre' (U.S. spelling: 'square kilometer'), symbol 'km²', is a decimal multiple of the SI unit of surface area, the square metre, one of the SI derived units.
1 km² is equal to:

★ the area of a square measuring 1 kilometre on each side

★ 1, 000, 000 (10⁶) m²

★ 100 hectares (ha)

★ 0.386 102 square miles (statute)

★ 247.105 381 acres
Conversely:

★ 1 m² = 0.000 001 (10^-6) km²

★ 1 hectare = 0.01 (10^-2) km²

★ 1 square mile = 2.589 988 km²

★ 1 acre = 0.004 047 km², 40.47 ha or 4047 m²
Note: "km²" means (km)², square kilometre or kilometre squared, and not k(m²), kilo–square metre. For example, 3 km² is equal to 3
★ (1,000 m)² = 3,000,000 m², not 3,000 m².

Comparative order

The 10⁶ m² orders of magnitude page gives comparisons with geographic areas.
A hectare (10⁴ m²) is less than a 'square kilometre' which is less than a square megametre (10¹² m²).

★ Conversion of units. ★ SI prefix for the precise meaning of the prefix "k"		★ Square Kilometre Array, a proposed radio telescope which is intended to have a collecting area of approximately one square kilometre.

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