Square kilometre is metric area unit, symbol: [km²]. Definition of 1 square kilometre = 1km x 1km. . Compared to square-metre, square kilometre is bigger unit.
• 1 [km²] = (exactly) `1000000` [m²]
• 1 [m²] = (exactly) `1/(1000000)` [km²] = 1.0 × 10-6 [km²]
Multiply convert of square kilometre to common area units:[km²]
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