Cubic kilometre is metric volume unit, symbol: [km³]. Definition of 1 cubic kilometre = 1 km × 1 km × 1 km. One cubic kilometre is very large volume. For example Caspian Sea has water volume of 78,200 km³. Compared to cubic-metre, cubic kilometre is bigger unit.
• 1 [km³] = (exactly) `1000000000` [m³]
• 1 [m³] = (exactly) `1/(1000000000)` [km³] = 1.0 × 10-9 [km³]
Multiply convert of cubic kilometre to common volume units:[km³]
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See also: kilometre length unit. http://conversion.org/length/k...