# Square metre

(Redirected from Square kilometer)

A square metre (US spelling: square meter) is by definition the area enclosed by a square with sides each 1 metre long. It is the SI unit of area. It is abbreviated .

A square metre is equal to:

## Square kilometre

1 km² is equal to:

Conversely:

• 1 m² = 0.000 001 km²
• 1 hectare = 0.01 km²
• 1 square mile = 2.589 988 km²
• 1 acre = 0.004 047 km²

Note: "km²" means square kilometre and not kilosquare metre. For example, 3 km² is equal to 3 000 000 m² and not to 3000 m².

## Square megametre

Square megametres are not widely used; however, there are a number of "megametre fans" who think that this unit is very convenient for measuring oceans and continents.

1 Mm² is equal to:

• the area of a square measuring 1 megametre on each side
• 1 000 000 000 000 m²
• 100 000 000 hectares
• 1 000 000 km²
• 1 Mm² is the area of Egypt
• The area of Africa is 30.2 Mm²
• The total area of the Moon's surface is 38 Mm²
• The total area of dry land on Earth is 149.8 Mm²
• The area of the Pacific Ocean is 179.7 Mm²
• The total area of the Earth's surface is 510 Mm²

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