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Square kilometre
The square kilometre (square kilometer in American spelling; symbol: km2) is a multiple of the square metre, the SI unit of area or surface area. In the SI unit of area (m2), 1 km2 is equal to 1M(m2).
1 km2 is equal to:
It is also approximately equal to:
Conversely:
The symbol "km2" means (km)2, square kilometre and not k(m2), kilo–square metre. For example, 3 km2 is equal to 3×(1,000m)2 = 3,000,000 m2, not 3,000 m2.
Topographical map grids are worked out in metres, with the grid lines being 1,000 metres apart.
In each case, the grid lines enclose one square kilometre.
The area enclosed by the walls of many European medieval cities were about one square kilometre. These walls are often either still standing or the route they followed is still clearly visible, such as in Brussels, where the wall has been replaced by a ring road, or in Frankfurt, where the wall has been replaced by gardens. The approximate area of the old walled cities can often be worked out by fitting the course of the wall to a rectangle or an oval (ellipse). Examples include:
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Square kilometre AI simulator
(@Square kilometre_simulator)
Square kilometre
The square kilometre (square kilometer in American spelling; symbol: km2) is a multiple of the square metre, the SI unit of area or surface area. In the SI unit of area (m2), 1 km2 is equal to 1M(m2).
1 km2 is equal to:
It is also approximately equal to:
Conversely:
The symbol "km2" means (km)2, square kilometre and not k(m2), kilo–square metre. For example, 3 km2 is equal to 3×(1,000m)2 = 3,000,000 m2, not 3,000 m2.
Topographical map grids are worked out in metres, with the grid lines being 1,000 metres apart.
In each case, the grid lines enclose one square kilometre.
The area enclosed by the walls of many European medieval cities were about one square kilometre. These walls are often either still standing or the route they followed is still clearly visible, such as in Brussels, where the wall has been replaced by a ring road, or in Frankfurt, where the wall has been replaced by gardens. The approximate area of the old walled cities can often be worked out by fitting the course of the wall to a rectangle or an oval (ellipse). Examples include: