To help compare sizes of different surface areas, we list here areas of the order of 10²¹ square metres, i.e. those between 1 quadrillion km² and 10 quadrillion km². See also areas of other orders of magnitude.

See also: Orders of magnitude

External link

Conversion Calculator for Units of AREA (http://www.ex.ac.uk/trol/scol/ccarea.htm)

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