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# Planets - Calculate Surface Areas

Calculator for the approximate surface areas of Sun, Moon, Earth and the planets in square kilometers, square miles and compared to each other. The common unit for large surface areas is square kilometers, km². Of those, Earth has more than 500 million, whereas the Sun has more than 6 trillion.

Round to decimal places.Please enter one value, the other values will be calculated.

Example: Moon has more than twice the surface area of Pluto, but only half of that of Mercury.

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