The Earth's surface area is about 196,940,400 square miles (510,072,000 km²), of which 29.2% or 57,506,000 square miles is land surface (148,940,000 km²)
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The earth's atmosphere comprises a volume of gases and that cannot be measured in square miles.
About one fifth of the earth's land is Tundra, as the Earth has about 57.5 million square miles (149 million sq kms) of land. This is around 11.5 million sq miles (29.8 million sq kms).
0.00005 square miles
179.5 square miles.
306.5 square miles