9,161,923 sq km
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The land mass of the US has an area of 9,161,922 square kilometers.
The 50 states of the US measure a total of 3,794,066 square miles, or 9,826,630 km²
1140000
US estimates suggest that 4.7 square miles of Hiroshima were destroyed.
United States - 3,794,101 square miles.