Distance between Rome, Italy and Portsmouth, New Hampshire, USA
6533 km = 4060 miles
We assume a spherical Earth as a close approximation of the true shape of the Earth (an oblate spheroid). The distance is calculated as great-circle or orthodromic distance between city centres on the surface of a sphere.
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Rome, Italy
Country: ItalyRome’s coordinates: 41°53′30″ N, 12°30′40″ E
Population: 2,318,895
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Wikipedia article: Rome
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Portsmouth, USA
Country: USAState: New Hampshire
Portsmouth’s coordinates: 43°04′18″ N, 70°45′45″ W
Population: 20,779
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Wikipedia article: Portsmouth
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