Distance between Rome, Italy and Boulder, Colorado, USA
8971 km = 5574 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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Boulder, USA
Country: USAState: Colorado
Boulder’s coordinates: 40°00′53″ N, 105°16′13″ W
Population: 97,385
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Wikipedia article: Boulder
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