Geographical mile

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1 geographical mile =
International units
1855 m	1.855 km
1.855×10⁶ mm	18.55×10¹² Å
12.4×10⁻⁹ AU	196.074×10⁻¹⁵ ly
US customary / Imperial units
73.031×10³ in	6085.958 ft
2028.653 yd	1.153 mi

The geographical mile is a unit of length determined by 1 minute of arc along the Earth's equator, approximately equal to 1855 metres (6087.15 international feet).

The unit is not used much; it is closely related to the nautical mile, which was originally determined as 1 minute of arc along a great circle of the Earth and is nowadays defined to be exactly 1852 metres.

The Danish and German geographical mile (mil and Meile respectively) is 4 minutes of arc, and was defined as approximately 7421.5 metres by the astronomer Ole Rømer of Denmark. In Norway and Sweden, this 4 minute geographical mile was mainly used at sea (sjømil), up to the beginning of the 20th century.