Distance between two places (great circle)

Enter the latitude and longitude of two places to see the great-circle distance.

Works in metric or imperial units.

Learn great circles properly

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Questions students ask

Why do flight paths look curved?

The shortest route on a sphere is a great circle, which looks curved on a flat map.

What formula does it use?

Haversine formula on a sphere of radius 6371 km.

Free notes on great circles

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