Distance and Azimuth Between Two Points
Compute great-circle distance and bearing from two latitude and longitude points.
Input
Enter the latitude and longitude of two points to compute the great-circle distance and bearing.
Point 1
deg
deg
Point 2
deg
deg
Enter latitude from -90 to 90 degrees and longitude from -180 to 180 degrees.
Result
Great-circle distance
403.05832km
About 403,058.31957 m
Initial bearing
255.575508 deg
West
Final bearing
253.113096 deg
West
Values use the haversine formula with an Earth radius of 6371 km. Bearings are measured clockwise from true north as 0 degrees.
How it works
- The Earth is modeled as a sphere with a radius of 6371 km, and the haversine formula gives the shortest path (great-circle distance) between the two points.
- The initial bearing is the direction from point 1 toward point 2, and the final bearing is the heading on arrival at point 2; both are measured clockwise from true north as 0 degrees.
- Enter latitude in the range -90 to 90 degrees and longitude in the range -180 to 180 degrees.
- Because the real Earth is an ellipsoid, long distances may differ slightly from an ellipsoidal model.
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Distance and Azimuth Between Two Points