The Great Circle Distance Calculator

Enter latitude and longitude of points, select distance units and earth model and click "compute". Latitudes and longitudes may be entered in DD.DD, DD:MM.MM or DD:MM:SS.SS formats.

Input Data

Latitude 1		Longitude 1
	N S		W E
Latitude 2		Longitude 2
	N S		W E

Output

Course 1-2	Course 2-1	Distance

Distance Units: nm km sm Earth model: Spherical (1'=1nm) WGS84/NAD83/GRS80 Clarke (1866)/NAD27 International Krasovsky Bessel (1841) WGS72 WGS66 FAI sphere

Great Circle Distance Calculator JavaScript courtesy of Ed Williams.