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Please enter lattitude and longitude in terms of decimal degrees. For example: 45.25 rather than 45 deg. 12 minutes.
Formula:
This calculator uses the Great Circle method
which treats the globe as a perfect sphere and allows the use of simple
trigonometric functions to calculate the arc-length.
This is not 100% accurate, but still provides a useful estimate.
X = 6378.7 * acos([sin(Lat1) * sin(Lat2)] + [cos(Lat1) * cos(Lat2) * cos{abs(Long2 - Long1)}])
Where X is the distance between the two entered points expressed in kilometers;
and Lat1, Long1 and Lat2, Long2 are the coordinates of the two points
converted into radians.
X is then multiplied by 1/1.609344 to render the result in miles. |
