Haversine distance between two lat/lng points.
Decimal degrees. Great-circle distance via the haversine formula (mean Earth radius 6371.0088 km).
Haversine assumes a sphere; real ellipsoidal distances can differ by up to ~0.5%.
One point per box as "lat, lng" (decimal or DMS). Legs are measured between consecutive points.
Enter two or more points to see each leg and the total route length.