Geo Distance

Compare surface and straight-line distance between two WGS-84 points. Enter coordinates as Lat/Lon, UTM, or MGRS — all are converted to geographic coordinates internally.

• Haversine — spherical great-circle estimate with R = 6371.0088 km.
• WGS-84 geodesic — ellipsoidal inverse solution calculated by GeographicLib; it remains defined for antipodal points.
• ECEF cylindrical — geocentric cylindrical coordinates (ρ, φ, z). Its distance is the same Euclidean chord shown in Cartesian coordinates, expressed in another coordinate system.
• Cartesian — ECEF (x, y, z) and direct chord distance through the Earth, not a surface route.

Bearings are undefined when both points are the same.