UTM Scale Factor Calculator for Southern Hemisphere.

Enter UTM coordinates + orthometric height (H), ellipsoidal height is computed approximately.

Zone (54 to 56)

Easting (m)

Northing (m)

Orthometric Ht (m)

e.g. AHD / MSL

How the geoid is handled:
Ellipsoidal height h = Orthometric Height (H) + Geoid Separation (N)
N value is calculated approximately as a best fit plane and is good for about 1ppm.

GRS80 ellipsoid , UTM k0 = 0.9996
All calculations client-side , accurate to < 5 ppm inside any zone