Free Web Tool

UTM ↔ Geographic

Convert between UTM and geographic (lat/lon) on WGS84 or PRS92 (Clarke 1866) ellipsoids with zone, grid convergence, and scale factor.

Inputs

Direction

Datum

Latitude (decimal °)

Longitude (decimal °)

Notes

WGS84 ellipsoid: a = 6378137, f = 1/298.257223563.
PRS92 uses Clarke 1866 (a = 6378206.4, f = 1/294.978698) — widely used in PH legacy data.
Standard UTM transverse Mercator with k₀ = 0.9996. Zones 6° wide.

Results

Zone (auto)—

Easting—

Northing—

Latitude—

Longitude—

Convergence γ—

Scale factor k—