What datum does this converter use?

All calculations use the WGS84 ellipsoid (semi-major axis 6,378,137 m, flattening 1/298.257223563), which is the standard datum for GPS and most modern mapping.

UTM divides the Earth into 60 vertical zones, each 6° of longitude wide, numbered 1 to 60 from west to east starting at 180° W. Easting and northing are measured in meters within each zone.

How accurate is the conversion?

The implementation uses the full WGS84 Transverse Mercator series expansion. Accuracy is sub-millimeter in the interior of a zone and degrades slightly near zone boundaries, which is well within practical GPS accuracy.

What are valid easting and northing ranges?

Easting should be between 100,000 m and 900,000 m (false easting 500,000 m is the central meridian). Northing ranges from 0 to ~9,300,000 m for the Northern hemisphere and from ~1,100,000 to 10,000,000 m for the Southern hemisphere (false northing 10,000,000 m applied for S).

Can I convert lat/long back to UTM?

This tool converts UTM → lat/long only. For the reverse direction (lat/long → UTM), use a dedicated Lat/Long to UTM converter.

Why do I get a slightly different result in other tools?

Minor differences (< 1 m) can arise from different series truncation depths or rounding strategies. Results from this tool agree with established geodesy references to sub-centimeter precision.

UTM to Lat/Long Converter

Name: UTM to Lat/Long Converter
Availability: InStock
Author: Nham Vu

Enter a UTM zone, easting, and northing to instantly get the equivalent WGS84 latitude and longitude.

UTM Coordinates

Zone Number

Hemisphere

Easting (meters)

Valid range: 100,000 – 900,000 m

Northing (meters)

Valid range: 0 – 10,000,000 m

Quick Examples

Enter UTM coordinates and click Convert to see the result.

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Summary

Enter a UTM zone, easting, and northing to instantly get the equivalent WGS84 latitude and longitude.

How it works

Enter the UTM zone number (1–60) and select the hemisphere (North or South).
Type the easting value in meters (typically 100,000 – 900,000).
Type the northing value in meters (0 – 10,000,000).
Click Convert to calculate latitude and longitude using the WGS84 Transverse Mercator formula.
Copy the result in decimal degrees or view it in degrees-minutes-seconds format.

Use cases

Convert survey or field GPS data from UTM to lat/long for mapping software.
Cross-check coordinates read from topographic maps that use UTM grids.
Import UTM waypoints into Google Maps or other web mapping tools.
Validate UTM coordinates produced by GIS pipelines.
Convert military grid reference coordinates for analysis.
Education: understand the relationship between projected and geographic coordinate systems.

Frequently Asked Questions

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Last updated: 2026-05-29 · Reviewed by Nham Vu