UTM Coordinate Converter

How to use

1. 1Pick Lat / Lon to UTM to project a decimal-degree position onto the UTM grid, or UTM to Lat / Lon for the reverse.
2. 2For the forward path, enter latitude (positive north, negative south) and longitude (positive east, negative west). Use a comma or period as the decimal mark.
3. 3Read the result card: zone and letter, hemisphere, easting in meters, northing in meters, plus point scale factor and meridian convergence.
4. 4For the inverse path, enter the zone (1 to 60), an optional zone letter (C to X) or a hemisphere choice (N or S), then easting and northing in meters.
5. 5Use the precision selectors at the top to control how many decimal places appear for lat/lon and for meter values, and Copy buttons to lift any field straight into a spreadsheet or GIS form.
6. 6Click any sample landmark to load a worked example, including a Svalbard sample that exercises the zone exception inside band X.

About this tool

UTM Coordinate Converter projects WGS84 latitude and longitude onto the Universal Transverse Mercator grid, and runs the inverse projection from UTM back to lat/lon. UTM divides the globe between 80 degrees south and 84 degrees north into 60 zones, each six degrees of longitude wide and projected separately as a transverse Mercator with a central scale factor of 0.9996. The math here uses the standard Snyder series (USGS Professional Paper 1395) on the WGS84 ellipsoid (a equal to 6 378 137 m, 1/f equal to 298.257 223 563), the same datum Google Maps, OpenStreetMap, and consumer GPS receivers use. The forward path reports the zone number, the zone letter (C through X, skipping I and O), the hemisphere, easting and northing in meters, the central meridian for the zone, the point scale factor, and the meridian convergence angle so surveyors can align grid north with true north. It also applies the two non-standard zoning rules: southern Norway uses zone 32 between 3 and 12 degrees east in latitude band V, and the Svalbard archipelago uses zones 31, 33, 35, and 37 inside band X so the islands are not split awkwardly. The inverse path accepts either a zone letter or an explicit hemisphere choice plus easting and northing, then returns the corresponding latitude and longitude in decimal degrees. Both directions run entirely in the browser; the coordinates you type here never leave the page.

Free to use. Works in your browser. No signup, no login.