Free, no sign-up, runs in your browser. Convert WGS84 latitude and longitude to a UTM zone, easting and northing, or go the other way.
31U 452482.53 E 5411717.18 N
EPSG:32631
48.8566, 2.3522
Build a dotted map of the same area in the World in Dots editor. The editor is free to use and to export as PNG; SVG export is part of a paid plan.
Open the map editorThe Universal Transverse Mercator system splits the world into 60 north–south zones, each six degrees of longitude wide, and describes a position as a distance in metres inside a zone. The easting is the distance east of a zone's reference line, which is given a false value of 500,000 metres so it never goes negative. The northing is the distance from the equator, and in the southern hemisphere a false offset of 10,000,000 metres is added for the same reason.
For latitude and longitude to UTM, enter decimal degrees: negative latitude means south and negative longitude means west. The tool returns the zone with its latitude band letter, the easting and northing in metres, and the matching WGS84 EPSG code, which you can use in GIS software. For UTM to latitude and longitude, enter the zone number, choose the hemisphere, and give the easting and northing. You get decimal degrees and a GeoJSON point back.
Anything that is not a number, or is outside the valid range, shows a message under the inputs instead of a result. UTM is defined between 80°S and 84°N, so polar coordinates are rejected.
The converter uses the WGS84 datum, the same one GPS uses. Southwest Norway and the Svalbard archipelago use widened or merged zones, and the tool applies those exceptions. If your coordinates come from a different datum, such as NAD27, the results will be off by tens of metres. Values are rounded to two decimals, which is centimetre precision.