Enter decimal or DMS coordinates — GPSwitch converts to UTM zone, easting and northing in WGS84.
Paste your coordinates and convert to all 27 formats instantly.
Open GPSwitch ConverterUTM uses metres as its unit, making it ideal for measuring distances and areas on the ground. A difference of 1000 in easting equals exactly 1 km — something not true for decimal degrees, which vary in ground distance by latitude. GIS software, surveying instruments, and military maps routinely use UTM.
A UTM coordinate has three components:
Example for the Eiffel Tower: 31U 448251 5412678
GPSwitch assumes WGS84 input and produces WGS84 UTM output — the standard datum for GPS. If you are working with legacy data in NAD27 or ED50, apply a datum transformation before using this tool.
The UTM zone is calculated directly from the longitude: zone = floor((longitude + 180) / 6) + 1. The zone letter (latitude band) is determined from the latitude range. GPSwitch calculates both automatically.
The converter handles one coordinate at a time with instant display. For multiple conversions, use a free GPSwitch account — your history is stored and you can copy results individually.
MGRS (Military Grid Reference System) is built on top of UTM. MGRS adds a 100,000-metre square identifier and expresses the coordinate as a single compact string. UTM keeps easting and northing as separate metre values. GPSwitch converts to both simultaneously.
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