Lat Long to UTM Converter
Free online Lat Long to UTM converter. Convert GPS coordinates (latitude/longitude) to Universal Transverse Mercator coordinates instantly using WGS84. Get UTM zone, easting, northing, hemisphere, and grid zone designator in meters.
About This Calculator
The Lat Long to UTM Converter instantly transforms GPS coordinates (latitude and longitude in decimal degrees) into Universal Transverse Mercator (UTM) coordinates using the WGS84 ellipsoid. Whether you are a surveyor, GIS analyst, geographer, hiker, or emergency response professional, this free online tool makes coordinate conversion effortless and accurate.
UTM divides the Earth into 60 zones, each 6° of longitude wide, with the central meridian minimizing distortion within each zone. Easting is measured in meters from a false origin of 500,000 m west of the central meridian, while northing is measured from the equator in the northern hemisphere and from 10,000,000 m south of the equator in the southern hemisphere. The converter also reports the latitude band letter (C through X) and the full grid zone designator used in the Military Grid Reference System (MGRS).
The calculator validates that latitude is between 80°S and 84°N (the valid UTM range) and longitude is between 180°W and 180°E. Results include the UTM zone number (1-60), hemisphere (N/S), easting and northing in meters rounded to the nearest meter, the latitude band letter, the grid zone designator (e.g., "18T"), and the full UTM coordinate string.
Regional Notes
United States (US): The contiguous US spans UTM zones 10 through 19. USGS topo maps commonly display UTM coordinates alongside latitude/longitude. The White House (Washington DC) is in zone 18S.
United Kingdom (UK): Great Britain spans zones 29V (west) and 30U (east). The Prime Meridian at Greenwich marks the boundary between UTM zones 30 and 31. Ordnance Survey uses a different grid system (OSGB36) but UTM is used for international mapping.
India (IN): India spans UTM zones 42N through 47N. New Delhi is in zone 43R (approx easting 710,000 m, northing 3,170,000 m). The Survey of India uses UTM for large-scale mapping projects.
Frequently Asked Questions
What is UTM and how does it differ from latitude/longitude?
UTM (Universal Transverse Mercator) is a grid-based mapping system that divides the Earth into 60 zones, each 6° wide. Unlike latitude/longitude which uses angular degrees, UTM uses meters as its unit, making distance calculations much simpler. UTM is widely used in surveying, GIS, military mapping, and emergency response.
How do you convert latitude and longitude to UTM coordinates?
Enter the latitude (between -80 and 84) and longitude (between -180 and 180) in decimal degrees. Enter positive values for north/east and negative for south/west. The converter calculates the UTM zone from the longitude, then applies the transverse Mercator projection formulas using the WGS84 ellipsoid to compute easting and northing in meters.
What is a UTM zone number?
A UTM zone is one of 60 longitudinal divisions of the Earth, each 6° wide. Zone 1 starts at 180°W and zones increase eastward. Zone 31 covers the Prime Meridian at Greenwich (0°). Each zone has its own central meridian where distortion is minimized, with easting values measured from 500,000 meters west of this meridian.
What is the difference between easting and northing in UTM?
Easting is the distance in meters eastward from the central meridian of a UTM zone, measured from a false origin 500,000 meters west of the central meridian to avoid negative values. Northing is the distance northward from the equator (in the northern hemisphere) or from 10,000,000 meters south of the equator (in the southern hemisphere).
Why does UTM only cover latitudes from 80°S to 84°N?
The transverse Mercator projection becomes highly distorted near the poles due to the Earth's curvature. UTM limits its coverage to 80°S to 84°N to maintain acceptable accuracy. For polar regions above 84°N or below 80°S, the Universal Polar Stereographic (UPS) coordinate system is used instead.
What is the grid zone designator (GZD) in UTM?
A grid zone designator (GZD) combines the UTM zone number with a latitude band letter, such as '18T' for New York City. There are 20 latitude bands lettered C through X (skipping I and O), each 8° tall except band X which spans 12° from 72°N to 84°N. The GZD is part of the Military Grid Reference System (MGRS).
Is this Lat Long to UTM converter free to use?
Yes, all calculators on Calculy are completely free to use with no hidden charges or registration required. The converter works on any device including desktop, tablet, and mobile.
What ellipsoid does the UTM converter use?
This converter uses the WGS84 (World Geodetic System 1984) ellipsoid, which is the standard reference for GPS and modern mapping applications. WGS84 parameters are: semi-major axis 6,378,137 m and flattening 1/298.257223563. This ensures compatibility with GPS devices, Google Maps, and most GIS software worldwide.