Convert between UTM (easting, northing, zone) and decimal degrees — both ways.
UTM (Universal Transverse Mercator) divides the world into 60 zones, each 6 degrees of longitude wide, and projects each zone onto a flat grid measured in metres. The result is a pair of numbers — easting and northing — that are easier to work with on paper and in the field than latitude and longitude, because distances between points are in metres, not in angular fractions.
The conversion from latitude and longitude to UTM involves the Transverse Mercator projection equations with the WGS84 ellipsoid parameters. It is not a simple formula — it is a series expansion that accounts for the Earth's shape — but it is deterministic and exact to the centimetre. This tool implements the standard equations used by surveying and mapping software.
UTM does not cover the polar regions (below 80°S or above 84°N); those areas use the UPS (Universal Polar Stereographic) projection instead. Everything here runs in your browser using the WGS84 ellipsoid.
Uses the Transverse Mercator projection with WGS84 ellipsoid (a = 6,378,137 m, f = 1/298.257223563). Scale factor k₀ = 0.9996. False easting = 500,000 m. False northing = 10,000,000 m in the southern hemisphere.
A 6-degree-wide strip of longitude. Zone 1 starts at 180°W, zone 23 covers most of south-eastern Brazil (48°W to 42°W). The zone number plus the hemisphere letter (N or S) identifies the strip.
To avoid negative numbers, the southern hemisphere adds a false northing of 10,000,000 m. A northing of 7,400,000 S means the point is 2,600 km south of the equator.
No — it is a different representation of the same point. Both are exact to the precision you carry. UTM is more convenient for measuring distances on a flat map because the units are metres.
No. The conversion is computed in your browser with the WGS84 ellipsoid equations.
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