Different tools speak different coordinate dialects: a phone gives you decimal degrees, a marine chart wants DDM, a survey uses UTM, and a military map uses MGRS. This formatter takes one WGS84 point and renders it in all of them at once.
How it works
Decimal degrees, DMS, and DDM are simple arithmetic reshufflings of the same number. UTM is a real map projection: the tool runs the standard Transverse Mercator series expansion on the WGS84 ellipsoid, selects the 6-degree zone from the longitude, and outputs easting and northing in metres. MGRS layers a 100,000-metre square letter scheme on top of the UTM zone and band, then truncates to a chosen digit count. Geohash interleaves the bits of latitude and longitude and encodes them in base 32.
Notes and limits
UTM and MGRS are defined for latitudes between 80 degrees south and 84 degrees north; the polar caps use the separate UPS system, which is out of scope here, so very high-latitude inputs are flagged. The UTM and MGRS values use the WGS84 datum. Small rounding differences from other calculators are normal because the projection is a truncated series, but the results are accurate to well under a metre across the valid band.