Lat Long Coordinate Converter (UTM, DMS)
Convert latitude/longitude between decimal degrees, DMS, and UTM northing/easting. Guidance covers UTM zones, MGRS, State Plane, and accuracy limits.
Supported conversions
Convert WGS84 latitude/longitude between decimal degrees, DMS, and UTM. Paste mode accepts decimal pairs, signed plus/minus pairs, compass DMS, UTM zone/easting/northing, and up to 25 batch rows. If the text looks like State Plane, the calculator stops and asks for a zone, datum, projection, and units instead of guessing.
This coordinate converter is designed for the most common lat long converter tasks: decimal degrees to degrees minutes seconds, degrees minutes seconds back to decimal degrees, and latitude/longitude to UTM zone, easting, and northing. It also accepts UTM-style zone, easting, and northing inputs so you can produce latitude and longitude for a map, GPS app, spreadsheet, or GIS handoff.
The important word is supported. Coordinate systems are not all interchangeable. UTM northing/easting values are different from State Plane northing/easting values, and MGRS grid references add extra grid-square rules on top of UTM. This page explains those systems so you can use the calculator for decimal degrees, DMS, and UTM work without assuming it performs MGRS or State Plane conversions that are not in the form.
Use the tool when you need to rewrite a location in a different notation, prepare coordinates for another app, check a field note, or make a quick UTM-to-latitude/longitude estimate. If your source value includes an MGRS square ID, a State Plane zone, a local construction grid, or a survey datum that is not WGS84-style latitude/longitude, identify those details before converting.
Latitude and longitude describe an angle on Earth. Latitude measures north or south of the equator, and longitude measures east or west of the prime meridian. A lat long converter usually changes how those two angles are written; it should not move the point itself.
Decimal degrees are compact and easy for computers to sort, filter, and calculate. A negative longitude usually means west, and a negative latitude usually means south. DMS is easier to read on some printed maps and navigation documents because it separates the angle into degrees, minutes, and seconds.
The most common lat-long mistake is order. Many consumer maps display latitude first and longitude second. Some GIS formats, GeoJSON coordinates, and database records use longitude first. A coordinate pair should always be labeled, especially when copied into a spreadsheet or shared in a work order. A correct conversion with the order swapped can place the point in the wrong country or ocean.
UTM stands for Universal Transverse Mercator. Instead of writing a location as angular latitude and longitude, UTM divides most of the world into 60 zones and describes a point with meter-based grid values. Easting measures how far east the point is inside its zone. Northing measures how far north the point is from the equator, with hemisphere-specific handling in full UTM records.
A search for northing easting to lat long often hides a key question: which northing and easting system produced the numbers? If the source is UTM, the zone is required. If the source is a State Plane, local, mine, utility, construction, or engineering grid, the same numbers can refer to a different place. Treat northing and easting as grid coordinates, not as a complete coordinate system by themselves.
The UTM fields in this calculator are best for practical WGS84-style UTM checks. For southern hemisphere coordinates, formal survey work, or points close to a UTM zone edge, verify the result in the source GIS or an official conversion tool before using it for navigation, property, utilities, or emergency response.
Northing and easting are useful because they behave like x and y distances on a map grid. That makes them convenient for field notes, CAD drawings, construction staking, and GIS layers. The tradeoff is that northing/easting values depend on the grid definition. A pair of numbers without the grid name is like a street address without the city.
If you have a UTM coordinate, use the calculator's UTM input fields. If your source says SPCS, State Plane, NAD83 StatePlane, EPSG with a state zone, or a county-specific grid, use a dedicated State Plane or GIS converter first. After that tool gives you latitude/longitude, you can use this page to convert the lat long into decimal degrees, DMS, or UTM for sharing.
MGRS, the Military Grid Reference System, is related to UTM but is not the same display format. A full MGRS reference includes a grid zone designator, a 100-kilometer square identifier, and a variable number of easting and northing digits. Those letters are not decoration; they identify the grid square used to interpret the numbers.
Because of that extra structure, a true lat long to MGRS conversion needs MGRS-specific parsing and validation. This calculator does not parse an MGRS string and does not output an MGRS grid reference. That is intentional. Returning a UTM value and labeling it MGRS would be misleading, especially for field navigation or emergency work.
If you have an MGRS value, use a dedicated MGRS converter or GIS tool to decode it into UTM or latitude/longitude. Once you have ordinary latitude and longitude, decimal degrees, DMS, or UTM zone/easting/ northing, this calculator can help you reformat the supported values.
State Plane Coordinate System values often look like northing and easting, but they are not UTM. State Plane is built from state or regional zones with projection parameters chosen for local accuracy. Depending on the zone, it may use Lambert Conformal Conic, Transverse Mercator, or another projection setup. The same-looking northing and easting values can mean different locations in different zones.
State Plane conversions also depend on datum and units. NAD27, NAD83, and newer realizations can shift coordinates. Feet-versus-meter assumptions can create large errors. For this reason, a generic coordinate converter should not claim to convert State Plane unless it asks for the exact zone, datum, and unit definition and uses verified projection parameters.
Use a State Plane or GIS converter when your source data mentions SPCS, StatePlane, a state zone, a county coordinate system, or an EPSG code tied to a local projection. Use this calculator after that step when you need to communicate the resulting latitude/longitude in decimal degrees, DMS, or UTM.
Coordinate conversion changes notation. It does not improve the original measurement. A phone GPS point, a hand-dropped map pin, a surveyed monument, and a digitized paper map can all be converted into the same formats, but they do not have the same accuracy. Keep the source accuracy with the result whenever the coordinate matters.
Datum is another common source of differences. WGS84 is common for GPS and web mapping, but local datasets may use NAD83, NAD27, ETRS89, or a project-specific frame. A datum shift can be larger than the rounding difference between decimal degrees and DMS. When comparing coordinates from two systems, check the datum before worrying about the last decimal place.
Rounding should match the job. A hiking note, classroom example, or travel itinerary does not need survey-grade precision. Utility, boundary, construction, and emergency-response work needs source verification, not just more decimal places. Extra digits can make an uncertain coordinate look more exact than it really is.
GPS lat long to DMS: A phone gives you 40.7128, -74.0060. Choose decimal degrees as the input format and DMS as the output format. The converted result is easier to place in a printed field sheet, but the point still represents the same New York City location.
Latitude/longitude to UTM: A GIS layer needs a UTM zone, easting, and northing. Enter the decimal latitude and longitude, choose UTM output, and keep the zone and hemisphere with the returned easting and northing. Do not share the easting and northing without the zone.
UTM northing/easting to lat long: A field notebook lists a UTM zone and meter-based grid values. Choose UTM as the input format and decimal degrees as the output format. If the notebook also includes a hemisphere, zone letter, datum, or EPSG code, save those details beside the converted latitude and longitude.
MGRS or State Plane source data: Stop before typing the numbers into the UTM fields. Decode MGRS with an MGRS-aware tool, or convert State Plane with the correct zone and datum. After that, bring the verified latitude/longitude or UTM values back here for supported formatting.
Yes. The calculator converts latitude/longitude between decimal degrees and degrees minutes seconds (DMS). It can also convert decimal latitude/longitude to UTM zone, easting, and northing values. Keep the latitude and longitude labels with the result so the numbers are not swapped when copied into a map or spreadsheet.
It can convert UTM-style northing and easting when you also know the UTM zone. Northing and easting alone are not enough because State Plane, UTM, local grids, and engineering drawings can use different zones, datums, units, and false origins. Confirm the coordinate system before treating a grid value as latitude/longitude.
Decimal Degrees (DD) represents coordinates as decimal numbers, such as 40.7128, -74.0060. Degrees Minutes Seconds (DMS) breaks the same angle into degrees, minutes, and seconds, such as 40° 42' 46.08" N. DD is common in GPS, APIs, and spreadsheets, while DMS is common in printed maps, navigation notes, and field reports.
Universal Transverse Mercator (UTM) divides Earth into 60 zones and expresses a location as a zone, easting, and northing in meters. UTM is useful for mapping, GIS, field work, and distance checks inside one zone because the values behave like a grid. Always keep the zone and hemisphere or zone letter with the coordinate.
No. MGRS is built on UTM or UPS but adds a grid zone designator, a 100-kilometer square identifier, and shortened easting/northing digits. This calculator does not parse or output MGRS references. Use a dedicated MGRS tool or GIS system when your source value looks like an MGRS grid reference.
No. State Plane conversion requires the specific state zone, projection, datum, and units, often feet rather than meters. Those details are not interchangeable with UTM northing/easting. Use a State Plane or GIS converter for SPCS values, especially for survey, property, or engineering work.
Differences usually come from datum choice, rounding, coordinate order, hemisphere handling, zone selection, or unit assumptions. This calculator is intended for practical format conversion and planning checks. Verify high-stakes results with the source dataset, official GIS software, or a qualified professional.
Keep precision that matches the job. A travel note can use fewer decimals, while surveying, utilities, emergency response, and field data collection need more. Do not add extra decimals if the original coordinate was collected with low accuracy, because extra digits can make an uncertain point look more precise than it is.
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