Online Coordinate Converter - Professional GPS Calculator

Precise coordinate conversion between 6000+ systems: WGS84, UTM, DMS, DD, OSGB36, NAD83, ETRS89. Uses Proj4js library for maximum accuracy

Coordinate Converter
Proj4js 6000+ systems EPSG registry
Input Data Ready for input
Result
Coordinate Actions
Global UTM Zones
UTM zone distribution by regions worldwide
UTM Zone Region Countries/Areas EPSG Code
30N Western Europe UK, Ireland, Portugal, Spain EPSG:32630
31N Central Europe France, Germany, Italy, Norway EPSG:32631
32N Eastern Europe Poland, Sweden, Finland EPSG:32632
33N Eastern Europe Baltic States, Western Russia EPSG:32633
Conversion Examples
Coordinates of major cities in different formats
City WGS84 (DD) UTM (in meters) DMS
London (Big Ben) 51.5074, -0.1278 699330, 5710164 51°30'26.64"N 0°7'40.08"W
New York (Times Square) 40.7580, -73.9855 583960, 4507523 40°45'28.8"N 73°59'7.8"W
Sydney (Opera House) -33.8568, 151.2153 334777, 6251406 33°51'24.48"S 151°12'55.08"E
Supported Coordinate Systems
WGS84 - World Geodetic System (EPSG:4326)

Description: GPS navigation standard, used by all modern smartphones and navigators

Usage: GPS devices, Google Maps, mobile applications

Format: 51.5074°, -0.1278°

Accuracy: Global accuracy 1-5 meters

UTM Zone 30N - Western Europe (EPSG:32630)

Description: Metric coordinate system for Western Europe including UK and Ireland

Usage: Geodesy, cartography, land surveying

Format: 699330 m E, 5710164 m N

Accuracy: High precision within zone, up to 1 cm

UTM Zone 31N - Central Europe (EPSG:32631)

Description: Metric system for Central Europe

Usage: Central European regions, Scandinavia

Format: 448251 m E, 5710920 m N

Accuracy: Optimal for central regions

OSGB36 - British National Grid (EPSG:27700)

Description: UK national coordinate system, Ordnance Survey Great Britain 1936

Usage: Official UK mapping, Ordnance Survey

Format: Transverse Mercator Projection

Accuracy: High precision for Great Britain

NAD83 - North American Datum (EPSG:4269)

Description: North American coordinate system, widely used in US and Canada

Usage: US geological surveys, Canadian mapping

Format: GRS80 Ellipsoid based

Accuracy: High precision for North America

ETRS89 - European Terrestrial Reference System (EPSG:4258)

Description: European coordinate system, close to WGS84

Usage: European projects, INSPIRE directive

Format: Similar to WGS84

Accuracy: High precision for Europe

Web Mercator - Online Maps (EPSG:3857)

Description: Web cartography standard, used by Google Maps, OpenStreetMap

Usage: Web maps, mobile applications, GIS

Format: X: -14239 m, Y: 6711665 m

Accuracy: Distortions at poles, limited to ±85°

Frequently Asked Questions
How to convert GPS coordinates to degrees minutes seconds?

To convert decimal degrees to DMS: take the whole part as degrees, multiply the decimal part by 60 for minutes, then multiply the decimal part of minutes by 60 for seconds. Example: 51.5074° = 51°30'26.64"

What is the difference between WGS84 and UTM coordinates?

WGS84 - geographic system in degrees (latitude/longitude), UTM - projection system in meters. UTM divides Earth into 60 zones for precise distance measurements. GPS gives WGS84, which can be converted to UTM

How to determine UTM zone for any location?

UTM zones are determined by longitude. The formula is: (longitude + 180) / 6 + 1. London is in zone 30N, New York in 18N, Sydney in 56S. The zone is calculated automatically from coordinates

Can I accurately convert OSGB36 to WGS84?

Precise conversion requires regional transformation parameters. Proj4js uses official EPSG parameters for maximum accuracy. General formulas give 10-50 meter error, but proper datum transformations achieve sub-meter accuracy

What is the accuracy of Proj4js converter?

Proj4js provides professional accuracy: mathematical transformations (DMS↔DD) - up to millimeters, projections (WGS84↔UTM) - up to centimeters, datum transformations - 0.1-1 meter with official EPSG parameters

Which coordinate systems are supported?

Over 6000 coordinate systems from EPSG database: all UTM zones, national systems (OSGB36, NAD83, State Plane), European standards, Lambert, Mercator projections and many others

Online Coordinate Converter with Proj4js - Professional GPS Calculator

Our professional coordinate converter uses the Proj4js library to ensure maximum accuracy when converting between different coordinate systems. The calculator supports over 6000 coordinate systems from the official EPSG registry, including GPS coordinates WGS84, all UTM zones, degrees-minutes-seconds (DMS), national systems like OSGB36 and NAD83, as well as European standards.

Advantages of Using Proj4js

Professional transformation accuracy: Proj4js is the industry standard for geodetic calculations, used by leading GIS systems worldwide. The library ensures accuracy up to centimeters for projection conversions and metric accuracy for transformations between different datums, taking into account official EPSG parameters.

Extensive coordinate system support: the library includes definitions for all national and international coordinate systems. Supported systems include WGS84, all UTM zones, national grids (OSGB36, NAD83, State Plane), European standards ETRS89, and local coordinate systems. Each system has precise ellipsoid, datum, and projection parameters.

Automatic parameter determination: Proj4js automatically applies the correct transformation parameters between coordinate systems based on EPSG codes. This eliminates manual parameter input errors and ensures the use of the most current geodetic data from international organizations.

What are Coordinates and Why Convert Them

Geographic coordinates - universal number system for precisely determining the location of any point on Earth's surface. Coordinates consist of latitude (distance from equator) and longitude (distance from prime meridian). Different countries and organizations use different coordinate systems optimized for specific regions and tasks.

Decimal degrees (DD) - modern digital GPS navigation format where coordinates are recorded as decimal fractions. Example for London: 51.5074°, -0.1278°. This format is used by smartphones, car navigators, and online maps due to simplicity of mathematical calculations and record compactness.

Degrees-minutes-seconds (DMS) - traditional navigation format where each degree is divided into 60 minutes, and each minute into 60 seconds. London record: 51°30'26.64"N 0°7'40.08"W. Used in marine navigation, aviation, and topographic maps.

UTM coordinates - metric projection system that divides Earth into 60 zones of 6° longitude each. Coordinates are given in meters relative to zone center: Easting (distance east) and Northing (distance north). UTM is convenient for precise measurements of distances, areas, and angles.

Use our professional coordinate converter with Proj4js for the most accurate conversion between coordinate systems. The tool provides industrial precision geodetic calculations, supports all international standards, and is optimized for global coordinate systems. Perfect for GPS navigation, geodetic work, cartography, GIS projects, and scientific research.

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