About Coordinate Converter
Coordinate Converter was created to make rigorous geodetic transformations accessible, lightning-fast, and strictly private. Built for GIS analysts, land surveyors, cartographers, drone operators, and outdoor navigators, our tools run directly in your web browser with zero server data retention.
Our Three Core Principles
100% Client-Side Privacy
All coordinate conversions and bulk CSV batch processing execute entirely in your local browser memory using JavaScript and Web Workers. Your sensitive spatial points, survey logs, and client data are never sent to or stored on our servers.
Mathematical Integrity
Our conversion engine solves geodetic equations using standard IEEE 754 64-bit double precision. Formulas strictly follow published standards including USGS Professional Paper 1395 (Snyder) and NATO STANAG 2211, regularly benchmarked against PROJ and GeographicLib.
Zero-Install Web Access
Fieldwork demands immediate answers. Rather than launching heavy desktop software like QGIS or ArcGIS for basic reprojection or format detection, our web tools deliver instant, mobile-ready coordinate transformations anywhere you have a browser.
Supported Coordinate Systems
Latitude & Longitude (GPS)
Supports Decimal Degrees (DD), Degrees Minutes Seconds (DMS), and Degrees Decimal Minutes (DDM) across standard WGS84 and GRS80 ellipsoids.
Universal Transverse Mercator (UTM)
Worldwide 60-zone metric projection with precise Easting, Northing, and scale factor calculation, plus Universal Polar Stereographic (UPS) for polar regions.
Military Grid Reference System (MGRS)
NATO standard alphanumeric grid formatting with variable precision (1m to 10km grid squares) widely utilized in search and rescue (SAR) and defense.
State Plane & National Grids
Regional coordinate systems including US State Plane (SPCS 83 / 27), British National Grid (OSGB36), and Japanese Plane Rectangular zones.
Explore Our Precision Tool Suite
Instant, accurate, and completely free coordinate conversion tools.
Coordinate Converter
Multi-system converter with interactive map preview and auto-copy.
UTM Converter
Convert between Lat/Long and UTM coordinates with zone calculation.
Batch File Converter
Reproject thousands of points from CSV, TSV, or XLSX in seconds.
Distance & Bearing
High-accuracy geodesic distance and initial azimuth calculations.
Format Auto-Detector
Paste any ambiguous coordinate string to automatically detect its CRS.
Knowledge Hub & Guides
Detailed technical guides on datums, ellipsoids, and GIS workflows.
Geodetic Standards & Accuracy
We believe that transparent mathematics is essential for professional trust. Our transformation engine implements open, peer-reviewed geodetic standards:
- Snyder Transverse Mercator: Implemented according to USGS Professional Paper 1395 (Map Projections—A Working Manual).
- MGRS Grid Conversions: Based on NATO STANAG 2211 and US DMA Technical Manual 8358.1 specifications.
- EPSG / IOGP Standards: Conforms to IOGP Guidance Note 7-2 coordinate conversion and transformation formulas.
- Reference Ellipsoids: Calculations assume WGS84 / GRS80 ellipsoids unless explicit localized datum shifts are defined.
Note on accuracy: Software calculations maintain double-precision mathematical fidelity. However, real-world positional accuracy depends on the original measurement sensor (e.g. consumer smartphone GPS vs dual-frequency RTK-GNSS receiver).
Have Questions or Suggestions?
We welcome feedback from surveyors, developers, and GIS professionals.