How do I batch convert coordinates?

Paste your coordinates into the input box (one per line) or upload a .txt, .csv or .gpx file. The converter detects each line's format automatically and produces every supported format in a side-by-side results table. You can copy single cells, whole columns, or download the full table as CSV.

Which coordinate formats are supported?

Decimal Degrees (DD), Degrees-Minutes-Seconds (DMS), Degrees-Decimal-Minutes (DDM), UTM, MGRS, US State Plane (SPCS), UK National Grid (Easting/Northing) and UK Grid References (e.g. TQ37942 78526). You can mix formats freely on one paste; each line is detected and parsed independently.

Which datums does the bulk converter support?

WGS84 (default), OSGB36, NAD83, NAD27 and ETRS89. Format-locked inputs like UK Grid References automatically use OSGB36; MGRS uses WGS84.

Is the batch coordinate converter free?

Yes. Conversion runs entirely in your browser, no signup is required and there is no limit on the number of points. Your data never leaves your device.

Can I convert UK Grid references to lat/long in bulk?

Yes. Paste a list of OSGB36 grid references (alphanumeric like TQ37942 78526, or numeric easting/northing) and the converter will return WGS84 latitude/longitude alongside every other supported format.

Bulk Coordinate Converter

Paste or upload a list of Decimal Degrees, DMS, DDM, UTM, MGRS, US State Plane (SPCS) or UK Grid coordinates and see every other format side by side. Mix formats in one paste, then download as CSV or send the points to the map.

Paste or upload coordinates

Format

Fallback datum

Each line is parsed independently. Formats like MGRS, UTM and UK Grid carry their own datum, so the fallback above is only used when the format is ambiguous (such as plain decimal degrees).

Paste or upload coordinates above to see them converted into every format here.

Need to plot these on a map after converting? Use the "Open in Map" button to send the parsed points to the interactive map view.

About this bulk converter

This tool is built for a workflow that comes up constantly in surveying, GIS, drone planning and field data collection: you have a list of coordinates in one format and you need them in another. Instead of converting them one at a time, paste the whole list and get a clean table back. Every point is parsed independently, converted into every supported format, and you can copy individual cells, whole columns, or download the entire table as CSV for Excel.

Each line is auto-detected. The parser recognises the shape of Decimal Degrees, Degrees-Minutes-Seconds, Degrees-Decimal-Minutes, UTM, MGRS and UK Grid references (both alphanumeric like TQ37942 78526 and pure numeric Eastings/Northings). You can mix formats freely on one paste: lat/long on one line, a UK Grid reference on the next, MGRS on the one after. Format-locked formats automatically use the correct datum (OSGB36 for UK Grid, WGS84 for MGRS); for ambiguous numeric inputs you can pick a fallback datum (WGS84, OSGB36, NAD83, NAD27 or ETRS89).

Supported formats

Decimal Degrees

Plain latitude and longitude as decimals.

51.488865, -0.014573

Degrees, Minutes, Seconds

DMS

Classic sexagesimal format with hemisphere letters.

51°29'19.91"N 0°0'52.46"W

Degrees, Decimal Minutes

DDM

Common on marine GPS units and aviation charts.

51° 29.3318' N 0° 0.8744' W

Universal Transverse Mercator

UTM

Zone, hemisphere, easting and northing in metres.

30N 707256 5708417

Military Grid Reference System

MGRS

NATO standard grid used by military and emergency services.

18T WL 80733 04701

UK Grid Reference

UK Grid

OSGB36 alphanumeric reference for Great Britain.

TQ37942 78526

UK Easting and Northing

UK E/N

OSGB36 numeric coordinates in metres.

537942, 178526

Common conversions

The batch converter above handles all of these in one paste. If you want a written explainer for any specific pair, jump to the matching guide:

Who uses the batch converter?

Surveyors

Convert site control points between OSGB36 Eastings/Northings, UK Grid references and WGS84 lat/long before sharing with a client or a CAD package.

GIS analysts

Clean and standardise messy coordinate lists from multiple sources before importing into QGIS, ArcGIS or PostGIS. UTM, MGRS and DD all parse from one paste.

Drone & aviation pilots

Convert waypoints between DD, DDM (common on GPS handhelds) and DMS (aviation charts) without retyping each one.

Search & rescue / emergency services

Translate MGRS grid references reported over radio into civilian latitude and longitude for mapping software in seconds.

Hikers & outdoor crews

Turn a list of UK Grid references from an OS map into lat/long for Google Maps, or the other way round, in one go.

Data cleanup

Drop a .csv export from any field-data app, pick the right datum, and get back a clean, Excel-ready table with every standard format computed.