How to Convert Coordinates Between Latitude/Longitude and UTM Online

Converting coordinates between formats is one of the most common tasks in GIS workflows. Whether you’re working with field GPS data, preparing data for a map, or reading coordinates from a report, you’ll often need to switch between Decimal Degrees, DMS, UTM, or MGRS.

Why Coordinate Conversion Matters

Different data sources use different coordinate formats. GPS devices typically output in Decimal Degrees or DMS. Survey data uses UTM. Military maps use MGRS. GIS software expects consistent formats. Being able to convert between these efficiently saves time and prevents errors.

Using the GeoDataViewer Coordinate Converter

The Coordinate Converter tool converts between four common formats instantly in your browser:

1. Decimal Degrees — e.g., 40.7128, -74.0060
2. Degrees Minutes Seconds (DMS) — e.g., 40°42'46"N, 74°00'21"W
3. UTM — e.g., 18T 583960 4507520
4. MGRS — e.g., 18TWL8396075200

Common Conversion Scenarios

GPS to GIS

GPS devices often output in DMS format. Convert to Decimal Degrees for use in QGIS, ArcGIS, or GeoDataViewer.

Survey Data to Map

Survey points are typically in UTM coordinates. Convert to Decimal Degrees for web mapping applications.

Field Data Collection

Convert between any format on your phone or tablet — no app installation needed since everything works in the browser.

Related Tools

• UTM Zone Finder — Find the UTM zone for any location
• Bounding Box Tool — Draw and export bounding boxes in multiple formats
• GeoJSON Validator — Validate coordinate data in GeoJSON files

All tools run locally in your browser — nothing is uploaded to any server.