Convert between DMS (Degrees Minutes Seconds) and DD (Decimal Degrees) formats online. GPS coordinate conversion · Pure frontend · Data never leaves your device
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Enter DMS Coordinates
Result
City Coordinates Examples
Geographic Coordinate Converter - DMS to DD Online Tool
This free online geographic coordinate converter allows you to convert between DMS (Degrees Minutes Seconds) and DD (Decimal Degrees) formats. Whether you're a GIS professional, surveyor, drone pilot, or outdoor enthusiast, quickly convert between coordinate formats.
Supported Formats
- DMS (Degrees Minutes Seconds): DD°MM'SS" format, e.g., 39°54'26"N
- Decimal Degrees (DD): DD.dddd format, e.g., 39.9072°N
- Directional DMS: N/S/E/W hemisphere indicators
- Signed DD: Positive for N/E, negative for S/W
Features
- Bi-directional DMS ↔ DD conversion with instant results
- Built-in city examples for quick testing
- Pure client-side processing, data never uploaded
- One-click copy for convenient use
- High precision (6 decimal places for DD)
When to Use Geographic Coordinate Converter
- GIS data processing and standardization
- GPS navigation coordinate format conversion
- Drone waypoint coordinate formatting
- Surveying and cartographic coordinate handling
- Outdoor sports (hiking, cycling) track coordinates
- Academic geographic data normalization
FAQ
What is DMS (Degrees Minutes Seconds) format?
DMS is a traditional way of expressing geographic coordinates as DD°MM'SS". One degree equals 60 minutes, one minute equals 60 seconds. For example, Beijing's latitude is 39°54'26"N.
What is DD (Decimal Degrees) format?
DD uses decimal numbers for degrees, e.g., 39.9072°. North/East are positive; South/West are negative. This format is common in digital maps and GPS devices.
How precise is the conversion?
Seconds are rounded to 3 decimal places, DD to 6 decimal places. One second of latitude ≈ 30m, so 3 decimal seconds ≈ 3cm precision — suitable for professional use.
Can I convert multiple coordinates at once?
Currently single-point conversion. For batch processing, use this tool repeatedly or contact us for custom solutions.