How do I convert DMS to DD?

To convert DMS to DD: DD = Degrees + Minutes/60 + Seconds/3600. For South or West coordinates, make the result negative.

How do I convert DD to DMS?

Take the integer part as degrees, multiply the decimal by 60 to get minutes, then multiply the remaining decimal by 60 to get seconds. Add N/S/E/W direction based on sign.

Free Geographic Coordinate Converter

Convert between DMS (Degrees Minutes Seconds) and DD (Decimal Degrees) formats online. GPS coordinate conversion · Pure frontend · Data never leaves your device

Pure Frontend·Offline Capable

Conversion Direction

DMS → DD DD → DMS

Enter DMS Coordinates

Latitude

Deg (°)

Min (')

Sec (")

Dir

Longitude

Deg (°)

Min (')

Sec (")

Dir

Result

Latitude:

39.9072°N / 39°54'26"N

Longitude:

116.3914°E / 116°23'29"E

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)

Use Cases

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.

🗺️ Geographic Coordinate Converter

Conversion Direction

Enter DMS Coordinates

Enter DD Coordinates

Result

City Coordinates Examples

Geographic Coordinate Converter - DMS to DD Online Tool

Supported Formats

Features

Use Cases

FAQ

What is DMS (Degrees Minutes Seconds) format?

What is DD (Decimal Degrees) format?

How precise is the conversion?

Can I convert multiple coordinates at once?

🗺️ Geographic Coordinate Converter

Conversion Direction

Enter DMS Coordinates

Enter DD Coordinates

Result

City Coordinates Examples

Geographic Coordinate Converter - DMS to DD Online Tool

Supported Formats

Features

Use Cases

FAQ

What is DMS (Degrees Minutes Seconds) format?

What is DD (Decimal Degrees) format?

How precise is the conversion?

Can I convert multiple coordinates at once?

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