GMS to Decimal Degrees

Convert GMS (degrees, minutes, seconds) coordinates to decimal degrees format instantly.

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About This Tool

This tool converts geographic coordinates from GMS (degrees, minutes, seconds) format to decimal degrees. Simply enter the degrees, minutes, seconds, and direction (N/S/E/W), and get the decimal equivalent. Useful for mapping, GPS devices, GIS applications, and any geographic data processing. The conversion is performed client-side for fast, secure results.

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How to Use

Enter the degrees value (0-360 for longitude, 0-90 for latitude).
Enter the minutes value (0-
.
Enter the seconds value (0-
..).
Select the direction (N, S, E, W).
Click 'Convert to Decimal Degrees' to see the result.
Use 'Reset' to clear all fields and start over.

Frequently Asked Questions

Find Quick Answers

What is GMS format?

GMS stands for Degrees, Minutes, Seconds. It's a common way to express geographic coordinates, where 1 degree = 60 minutes, and 1 minute = 60 seconds.

How accurate is the conversion?

The conversion uses precise floating-point arithmetic, providing accuracy up to many decimal places. Seconds can include decimals for finer precision.

Can I convert negative coordinates?

Yes, use the direction selector: N and E are positive, S and W are negative in decimal degrees. For example, 30° S becomes -30° in decimal.

What are the valid input ranges?

Degrees: 0-360 for longitude, 0-90 for latitude. Minutes: 0-59. Seconds: 0-59.999... (any non-negative number). Direction: N, S, E, or W.

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