DMS to DDM Converter
Converts coordinates from degrees minutes seconds to degrees decimal minutes.
Enter DMS value
Results
Enter a value and press Convert to see the results in DD, DMS and DDM.
Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.
How to use this calculator
- Enter the coordinate in degrees-minutes-seconds (e.g. 40 26 46.3).
- Press Convert.
- Read the degrees-decimal-minutes value.
How it works
Converts degrees-minutes-seconds (DMS) to degrees-decimal-minutes (DDM): the degrees stay, and seconds ÷ 60 are added to the minutes.
Worked example
40° 26′ 46.3″. = 40° 26.772′.
Frequently asked questions
Do I lose precision converting between formats?
No — all three formats describe the same angle. Only the on-screen rounding changes.
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Cite this tool
Zerdly. (2026). DMS to DDM Converter. Retrieved from https://www.zerdly.com/tools/dms-to-ddm-converter/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.