DMS to Decimal Degrees Converter
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter Angle
Angle
Sign
Results
Enter a value and press Convert to see the results in DD, DMS and DDM.
How to use this calculator
- Choose DD, DMS or DDM with the toggle.
- Enter the angle, then press Convert to see all three formats.
How it works
To convert degrees-minutes-seconds to decimal degrees: DD = degrees + minutes ÷ 60 + seconds ÷ 3600. The tool also shows degrees and decimal minutes (DDM).
Worked example
40° 26′ 46.302″. = 40 + 26 ÷ 60 + 46.302 ÷ 3600 = 40.446195°.
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Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.