buncha/engineering/gps-convert

GPS Coordinate Converter

Coordinate input

Paste any of: decimal, DMS, or degrees-decimal-minutes.

Sample locations

Decimal Degrees

40.689200, -74.044500

DD — what apps and APIs prefer

Degrees / Minutes

40°41.3520'N 74°2.6700'W

DDM — what marine charts use

Degrees / Min / Sec

40°41'21.12"N 74°02'40.20"W

DMS — what topographic maps use

Open in OpenStreetMap Open in Google Maps Open in default maps app

Which format do I want? Decimal degrees (DD) are what almost every API, JavaScript geolocation call and modern map app expects. Degrees-decimal-minutes (DDM) is the marine and aviation standard — easier to read off a compass. Degrees-minutes-seconds (DMS) is what older topographic maps and survey records use. They all describe the same point; the conversion is just trigonometry with the right separators.

Conversions run entirely in your browser.

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About GPS Coordinate Converter

Convert any coordinate between decimal degrees (DD), degrees-decimal-minutes (DDM) and degrees-minutes-seconds (DMS). Tolerant parser — paste decimals, DMS with hemisphere letters, mixed unicode, whatever. Direct links to OpenStreetMap and Google Maps.

Everything happens on your device. Close the tab and it's gone.