Convert geographic coordinates between decimal degrees, degrees-minutes-seconds and degrees-decimal-minutes.
Geographic coordinates identify any point on Earth with two numbers: latitude (north-south, -90 to 90) and longitude (east-west, -180 to 180). The same point can be written in three common formats: decimal degrees (DD), degrees-minutes-seconds (DMS) and degrees-decimal-minutes (DDM). This tool converts between all three instantly.
DD is what most software and APIs use: a plain number with a sign for hemisphere. DMS is the traditional format on paper maps and in legal descriptions: 23°33'1.8"S. DDM sits in between and is common in marine navigation. The conversions are straightforward — one degree is 60 minutes, one minute is 60 seconds — but easy to get wrong by hand, especially with the hemisphere sign.
Everything runs in your browser. The coordinates you type are not sent anywhere and the page works offline.
DD to DMS: degrees = integer part, minutes = integer part of (fractional × 60), seconds = remainder × 60. DMS to DD: degrees + minutes/60 + seconds/3600, negative if S or W.
DD uses a decimal number (-23.5505). DMS splits it into degrees, minutes and seconds (23°33'1.8"S). DDM keeps the degrees integer but uses decimal minutes (23°33.03'S). All three describe the same point.
Either use a negative number (-23.5505) or add the cardinal letter after the number (23.5505S). Both work.
No. The conversion is pure arithmetic and runs entirely in your browser.
The tool converts between formats, not between datums. The coordinates stay in whatever datum you typed — usually WGS84, which is what GPS and most web maps use.
Yes. Google Maps uses DD format (-23.5505, -46.6333). Paste each number into the corresponding field.
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