Free, no sign-up, runs entirely in your browser. Paste a latitude or longitude in degrees/minutes/seconds, decimal degrees, or degrees decimal minutes — get all three formats back, plus a ready-to-use GeoJSON point.
48.858222, 2.294500
48°51'29.60"N 2°17'40.20"E
48°51.493'N 2°17.670'E
{
"type": "Feature",
"properties": {},
"geometry": {
"type": "Point",
"coordinates": [
2.2945,
48.858222
]
}
}Build a free dotted map of any country, region, or city — pick colors, dot size, and background, then export as PNG right away.
Browse dotted mapsGeographic coordinates show up in three common notations. DMS (degrees, minutes, seconds — like 40°26'46.3"N) is what GPS units, surveyors, and older maps and legal land descriptions tend to use, because it mirrors how angles are measured with a sextant or theodolite. Decimal degrees (like 40.446194) is a single signed number per axis — positive for north/east, negative for south/west — and it's what nearly every piece of modern mapping software expects: GeoJSON, Google Maps URLs, Leaflet, Mapbox, and spreadsheet or database columns all store coordinates this way. DDM (degrees and decimal minutes, like 40°26.767'N) sits in between and shows up most often on marine and aviation GPS displays.
This tool auto-detects whichever format you paste in. Type a plain number and it's read as decimal degrees. Include a °, ', or " symbol (or just spaces between the parts) and it's read as DMS or DDM. A trailing N/S/E/W letter sets the sign; a leading minus sign works too if you'd rather skip the letter. Latitude is checked against the -90 to 90 range and longitude against -180 to 180 — anything outside that, or anything that isn't recognizably a coordinate, shows an inline error instead of a wrong answer.
A typical reason to convert: you've copied a coordinate off a GPS device, an old survey document, or a photo's EXIF data in DMS format, and you need decimal degrees to paste into a mapping tool, a spreadsheet, or a GeoJSON file. Going the other way — decimal to DMS — is useful when you need to read a coordinate aloud, cross-check it against a paper chart, or match the format a legal or navigational document expects.
Results round to six decimal places for decimal degrees (about 11 centimeters of precision) and two decimal places for DMS seconds, which comfortably exceeds consumer GPS accuracy while staying easy to read and copy.