Coordinates Converter

A survey report, an old chart or a handheld GPS hands you 23°33'01.8 S, and the field you have to paste it into expects -23.5505. Or the other way round: you have the decimal pair and the paperwork insists on degrees, minutes and seconds. Both directions are here, one button each, and every result comes with a ready Google Maps link so you can check that the point landed where you expected.

Here is what trips people up: in decimal degrees the sign carries the hemisphere, while in DMS the letter does. South and West are negative. Paste 23°33'01.8 with no S at the end and the converter assumes North and hands back a positive number, putting your point in the wrong half of the planet. The field takes free-form text and, when the pattern is not recognised, falls back to reading whatever you pasted as a plain decimal.

Open the Maps link before you trust the output. A flipped sign usually drops the pin in the middle of an ocean, which is obvious on a map and invisible in a spreadsheet. Precision follows the decimals: six places sit around 11 cm, four places are already 11 m. What it does not do is change datum (WGS84, NAD83, SIRGAS2000) or produce UTM coordinates. Everything runs in the browser, nothing is uploaded.