Coordinate Converter
Convert coordinates between DD, DMS, and UTM — with Haversine great-circle distance calculation.
Three tools in one — convert any coordinate between the three most common geographic formats, and calculate the great-circle distance between two points using the Haversine formula.
| Format | Example |
|---|---|
| Decimal Degrees (DD) | 51.5074, -0.1278 |
| Degrees Minutes Seconds (DMS) | 51° 30' 26.6" N, 0° 7' 40.1" W |
| UTM | 30U 699313 5710164 |
[!TIP] When copying coordinates from Google Maps, you get lat, lng in Decimal Degrees. Most GIS tools and GeoJSON expect lng, lat — use this tool to confirm which axis is which before wiring data into your application.
Coordinate Converter
100% Client-Side
Decimal Degrees DD
e.g. London: 51.5074, -0.1278
Degrees Minutes Seconds DMS
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Universal Transverse Mercator UTM
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Haversine Distance Calculator
Enter two points in Decimal Degrees to calculate the great-circle distance between them.
Point A
→
Point B
Privacy Check: All conversions are computed locally using standard geodetic formulas. No coordinates leave your browser.