GEO Calc : Coordinates

Offline-first coordinate tools for the field: convert formats, measure distance & area, save waypoints, and navigate—accurate and ready with no signal.

GEO Calc : Coordinates is a WGS84 field calculator for surveyors, engineers, and outdoor professionals. Convert coordinates, compute geodesic distance and bearing, measure on a map, and manage waypoints—on iPhone and iPad.

COORDINATE CONVERTER Convert Decimal Degrees, DDM, DMS, UTM, MGRS, USNG, and Plus Codes. Auto-detect format. Copy results in one tap.

DISTANCE & BEARING Vincenty geodesic distance and forward azimuth on the WGS84 ellipsoid—not flat-map shortcuts. Direct geodesic calculator (Pro).

MAP & MEASURE OpenStreetMap tiles with path and polygon measure on the ellipsoid. Optional satellite layer (Pro). Go-to coordinate. Live GPS (Pro).

FIELD NAVIGATOR (PRO) Walk to a coordinate with a live compass arrow and arrival alert.

WAYPOINTS & GPX Save waypoints on your device. Export GPX 1.1. Import GPX waypoints (Pro). Free tier: up to 20 waypoints.

UNITS & LANGUAGES Metric, imperial, or nautical. Twelve languages. Dark theme for outdoor readability.

IN-APP PURCHASES Free to download with ads. GEO Calc Pro is a one-time, non-consumable in-app purchase—no subscription. Pro unlocks direct geodesic calculator, live GPS, field navigator, satellite map layer, GPX import, and unlimited waypoints. Restore purchases anytime from Settings or the Pro screen.

INTERNET & LOCATION Map tiles load over the internet from OpenStreetMap. Live GPS and field navigation use device location when you allow it.

Not for certified legal surveying. Verify critical measurements with professional methods.