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WGS84 tools offline: convert UTM & MGRS, Vincenty measure, map, GPS & GPX.
GEO Calc is a professional field instrument for geographic calculations on the WGS84 ellipsoid — built for surveyors, engineers, and outdoor professionals who work where networks don't. COORDINATE CONVERTER Convert between Decimal Degrees, DMS, UTM, and MGRS. Paste any format with auto-detect. Copy results in one tap. LIVE GPS Real-time coordinates in every supported format when location is available. DISTANCE & BEARING Ellipsoidal geodesic distance and forward azimuth between two points using Vincenty calculations — not flat-map shortcuts. DIRECT GEODESIC Enter bearing and distance to compute a precise destination coordinate. MAP MEASURE Draw paths and polygons on an offline map canvas. Measure path length and polygon area on the WGS84 ellipsoid. Optional GPS centering. FIELD NAVIGATOR Live compass arrow to any coordinate — walk to a point with arrival feedback. WAYPOINTS & GPX Save named waypoints on device. Export as GPX 1.1 for GIS tools and GPS devices. UNITS & LANGUAGES Metric, imperial, or nautical display. Twelve languages. Dark theme for outdoor readability. OFFLINE BY DESIGN Core tools work without a network. No account required. Your data stays on your device. FREE WITH OPTIONAL PRO GEO Calc is free with banner and interstitial ads. Upgrade once to Pro for live navigator, satellite map, USNG & Plus Codes, GPX import, unlimited waypoints, and no ads. No subscription. Not a substitute for certified surveying instruments or legal boundary determinations. Verify critical measurements with appropriate professional methods.
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