Geography & Geodesy Tools
Free online tools for GPS coordinate conversion, great circle distances, compass bearings, elevation physics, time zones, and country geographic utilities. All tools run 100% in your browser with zero server uploads and instant processing.
Latitude / Longitude Converter
Convert geographic coordinates between Decimal Degrees (DD), DMS, and DDM
Universal Coordinate Converter
Convert between WGS84, Universal Transverse Mercator (UTM), and ECEF Cartesian grid
GPS Format Converter
Convert coordinates to NMEA 0183 ($GPGGA), Geohash, Plus Codes, and GPX XML
DMS to Decimal Degrees Converter
Parse messy coordinate strings with symbols and convert to normalized Decimal Degrees
Distance Between Coordinates Calculator
Calculate accurate distance between two coordinates using Haversine & Vincenty WGS84
Great Circle Distance Calculator
Compare curved Great Circle routes against constant-heading Rhumb Lines with waypoints
Bearing & Azimuth Calculator
Calculate forward azimuth, reciprocal back bearing, and 32-point compass rose direction
Decimal Degrees Precision Analyzer
Inspect coordinate decimal places and real-world ground resolution from km to mm
Elevation & Barometric Altitude Calculator
Calculate barometric altitude, water boiling points, horizon distance, and trail slopes
Geographic Time Zone & Solar Noon Finder
Find solar time zones, local solar noon, Equation of Time, and solar declination
World Country Geographic Utilities
Searchable geographic database of 240+ countries with capitals, coordinates, and codes
Geographic Land Area Converter
Convert geographic land measures across km², hectares, acres, dunams, and square miles
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