Geodesy & Distance Calculators
GPS coordinates, Haversine distance, bearings, map scale, elevation, and surveying calculations.
GPS Coordinate Converter
Convert GPS coordinates between Decimal Degrees (DD), Degrees Minutes Seconds (DMS), and Degrees Decimal Minutes (DDM).
Decimal Degrees to DMS Converter
Convert decimal degree coordinates to Degrees, Minutes, and Seconds (DMS) format.
DMS to Decimal Degrees Converter
Convert Degrees, Minutes, and Seconds (DMS) coordinates to Decimal Degrees (DD).
Lat/Long to UTM Converter
Convert geographic latitude and longitude coordinates into Universal Transverse Mercator (UTM) zone and metric coordinates.
UTM to Lat/Long Converter
Convert Universal Transverse Mercator (UTM) zone, Easting, and Northing coordinates back to geographic latitude and longitude.
ECEF to Lat Long Height Converter
Convert 3D Earth-Centered, Earth-Fixed (ECEF) Cartesian coordinates (X, Y, Z) to WGS-84 latitude, longitude, and ellipsoidal height.
Lat Long Height to ECEF Converter
Convert WGS-84 latitude, longitude, and ellipsoidal height into 3D Earth-Centered, Earth-Fixed (ECEF) X, Y, Z Cartesian coordinates.
Distance Calculator
Calculate straight-line geodesic (Haversine) distance between geographic coordinates or world cities.
Country Distance Calculator
Calculate straight line distance between major world countries and capital cities.
Haversine Distance Calculator
Compute exact great-circle distance between two latitude and longitude coordinates using the Haversine trigonometric formula.
Vincenty Distance Calculator
Calculate high-precision ellipsoidal geodesic distance on the WGS-84 ellipsoid using Vincenty inverse algorithm.
Rhumb Line / Loxodrome Distance Calculator
Calculate constant-bearing rhumb line (loxodrome) distance and navigational course angle between coordinates.
Horizon Distance Calculator
Calculate the line-of-sight distance to the visible horizon based on observer elevation and Earth radius.
Earth Curvature Drop Calculator
Calculate vertical drop and hidden obstacle height over distance due to Earth curvature.
Initial & Final Bearing Calculator
Calculate forward initial compass bearing and reverse final bearing between two geographic coordinates.
Destination Point Calculator
Calculate destination coordinates given a starting point, initial compass bearing, and travel distance.
Midpoint Coordinate Calculator
Calculate the exact half-way geographic midpoint along the great-circle path between two coordinates.
Earth Radius by Latitude Calculator
Calculate the exact WGS-84 ellipsoidal Earth radius at any specified latitude.
GPS Waypoint ETA Calculator
Calculate estimated time of arrival (ETA) and average speed across multiple GPS waypoints.
Surveying Traverse Calculator
Calculate closed and open traverse latitude/departure adjustments and linear error of closure.
Map Scale Calculator
Convert between map measurement distance, real-world distance, and map scale ratios (e.g. 1:24,000).
Elevation, Grade & Slope Calculator
Calculate slope percentage, elevation rise/run angle in degrees, and topographic gradient.