ECEF to LLA Converter Calculator & Formula

The ECEF to LLA Converter reverses the previous conversion, yielding geographic coordinates from Cartesian space. This transformation is indispensable for translating computed GNSS positions into latitude, longitude, and altitude. In this context, we will assume the WGS-84 ellipsoid is used (standard in GPS/GNSS).

GPS ECEF to LLA Converter Calculator

INPUTS:

• X = 1266346 meters
• Y = -4726067 meters
• Z = 4078050 meters

OUTPUTS:

• N = 6386976
• Longitude = - 74.99 degrees = ~ -75 degrees
• Latitude = 39.99 degrees = ~ 40 degrees
• Altitude = 100.42 meters = ~ 100 meters

Constants:

• Semi-major axis (a) = 6,378,137
• Eccentricity squared (e^2) = 0.00669438

GPS ECEF to LLA Converter Formula

Benefits/Applications

• Converts computed GNSS solutions into geographic formats for maps and interfaces.
• Supports geospatial analytics, mapping, and satellite tracking displays.
• Required for apps, visualizations, and reporting location data.

Summary: ECEF to LLA conversion makes raw GPS solution results meaningful to users, connecting machine computations to global geographic reference systems.