Geoid Height Calculator

Calculating geoid height is crucial in various fields such as geodesy, surveying, and navigation. This calculator simplifies the process by providing an easy-to-use tool for determining geoid height based on latitude and longitude coordinates.

Formula: The formula to calculate geoid height is complex and typically involves spherical harmonic series. However, for this calculator, a simplified placeholder function is used.

How to use:

  1. Enter the latitude and longitude coordinates in degrees.
  2. Click on the “Calculate” button.
  3. The geoid height will be displayed in meters.

Example: Let’s say you want to find the geoid height for a location with latitude 40.7128 degrees and longitude -74.0060 degrees.

  • Enter 40.7128 in the Latitude field.
  • Enter -74.0060 in the Longitude field.
  • Click on the Calculate button.
  • The geoid height for the given coordinates will be displayed.


  1. What is geoid height?
    • Geoid height represents the height of the geoid above or below the reference ellipsoid at a particular location.
  2. Why is geoid height important?
    • Geoid height is essential for accurately determining elevations and vertical datums, especially in fields like surveying and geodesy.
  3. What are the units of geoid height?
    • Geoid height is typically measured in meters (m).
  4. How accurate is this calculator?
    • The accuracy of this calculator depends on the underlying algorithm used for geoid height calculation. For precise applications, it’s recommended to use specialized software or algorithms.
  5. Can I use this calculator for navigation purposes?
    • While this calculator provides an estimate of geoid height, it’s not intended for navigation purposes. For navigation, use dedicated GPS or GNSS devices.
  6. Does geoid height vary across the globe?
    • Yes, geoid height varies due to differences in gravity and topography across different regions of the Earth.
  7. Is geoid height the same as elevation?
    • No, geoid height and elevation are not the same. Geoid height represents the deviation of the geoid from the reference ellipsoid, while elevation refers to the height above a reference point, often sea level.
  8. How is geoid height measured?
    • Geoid height is determined through complex geodetic measurements and calculations involving gravity and topographical data.
  9. Can geoid height be negative?
    • Yes, geoid height can be negative if the geoid is below the reference ellipsoid, and positive if it’s above.
  10. Is geoid height constant at a specific location?
    • No, geoid height can vary over time due to changes in factors such as landmass distribution and gravitational anomalies.

Conclusion: The geoid height calculator simplifies the process of determining geoid height based on latitude and longitude coordinates. While it provides a useful estimate, users should be aware of its limitations and seek specialized tools for precise applications.