WGS-84 Earth flattening factor

This is the first flattening factor of the Earth ellipsoid in the WGS-84 reference system. It describes the measure of compression of the polar radius compared to the Equatorial radius. This is a ratio - a unitless number.

The flattening factor is computed as a function of the Earth's Polar Radius and the Earth's Equatorial Radius as follows:

1. Er = 6378137.0 m // Earth WGS-84 Equatorial radius in meters
2. Pr = 6356752.31424518 m  // Earth WGS-84 Polar radius in meters
3. F = (Er - Pr)/Er   // flattening factor 

Oblate Spheroid Calculators and Data

• Earth WGS-84 Equatorial radius in meters: 6378137.0 m
• Earth WGS-84 Polar radius in meters: 6356752.31424518 m 
• Earth Flattening Factor (WGS-84): 0.00335281066474748071984552861852
• Ellipse flattening factor: F = (Er - Pr)/Er  
• Geocentric to Geodetic Latitude
• Geodetic to Geocentric Latitude
• Slant Range

Earth Model Calculators

• Slant Range using Position Vectors
• Slant Range from Elevation Angle (α)
• Slant Range using Subtended Angle (β)
• Distance to Horizon
• Angle of Satellite Visibility
• Grazing Angle
• XYZ to Latitude, Longitude, Altitude
• Earth WGS-84 Equatorial radius in meters: 6378137.0 m
• Earth WGS-84 Polar radius in meters: 6356752.31424518 m 
• Earth Flattening Factor (WGS-84): 0.00335281066474748071984552861852
• Ellipse flattening factor: F = (Er - Pr)/Er  
• Geocentric to Geodetic Latitude
• Geodetic to Geocentric Latitude