The Equatorial Radius of the Earth is 6,378,137.0 meters according to the WGS-84 earth datum. The data above is provided in meters. However, this can be automatically converted into other length and distance units via the pull-down menu.
The Mean Equatorial Radius is the average radius from the center of the Earth to the surface of the Earth at the Equator. Due to the spin of the Earth, there is a slighte equatorial bulge as a result of the centrifugal force outward from the spin to counter, albeit slighly, the Earth's gravity. Theis 20K meters less.
Enter these values into thecalculator to compute the volume of the Earth.