These calculators can be used to generate data using radius and gravity.

Solo gravity is the part of what we now call gravity that is based solely on the radius. The other part of gravity is the charge field which works against solo gravity and is based on density.

For more information you can read read this paper by Miles Mathis.

Calculate the gravity given the radius.

g = Esr/Er

Calculate the radius given the gravity.

r = gEr/Eg