These calculators can be used to generate data using **density**, **radius** and **charge**.

The charge field, as expressed by these equations, is the surface charge vector of a body with the given radius and density. The values are negative relative to the solo gravity vector for the body. Where solo gravity points in, towards the body, the charge vector points out.

Calculate the **charge** given the **density** and **radius**.

e = E_{e}d^{2}r^{3}/E_{d}^{2}E_{r}^{3}

Calculate the **density** given the **radius** and **charge**.

d = √[eE_{d}^{2}E_{r}^{3}/E_{e}r^{3}]

Calculate the **radius** given the **density** and **charge**.

r = ∛[eE_{d}^{2}E_{r}^{3}/E_{e}d^{2}]