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

Calculate the **force** given two **charge**es and a **radius**.

F = kQq/r^{2}

Calculate the first **charge** given the second **charge**, **force** and **radius**.

M = Fr^{2}/Gm

Calculate the second **charge** given the first **charge**, **force** and **radius**.

q = Fr^{2}/kQ

Calculate the **radius** given the **charge**es and **force**.

r = √[kQq/F]