Enter the magnitude of the charge, the strength of the electric field, viscosity of the medium and the Stoke’s radius into the calculator to determine the ion velocity.

## Ion Velocity Formula

The following equation is used to calculate the Ion Velocity.

Vi = (Z*e*E) / (6*pi*n*r)

• Where Vi is the ion velocity (m/s)
• Z is the magnitude of the charge
• e is the charge of one electron (C)
• E is the strength of the electric field (N/C)
• n is the viscosity of the medium (N*s/m^2)
• r is Stoke’s radius of charged molecules (in,m)

## What is an Ion Velocity?

Definition:

An ion velocity is a measure of the average speed of an ion within an electric field.