# Electric Current Density

Written by Jerry Ratzlaff on . Posted in Electrical Engineering

Current density, abbreviated as J, is the measure of current per unit of cross section.

## Current Density Formulas

 $$\large{ J = \frac{I}{A} }$$ $$\large{ J = \frac{ E }{ G } }$$

### Where:

 Units English SI $$\large{ J }$$ = current density $$\large{I\;R}$$ $$\large{V}$$ $$\large{ A }$$ = cross-section area of the conductor $$\large{in^2}$$ $$\large{m^2}$$ $$\large{ I }$$ = current through the conductor $$\large{\frac{V}{R}}$$ $$\large{I}$$ $$\large{ G }$$ = electric conductivity - $$\large{\frac{S}{m}}$$ $$\large{ E }$$ = electric field - $$\large{\frac{V}{m}}$$