# Current Density Calculator

If you determine the electrical current's density, then you can use our current density calculator.

In Physics, the **quantity of current** that is **able to move in per unit area of the conductor** is called **current density**. The symbol "J" is used to denote the current density. In other words, Current density is described as the movement of electrons in a conductor's per unit area. It is a vector quantity, and the SI unit to represent current density is Ampere/meter^{2}.

**Table of Contents**

## Formula of Current Density Calculator

To calculate current density instantly, you can use our calculator, or to find it manually, you can use the formula listed below:

J = I / A

**Where,**

J = Current Density

I = Current (measured in Ampere)

A = Area (measured in meters)

**Note:**

To calculate density, you can use our Density Calculator.

### Example

For a more transparent and precise understanding of a concept and to know how to find current density, let us have an example below:

Suppose a copper wire has an area of 20mm^{2}, whereas the flow of electrons is 10mA, then find the current density of a wire.

**Given data**

I = Current = 20mm^{2}= 20×10^{-3}m^{2}

A = Area = 10mA = 10×10^{-3}A

**To Find**

The current density of a wire = ?

**Solution**

To find out the current density of a wire, we will use the formula listed below:

J = I / A

Putting values in the formula:

J = (20×10^{-3}m^{2}) / (10×10^{-3}A) = 0.5 A/m^{2}

### How to use the Current Density Calculator?

The steps to use the current density calculator are as follows:

**Step 1: **Enter the value of a current in the first required input.

**Step 2: **Enter the value of the area in the second required input.

**Step 3: **The calculator will automatically display an answer on the screen.

### Calculator use

You can use our current density calculator in various science principles, such as; measuring the total circulation of current, and gas discharge lamps (where the output spectrum is created).