Current Density Calculator

What is Current Density?

Current density is a measure of the electric current per unit area. It is defined as the electric current flowing through a unit cross-sectional area of a conductor. The standard unit of current density is amperes per square meter (A/m²).

How to Use This Calculator

1. Enter the current (I) in amperes (Amps)
2. Enter the cross-sectional area (A) in square millimeters (mm²)
3. Select the material (optional)
4. Click the "Calculate" button
5. The current density will be displayed in amperes per square meter (A/m²)

Applications of Current Density

Current density is an important parameter in electrical engineering and materials science. It's used to:

• Design electrical conductors to ensure they can handle the current without overheating
• Analyze the performance of electrical components
• Study the effects of electrical current on materials
• Determine the appropriate size of conductors for specific applications

Formula

J = I / A

Where:

• J = Current Density (A/m²)
• I = Current (Amps)
• A = Cross-sectional Area (m²)

Example

If a current of 5 Amps flows through a conductor with a cross-sectional area of 2 mm², the current density would be:

J = 5 A / (2 × 10⁻⁶ m²) = 2,500,000 A/m²