Current Density Calculator Formula
Understand the math behind the current density calculator. Each variable explained with a worked example.
Formulas Used
Current Density
current_density = current / (area * 1e-6)Current Density
current_density_amm2 = current / areaVariables
| Variable | Description | Default |
|---|---|---|
current | Current(A) | 10 |
area | Cross-Sectional Area(mm²) | 2.5 |
How It Works
Current Density
Current density describes how much current flows through a unit area of a conductor.
Formula
J = I / A
where I is the current and A is the cross-sectional area of the conductor. High current density causes excessive heating.
Worked Example
10 A through a wire with 2.5 mm² cross-section.
current = 10area = 2.5
- 01J = I / A
- 02J = 10 / 2.5 mm²
- 03J = 4 A/mm²
- 04J = 4,000,000 A/m²
Ready to run the numbers?
Open Current Density Calculator