Physics

Skin Depth Calculator

Find the skin depth of current in a conductor at high frequency.

Calculated Output

Skin depth 0.0001

Skin depth (µm) 65.234

Formula: δ = √(ρ ÷ (π·f·μ))

Step-by-Step Breakdown

1. Values used:

2. Resistivity = 0 Ω·m

3. Frequency = 1,000,000 Hz

4. Relative permeability = 1

6. Skin depth = 0.0001

7. Skin depth = 65.234µm

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The math behind it

δ = √(ρ ÷ (π·f·μ)). Current density falls to 1/e at this depth; higher frequency means thinner skin.

Copper at 1 MHz → about 65 µm.

Why use stranded/Litz wire?

It increases surface area to combat the skin effect at high frequency.