Skin Depth Calculator
Calculate electromagnetic skin depth in conductors
About Skin Depth
Skin depth is the distance at which electromagnetic wave amplitude decreases to 1/e (37%) of its surface value. At high frequencies, current flows mainly in a thin surface layer.
Key Formulas:
- δ = √(2/(ωμσ))
- Rs = 1/(σδ) = √(ωμ/(2σ))
- J(x) = J₀ × e^(-x/δ)
- δ ∝ 1/√f (skin depth decreases with frequency)
Practical Effects:
- Higher AC resistance than DC
- Litz wire for RF applications
- EM shielding effectiveness
- Induction heating depth