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Calculator for Skin Effect Depth

Calculates the effective skin depth (1/ε) for common conducting materials using the formula and data referenced below .


Resistivity (ρ):  x 10-8 Ω.m
 MHz   Relative Permeability (μr):   
Skin Effect Depth:    μm

Note: To use different values for the Resistivity and Relative Permeability, select Enter Data in the Conductor Material selection text box and then enter the required values in the boxes highlighted in amber.

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From Transmission Lines and Networks by Walter C. Johnson, McGraw-Hill 1963 p58.

Nominal depth of penetration for a conductor


[formula for skin depth]


ρ is the resistivity of the conductor in Ω.m

f is the frequency in Hertz

μ is the absolute magnetic permeability of the conductor

The absolute magnetic permeability (μ) = μo x μr

μo = 4π x 10-7 H/m

The values for μr are from Transmission Line Design Handbook by Brian C Wadell, Artech House 1991 Table 9.3.2 page 446.

The values for ρ are from CRC Handbook of Chemistry and Physics 1st Student Edition 1998 page F-88 and are for high purity elements at 20°C.

This calculator is provided free by Chemandy Electronics in order to promote the FLEXI-BOX

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