Magnetic Shield Calculator

A magnetic shield may be used to protect a device from an external source or to contain a source field emitted by an internal source. This calculator takes inputted properties of a magnetic shield to determine its effectiveness. To learn more about magnetic shielding, click here.

First, select which material you would like to calculate with, then select which variable you would like to solve for. Once you have made those selections, enter the values for the other variables. Solving for t will return the minimum thickness required to achieve the desired attenuation. Solving for D will return the maximum diameter that achieves the desired attenuation. Solving for H(o) will return the maximum magnetic field outside of the shield that still allows for the desired attenuated field. Solving for H(i) will return the magnetic field inside of the shield.

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This computes DC magnetic fields only. The field direction is transverse across the diameter of an infinitely long tube. Note: 1 Oersted (Oe) = 1 Gauss (G), in air.