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Field Calculations for a Rectangle



Calculates the field strength of a rectangular magnet at any given X, Y, and Z Position

Fill in all of the black-outlined boxes, and the results will appear in the light-gray boxes. Units may be selected as either CGS (Gauss, in.) or SI (mTesla, mm). The required geometrical inputs are defined in the diagram. The origin is located at the center of the pole face, and the X, Y, and Z positions of interest are relative to this origin.

This calculation works best with magnetic materials displaying "straight line" demagnetization curves.
Unit System
Length (L) [inches]
Width (W) [inches]
Thickness (T) [inches]
Residual induction (Br) [G]
X position [inches]
Y position [inches]
Z position [inches]
Material type
Results
X field component [G]
Y field component [G]
Z field component [G]
Field magnitude (Bm) [G]

The above calculation is for reference only and Dexter Magnetic Technologies Inc. will not be held liable for its use. Please contact us for specific assistance should you require it.