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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. 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.

Residual Induction (Br) data is on our magnet material pages.