Ring - Radially magnetized

Field as required in space


Radially magnetized

Calculation: Magnetic field Brad, Bz for adially magnetized ring. The field point may be located anywhere in the space. r / z coordinates relative to the centre of the magnet!
DIN code: The values can be taken from the material data sheets.

Ring - Radially magnetized

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Data input

Magnet material DIN
Materials information
Diameter D in mm
Inner diameter d in mm
Height c in mm
r in mm
z in mm



Brad in mT
Bz in mT
|B| in mT

Frequently asked questions

Below we answer frequently asked questions. If you have any further questions, please do not hesitate to contact us.

  • What can be calculated?

    The magnet calculator makes it possible to perform field calculations for linear, i.e. bipolar, magnetized, geometrical basic units. The following basic units are available: block, disk, ring. When performing the magnetic field calculation for an axial coordinate system, you can also calculate values for spheres and strip-type magnetic plates with a fixed pole distribution.

  • What is calculated?

    The magnetic induction (flux density) B is calculated in mT. The field strength H in kA/m can be determined using the formula H=0.796 B.

    Alongside the field strength, which is highly dependent on the start point for the measurement, the magnetic moment is also determined in 10-9 V s m and corresponds to the moment of a magnet with volume V=1 mm³ at polarization J=1000mT. This magnetic moment is independent of location and can be determined very precisely using a fluxmeter and a Helmholtz coil. It is therefore often used in the quality assurance process in order to characterize magnets. In real magnets, the field strength and moment may differ somewhat from the computed values due to tolerances, geometrical differences from the theoretical dimensions (e.g. chamfers, injection points) and surface effects.

  • Notes on magnetic field calculation on one axis

    Magnetic field calculation for a single axis:

    • One pole, i.e. in the direction of magnetization, is known as the principal axis as per Gauss.
    • The axis vertical to the direction of magnetization is the secondary axis as per Gauss.

    Please always specify the distance s as the distance from the surface of the magnet to the sensitive surface of an intended sensor!

  • Magnetic strength & DIN code

    The magnetic strength is calculated directly from the magnetic characteristics. These are the two characteristic values that you will find as DIN code in the material data sheet. For example, for Neofer 48/60p you enter the code 48 / 60.

  • Magnetic field calculation at any desired point in space

    Specify the three coordinates relative to the center of the magnet.

  • Review

    If the second value (coercive field) of the two characteristic values, which you get as DIN code in the material data sheet, is too low, i.e. the magnetization is not stable, a calculation is not possible and a warning is displayed. If the values match, a green OK field appears.

Question ? If you have any questions about our magnetic calculator or our products, we look forward to hearing from you.