Magnetic calculator
Calculate the strength of a neodymium magnet from data on its shape, dimensions and material:
How does force calculation work?
The breakaway force can be calculated from the magnetic flux density on the surface of the magnet. However, these theoretical calculations often do not agree with experimental data. Our calculator is based on many measurements of a large number of magnets of various sizes. The strength of the other magnets is then calculated by interpolation between the already known measured magnets.
The indicated magnetic field is the magnetic flux density on the surface of the magnet in the centre of the wall on which the poles are located. It is fairly reliably calculated using proven formulas for calculating the intensity of the magnetic field around the magnet.
The calculator is designed to calculate the strength of standard neodymium magnets. It does not apply to ferrite magnets or pot magnets.
Will a 50 kg magnet hold a 50 kg object?
Under ideal conditions, yes, but realistically you have to allow for a large margin. The strength may decrease if the object is not pure steel, has a layer of other material on it (such as paint), has an uneven/curved surface, the magnet is pulled at an angle to the contact surface (not exactly in the magnetisation direction), the surface of the object is partially rusted or steel thickness is not sufficient.
We recommend choosing magnets with a higher breakaway force and before buying a larger quantity of magnets, test them under more difficult conditions.
More information can be found in the separate article What does the strength of a magnet in kg mean?
If you need advice on choosing, contact us at info@orodian.com or call +421 940 640 600. We can custom-make magnets of any size, which can be entered into our calculator.
