The magnetic performance of finished magnets, including surface magnetic flux density, magnetic moment, and pull force, is closely related to the magnetic properties of the material. However, material data alone cannot determine the actual performance of finished magnets. Magnet shape, dimensions, magnetization direction, working distance, and surrounding magnetic circuit can all affect the results.
The magnet calculators below provide preliminary estimates for common magnet shapes under defined calculation conditions.
Note: These online magnet calculators provide preliminary estimates based on defined assumptions and calculation conditions. Actual performance may vary due to magnet tolerances, temperature, air gaps, mating components, surface conditions, assembly structure, and other application factors. Calculation results should not be used as the sole basis for design decisions, and magnets should be tested under actual operating conditions.
Magnetic material properties provide the basis for calculating the performance of finished magnets. Remanence influences the magnetic flux that magnets can produce, while the demagnetization curve describes how materials behave under different magnetic circuit conditions.
Magnet geometry and magnetization direction then determine how these material properties are expressed in finished magnets. Magnets made from the same material can have different surface magnetic flux densities, magnetic moments, permeance coefficients, and pull forces because of differences in shape, dimensions, and magnetization direction.
Application conditions introduce further variables. Working distance, air gaps, the magnetic properties and thickness of mating materials, contact conditions, surrounding magnetic components, and load direction can all affect actual performance. Calculator results should therefore be treated as preliminary design values rather than guaranteed application results.
Online magnet calculators are most useful for regular magnet shapes, clearly defined magnetization directions, and simplified calculation conditions. They are less suitable for designs involving complex geometries, multipole magnetization, magnet arrays, magnetic assemblies, or significant interaction with surrounding magnetic components.
More detailed analysis may also be required when projects involve off-axis magnetic fields, force across changing air gaps, force-distance curves, torque, misalignment, magnetic saturation, or several magnets and mating components working together. These conditions cannot always be represented accurately by simplified analytical formulas.
Finite element analysis can be used to evaluate magnetic field distribution, force, torque, and magnetic circuit behavior under more realistic operating conditions. Calculated results should still be supported by prototype testing when final performance depends on material tolerances, assembly variation, temperature, or actual installation conditions.
Need help with magnet calculations or a more complex magnetic design? Contact us to discuss your requirements, operating conditions, and expected performance.
