Magnetic Permeability Calculator
This magnetic permeability calculator (or simply permeability calculator) can obtain a material's permeability, relative permeability, and susceptibility from the relation between these parameters.
We paired this calculator with a short text describing:
- Differences between diamagnetic, paramagnetic, and ferromagnetic materials;
- The magnetic permeability formula;
- The relative permeability formula; and
- How to calculate magnetic permeability.
You can also use this tool as a magnetic susceptibility calculator! Keep reading to understand the relationship between the parameters used in this tool.
What is permeability?
Permeability, or magnetic permeability (not to be confused with a fluid's permeability), is a material's capacity to be affected by an applied magnetic field.
Its SI, International System of Units, unit is the henry per meter (H/m), and we refer to permeability by the letter .
According to this value, we can classify materials into three categories in relation to the permeability of free space :
- Paramagnetic. In the presence of an external magnetic field, these materials are magnetized and are attracted to the external magnetic field.
- Diamagnetic. Diamagnetic materials, in contrast, produce a magnetic field in opposition to the external magnetic field. Thus, they are repelled.
- Ferromagnetic. These materials can retain the magnetic field after the external magnetic field is removed and become permanent magnets.
🙋 The Lorentz force describes the interaction between a particle and the electric and magnetic fields. Read more about this in our Lorentz force and electric field of a point charge calculators!
How to calculate magnetic permeability ― magnetic permeability formula
Permeability expresses the ratio between the magnetic flux density and magnetic field strength:
- is the magnetic flux density; and
- is the magnetic field stregth.
We can also write permeability in terms of :
- is called relative permeability;
- is the permeability of free space; and
- is the material's permeability.
You can also input magnetic susceptibility in this magnetic permeability calculator. Both expressions are related by:
✅ Give it a try! Experiment with this permeability calculator to ensure you understand the subject.