Free · Physics models
Linear Magnetic Permeability and Susceptibility
Convert between permeability, relative permeability and linear magnetic susceptibility.
- Formula & worked example
- Private in your browser
- No signup
Calculator inputs
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How to use this calculator
- Enter the known values in the units shown. Results update as you type.
- Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
- Use the worked example to check the method. Reset restores the starting fields.
Private by default
Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.
Formula and method
Relative permeability 2 corresponds to susceptibility 1 and conventional permeability 2.51327 µH/m.
μr = μ/μ0; χ = μr − 1.
Worked example
Enter these known values and leave the other values blank.
- Relative permeability
- 2
- Permeability
- 2.5133 μH / m
- Susceptibility
- 1
Assumptions and limitations
- Scalar linear response model; anisotropy, hysteresis, saturation and frequency dependence are omitted.
- The retained vacuum-permeability approximation is 4π × 10⁻⁷ H/m. Susceptibility can be negative down to −1.
- The separate material lookup is illustrative; its susceptibility depends on the material state.
- Enter known quantities and clear the unknown to use available inverse branches. Locks retain supplied values. Consistency messages cover fully visible equations; identities with hidden dependencies may require a manual consistency check. Preset values are illustrative approximations, and unit selectors preserve the underlying quantity.
Common questions
How do I solve for a different quantity?
Clear that quantity and supply enough independent known values. Some outputs are one-way or tied to a selected preset, so they cannot determine every input.
References
The calculation equations, inverse formulas, units, and input rules were imported from this source. Bookify provides the interface and equation solver.