Permeability

Electromagnetism and formation of magnetic fields. Calculate permeability and relative permeability of materials.

Permeability Calculator

Permeability is the ability to support formation of magnetic fields in a material.

Relative Permeability: µᵣ = µ / µ₀

where:

Calculator

Permeability (µ) (H/m)

Relative Permeability (µᵣ)-- dimensionless

Medium	Permeability (H/m)	Relative Permeability (µᵣ)
Air	1.25663753×10⁻⁶	1.00000037
Aluminum	1.256665×10⁻⁶	1.000022
Austenitic stainless steel	1.260×10⁻⁶ – 8.8×10⁻⁶	1.003 – 7
Bismuth	1.25643×10⁻⁶	0.999834
Carbon Steel	1.26×10⁻⁴	100
Cobalt-Iron	2.3×10⁻²	18000
Copper	1.256629×10⁻⁶	0.999994
Ferrite (nickel zinc)	2.0×10⁻⁵ – 8.0×10⁻⁴	16 – 640
Ferritic stainless steel	1.26×10⁻³ – 2.26×10⁻³	1000 – 1800
Hydrogen	1.2566371×10⁻⁶	1
Iron (99.8% pure)	6.3×10⁻³	5000
Iron (99.95% pure, annealed)	2.5×10⁻¹	200000
Martensitic stainless steel (annealed)	9.42×10⁻⁴ – 1.19×10⁻³	750 – 950
Martensitic stainless steel (hardened)	5.0×10⁻⁵ – 1.2×10⁻⁴	40 – 95
Nanoperm	1.0×10⁻¹	80000
Neodymium magnet	1.32×10⁻⁶	1.05
Nickel	1.26×10⁻⁴ – 7.54×10⁻⁴	100 – 600
Permalloy	1.0×10⁻²	8000
Platinum	1.256970×10⁻⁶	1.000265
Sapphire	1.2566368×10⁻⁶	0.99999976
Superconductors	0	0
Teflon	1.2567×10⁻⁶	1
Vacuum (µ₀)	4π × 10⁻⁷	1
Water	1.256627×10⁻⁶	0.999992
Wood	1.25663760×10⁻⁶	1.00000043