Magnetic Permeability Converter

Convert between all magnetic permeability units instantly. Select your units from the dropdowns below and enter a value to see the conversion in real-time.

SI unit: henry per metre (H/m)

Conversion Formula

About Magnetic Permeability Units

Common Magnetic Permeability Conversions

• 1 H/m = 10⁶ µH/m = 10³ mH/m (SI prefix conversions)
• µ₀ = 4π × 10^-7 H/m ≈ 1.25664 µH/m (vacuum permeability)
• 1 H/m ≈ 7.958 × 10⁵ µ₀ (expressed in units of µ₀)
• Vacuum / air / most plastics: µ_r ≈ 1, µ ≈ 1.257 µH/m
• Paramagnetic Al: µ_r = 1.0000220, µ ≈ µ₀ + 28 nH/m
• Silicon steel (CRGO): µ_r ≈ 1 000-10 000, µ ≈ 1.3-13 mH/m
• Permalloy (Ni₇₈Fe₂₂): µ_r up to ~100 000, µ up to ~126 mH/m
• Mu-metal (annealed): µ_r up to ~300 000, µ up to ~0.38 H/m
• Supermalloy (optimal): µ_r up to ~10⁶, µ up to ~1.26 H/m

Direct Converters