Convert Vacuum permeabilities to Millihenries per metre
Convert Vacuum permeabilities (µ₀) to Millihenries per metre (mH/m) instantly and accurately.
Conversion Formula
mH/m = µ₀ × 0.001256637061
About Vacuum permeabilities
The vacuum permeability (µ₀), also called the magnetic constant, equals 4π × 10⁻⁷ H/m ≈ 1.25664 µH/m. In the 2019 SI it is experimentally determined: µ₀ = 1.25663706212(19) × 10⁻⁶ H/m. The absolute permeability of any material is µ = µᵣ × µ₀. 1 µ₀ = 4π × 10⁻⁷ H/m.
About Millihenries per metre
The millihenry per metre (mH/m) equals 10⁻³ H/m ≈ 796 µ₀. The range for soft magnetic materials: grain-oriented silicon steel (CRGO) has µ ≈ 1-10 mH/m at working flux densities (µᵣ ≈ 1 000-8 000); MnZn power ferrites are 3-10 mH/m; nickel-iron alloys (Permalloy 78) reach 25-100 mH/m at low fields. 1 mH/m = 10⁻³ H/m.
Quick Reference Table
| Vacuum permeabilities (µ₀) | Millihenries per metre (mH/m) |
|---|---|
| 1 µ₀ | 0.00125664 mH/m |
| 2 µ₀ | 0.00251327 mH/m |
| 5 µ₀ | 0.00628319 mH/m |
| 10 µ₀ | 0.0125664 mH/m |
| 25 µ₀ | 0.0314159 mH/m |
| 50 µ₀ | 0.0628319 mH/m |
| 100 µ₀ | 0.125664 mH/m |