Convert Millihenries per metre to Vacuum permeabilities
Convert Millihenries per metre (mH/m) to Vacuum permeabilities (µ₀) instantly and accurately.
Conversion Formula
µ₀ = mH/m × 795.7747155
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.
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.
Quick Reference Table
| Millihenries per metre (mH/m) | Vacuum permeabilities (µ₀) |
|---|---|
| 1 mH/m | 795.775 µ₀ |
| 2 mH/m | 1591.55 µ₀ |
| 5 mH/m | 3978.87 µ₀ |
| 10 mH/m | 7957.75 µ₀ |
| 25 mH/m | 19894.4 µ₀ |
| 50 mH/m | 39788.7 µ₀ |
| 100 mH/m | 79577.5 µ₀ |