Convert Vacuum permeabilities to Henries per metre
Convert Vacuum permeabilities (µ₀) to Henries per metre (H/m) instantly and accurately.
Conversion Formula
H/m = µ₀ × 1.256637061e-6
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 Henries per metre
The henry per metre (H/m) is the SI coherent unit of absolute magnetic permeability, equal to 1 kg·m·s⁻²·A⁻². Only the highest-permeability alloys reach this scale: annealed Mu-metal achieves µ ≈ 0.1-0.4 H/m (µᵣ up to 300 000); Supermalloy under optimal conditions approaches µ ≈ 1 H/m (µᵣ ≈ 10⁶). 1 H/m ≈ 7.96 × 10⁵ µ₀.
Quick Reference Table
| Vacuum permeabilities (µ₀) | Henries per metre (H/m) |
|---|---|
| 1 µ₀ | 1.257 × 10-6 H/m |
| 2 µ₀ | 2.513 × 10-6 H/m |
| 5 µ₀ | 6.283 × 10-6 H/m |
| 10 µ₀ | 1.257 × 10-5 H/m |
| 25 µ₀ | 3.142 × 10-5 H/m |
| 50 µ₀ | 6.283 × 10-5 H/m |
| 100 µ₀ | 0.000125664 H/m |