Convert Vacuum permeabilities to Femtohenries per metre
Convert Vacuum permeabilities (µ₀) to Femtohenries per metre (fH/m) instantly and accurately.
Conversion Formula
fH/m = µ₀ × 1256637061
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 Femtohenries per metre
The femtohenry per metre (fH/m) equals 10⁻¹⁵ H/m. A theoretical subunit used in precision electromagnetic metrology. Even the extreme diamagnet bismuth (µᵣ = 0.999834) departs from µ₀ by about −207 nH/m - far above the fH/m scale. Primarily a reference unit for quantum EM standard calculations. 1 fH/m = 10⁻¹⁵ H/m.
Quick Reference Table
| Vacuum permeabilities (µ₀) | Femtohenries per metre (fH/m) |
|---|---|
| 1 µ₀ | 1.257 × 109 fH/m |
| 2 µ₀ | 2.513 × 109 fH/m |
| 5 µ₀ | 6.283 × 109 fH/m |
| 10 µ₀ | 1.257 × 1010 fH/m |
| 25 µ₀ | 3.142 × 1010 fH/m |
| 50 µ₀ | 6.283 × 1010 fH/m |
| 100 µ₀ | 1.257 × 1011 fH/m |