Convert Femtohenries per metre to Vacuum permeabilities
Convert Femtohenries per metre (fH/m) to Vacuum permeabilities (µ₀) instantly and accurately.
Conversion Formula
µ₀ = fH/m × 7.957747155e-10
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.
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
| Femtohenries per metre (fH/m) | Vacuum permeabilities (µ₀) |
|---|---|
| 1 fH/m | 7.958 × 10-10 µ₀ |
| 2 fH/m | 1.592 × 10-9 µ₀ |
| 5 fH/m | 3.979 × 10-9 µ₀ |
| 10 fH/m | 7.958 × 10-9 µ₀ |
| 25 fH/m | 1.989 × 10-8 µ₀ |
| 50 fH/m | 3.979 × 10-8 µ₀ |
| 100 fH/m | 7.958 × 10-8 µ₀ |