Convert Megahenries to Femtohenries
Convert Megahenries (MH) to Femtohenries (fH) instantly and accurately.
Conversion Formula
fH = MH × 1.000000000e+21
About Megahenries
The megahenry (MH) equals 10⁶ H, well beyond any practical wound inductor but arising in theoretical analysis of very large electromagnetic structures. Extremely long overhead transmission line sections have distributed inductance totalling megahenries; electromagnetic pulse (EMP) source models and magnetosphere inductance estimates use MH in theoretical contexts. 1 MH = 10³ kH = 10⁶ H.
About Femtohenries
The femtohenry (fH) equals 10⁻¹⁵ H, the scale for PCB via inductances, short bondwires, and on-chip spiral inductor parasitics in millimetre-wave design. A 0.5 mm gold bondwire has about 0.5-1 fH inductance at mm-wave frequencies; differential pair stubs in 100 GHz SerDes are modelled in femtohenries; Josephson junction loop inductances in superconducting circuits are a few hundred fH. 1 fH = 10⁻³ pH = 10⁻¹⁵ H.
Quick Reference Table
| Megahenries (MH) | Femtohenries (fH) |
|---|---|
| 1 MH | 1 × 1021 fH |
| 2 MH | 2 × 1021 fH |
| 5 MH | 5 × 1021 fH |
| 10 MH | 1 × 1022 fH |
| 25 MH | 2.5 × 1022 fH |
| 50 MH | 5 × 1022 fH |
| 100 MH | 1 × 1023 fH |