Convert Millihenries to Femtohenries
Convert Millihenries (mH) to Femtohenries (fH) instantly and accurately.
Conversion Formula
fH = mH × 1000000000000
About Millihenries
The millihenry (mH) equals 10⁻³ H, the scale for audio-frequency transformers, relay coils, and resonant filter inductors. Telephone voice-frequency transformers use 10-200 mH; relays and solenoids have coil inductances of 1-100 mH; tunable AM IF transformers operate at 200-500 mH; loudspeaker crossover inductors (2-8 kHz) are typically 0.5-5 mH. 1 mH = 10⁻³ H = 10³ µH.
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
| Millihenries (mH) | Femtohenries (fH) |
|---|---|
| 1 mH | 1 × 1012 fH |
| 2 mH | 2 × 1012 fH |
| 5 mH | 5 × 1012 fH |
| 10 mH | 1 × 1013 fH |
| 25 mH | 2.5 × 1013 fH |
| 50 mH | 5 × 1013 fH |
| 100 mH | 1 × 1014 fH |