Convert Millihenry to Femtohenry
Type the number of millihenries that you wish to convert to femtohenries.
How to Convert Millihenries to Femtohenries
The millihenry and femtohenry are both units of inductance. By definition, 1 millihenry equals exactly 1e21 femtohenries. This means to convert millihenries to femtohenries, you multiply by 1e21.
Formula
Step-by-Step Example
Convert 5 mH to femtohenries:
We need to convert millihenries to femtohenries
Since 1 mH = 1e21 fH, multiply by 1e21
5 × 1e21 = 5e21
5 mH = 5e21 fH
Millihenry to Femtohenry Conversion Table
Quick reference table for common millihenry to femtohenry conversions. Click any value for detailed calculation.
| Millihenries (mH) | Femtohenries (fH) |
|---|---|
| 0.1 mH | 1e20 fH |
| 0.5 mH | 5e20 fH |
| 1 mH | 1e21 fH |
| 2 mH | 2e21 fH |
| 5 mH | 5e21 fH |
| 10 mH | 1e22 fH |
| 25 mH | 2.5e22 fH |
| 50 mH | 5e22 fH |
| 100 mH | 1e23 fH |
About These Units
Millihenry (mH)
A millihenry (mH) equals 0.001 henries or 1,000 microhenries. Common for power inductors (1-100 mH), audio crossover coils (0.1-10 mH), EMI filter chokes, and relay coils. Speaker crossover inductors typically range from 0.5-5 mH.
Femtohenry (fH)
A femtohenry (fH) equals 10⁻¹⁵ henries. Measures on-chip inductance in integrated circuits, interconnect inductance in advanced CMOS, and quantum circuit elements. Used in chip-scale inductor modeling and RF IC design at millimeter-wave frequencies.
Frequently Asked Questions
How do I convert millihenries to femtohenries?
To convert millihenries to femtohenries, multiply the value by 1e21. For example, 10 mH = 1e22 fH.
How many femtohenries are in 1 millihenry?
1 millihenry equals 1e21 femtohenries.
What is the formula for millihenries to femtohenries?
The formula is: fH = mH × 1e21.