Convert H to mH
Input the number of henries you want to convert to millihenries.
How to Convert Henries to Millihenries
The henry and millihenry are both units of inductance. By definition, 1 millihenry equals exactly 1000000 henries. This means to convert henries to millihenries, you divide by 1000000.
Formula
Step-by-Step Example
Convert 5 H to millihenries:
We need to convert henries to millihenries
Since 1 mH = 1000000 H, divide by 1000000
5 ÷ 1000000 = 5e-6
5 H = 5e-6 mH
Henry to Millihenry Conversion Table
Quick reference table for common henry to millihenry conversions. Click any value for detailed calculation.
| Henries (H) | Millihenries (mH) |
|---|---|
| 0.1 H | 1e-7 mH |
| 0.5 H | 5e-7 mH |
| 1 H | 1e-6 mH |
| 2 H | 2e-6 mH |
| 5 H | 5e-6 mH |
| 10 H | 1e-5 mH |
| 25 H | 2.5e-5 mH |
| 50 H | 5e-5 mH |
| 100 H | 0.0001 mH |
About These Units
Henry (H)
The henry (H) is the SI unit of electrical inductance—one henry induces 1 volt when current changes at 1 ampere per second. Large transformers and chokes range from 0.1-10 H. Car ignition coils: 3-8 H. Named after American scientist Joseph Henry. Formula: V = L × di/dt.
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.
Frequently Asked Questions
How do I convert henries to millihenries?
To convert henries to millihenries, divide the value by 1000000. For example, 10 H = 1e-5 mH.
How many millihenries are in 1 henry?
1 henry equals 1e-6 millihenries.
What is the formula for henries to millihenries?
The formula is: mH = H ÷ 1000000.