Millihenry (mH)
The millihenry (mH) equals 0.001 henry — common for power inductors, chokes, and larger wound components.
Millihenries label power-supply inductors, filter chokes, and audio crossover coils.
Millihenry to Henry
Convert millihenry to henry instantly. Type in either field — results update live.
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inductance Millihenry Henry
1 millihenry = 0.001 henrys
Unit
Unit
Conversion table
Selected mH values converted to H using the exact factor from this tool.
| mH | H |
|---|---|
| 0.01 | 0.00001 |
| 0.1 | 0.0001 |
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 50 | 0.05 |
| 100 | 0.1 |
| 1,000 | 1 |
How to convert
Exact conversion factors in both directions, plus a worked example.
1 mH = 0.001 H
1 H = 1000 mH
To convert millihenry to henry, multiply by 0.001.
To convert henry to millihenry, multiply by 1000.
Example: convert 10 mH to H
10 × 0.001 = 0.01 H
About these units
Short background on the units used in this conversion.
Henry (H)
The henry (H) is the SI unit of inductance — one weber per ampere (Wb/A), the flux linkage per ampere of current.
Henries quantify inductor size in theory; practical inductors use millihenry, microhenry, and nanohenry.
Frequently asked questions
How many henrys are in one millihenry?
One millihenry equals 0.001 henrys. Multiply your millihenrys value by 0.001 to convert to henrys.
What is the conversion formula?
H = mH × 0.001The reverse is
mH = H × 1,000, using the same exact factors as this converter.Is this Millihenry to Henry converter private?
Yes. All calculations run locally in your browser. Nothing you type is sent to a server.