maratoolHow to convert henries, mH, and µH inductor values
Type an inductance — read H, mH, µH, or nH instantly.
Power inductors are marked in µH, chokes in mH, and parasitics estimated in nH. The Inductance Converter keeps the prefix ladder straight.
How it works
- Pick units — "Millihenry (mH)" to "Microhenry (µH)", or any other pair.
- Type a value — the result updates as you type, with swap and copy.
- Copy — one click, with "Copied!" feedback.
Inductance conversion factors
Every unit converts through the henry (the base unit). To convert A → B, multiply by A's factor and divide by B's:
| Unit | = this many henrys |
|---|---|
| Kilohenry (kH) | 1,000 |
| Henry (H) | 1 |
| Millihenry (mH) | 0.001 |
| Microhenry (µH) | 1.0000 × 10^-6 |
| Nanohenry (nH) | 1.0000 × 10^-9 |
| Abhenry (abH) | 1.0000 × 10^-9 |
| Stathenry (statH) | 8.9876 × 10^11 |
When you need it
Reference values: a PCB via is ~1 nH, a buck converter coil 2.2–47 µH, a mains filter choke 1–10 mH. Resonance moves fast with prefix errors — L and C swap factors of 1,000 shift an LC filter by ~32×.
Sources & methodology
Conversion factors follow NIST Special Publication 811; exact-by-definition factors are marked in the tool itself. All math runs client-side in your browser — nothing is uploaded.
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