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Inductance Converter

Convert inductance between henries, millihenries, microhenries, nanohenries and other units, including abhenries and stathenries.

What this tool does

Convert inductance between henries, millihenries, microhenries, nanohenries and other units, including abhenries and stathenries. Type an amount in henries, choose the units, and the tool converts it to millihenries. It offers 11 inductance units and also shows the same amount in the others.

Inputs

  • Value: A number.
  • From: Choose one from 11 options, including Terahenry, Gigahenry, Megahenry, Kilohenry, Henry, Millihenry. Starts as Henry.
  • To: Choose one of the same 11 units as "From". Starts as Millihenry.

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount and the same amount in the other units. It appears once every required field has a valid value.

Worked examples

Conversions from henries to millihenries:

  • 1 H = 1,000 mH
  • 5 H = 5,000 mH
  • 10 H = 10,000 mH
  • 50 H = 50,000 mH
  • 100 H = 100,000 mH

Multiply the number of henries by 1,000 to get millihenries. Both units are exact definitions, so 1,000 is the exact factor: 1 H = 1,000 mH.

Sources: Henry: SI Brochure, 9th edition (2019). Millihenry: SI Brochure, 9th edition (2019, updated 2022), Table 7 (SI prefixes).

Limitations

  • Converts the unit of an inductance only. It does not work out inductance from coil turns, core or geometry, and it does not combine inductors in series or parallel.
  • Abhenry and stathenry are historical CGS units, listed for completeness.

FAQs

Q: How many millihenries is one henry?
A: One henry is 1,000 millihenries. Pick henry as the From unit and millihenry as the To unit to see it for any value.
Q: What are abhenries and stathenries?
A: They are the inductance units of the older CGS electromagnetic and electrostatic systems. One abhenry is exactly 1 nanohenry (10⁻⁹ H). One stathenry is about 8.9876 × 10¹¹ henries.
Q: Can I convert from microhenries to henries?
A: Yes. Choose microhenry in the From box and henry in the To box.

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