# Henries to Millihenries Converter

Enter the electrical inductance in henries below to get the value converted to millihenries.

## Result in Millihenries:

1 H = 1,000 mH

Do you want to convert millihenries to henries?

## How to Convert Henries to Millihenries

To convert a measurement in henries to a measurement in millihenries, multiply the electrical inductance by the following conversion ratio: 1,000 millihenries/henry.

Since one henry is equal to 1,000 millihenries, you can use this simple formula to convert:

millihenries = henries × 1,000

The electrical inductance in millihenries is equal to the electrical inductance in henries multiplied by 1,000.

For example, here's how to convert 5 henries to millihenries using the formula above.
millihenries = (5 H × 1,000) = 5,000 mH

### How Many Millihenries Are in a Henry?

There are 1,000 millihenries in a henry, which is why we use this value in the formula above.

1 H = 1,000 mH

## What Is a Henry?

One henry is equal to the inductance of a conductor in which there is one volt of electromotive force when the current through the conductor is increased by one ampere per second.[1]

The henry is the SI derived unit for electrical inductance in the metric system. Henries can be abbreviated as H; for example, 1 henry can be written as 1 H.

The National Institute of Standards and Technology recommends using "henries" as the plural form of the unit, however the usage of "henrys" is also common.[2]

## What Is a Millihenry?

One millihenry is equal to 1/1,000 of a henry, which is the inductance of a conductor with one volt of electromotive force when the current is increased by one ampere per second.

The millihenry is a multiple of the henry, which is the SI derived unit for electrical inductance. In the metric system, "milli" is the prefix for thousandths, or 10-3. Millihenries can be abbreviated as mH; for example, 1 millihenry can be written as 1 mH.

## Henry to Millihenry Conversion Table

Table showing various henry measurements converted to millihenries.
Henries Millihenries
0.001 H 1 mH
0.002 H 2 mH
0.003 H 3 mH
0.004 H 4 mH
0.005 H 5 mH
0.006 H 6 mH
0.007 H 7 mH
0.008 H 8 mH
0.009 H 9 mH
0.01 H 10 mH
0.02 H 20 mH
0.03 H 30 mH
0.04 H 40 mH
0.05 H 50 mH
0.06 H 60 mH
0.07 H 70 mH
0.08 H 80 mH
0.09 H 90 mH
0.1 H 100 mH
0.2 H 200 mH
0.3 H 300 mH
0.4 H 400 mH
0.5 H 500 mH
0.6 H 600 mH
0.7 H 700 mH
0.8 H 800 mH
0.9 H 900 mH
1 H 1,000 mH

## References

1. International Bureau of Weights and Measures, The International System of Units, 9th Edition, 2019, https://www.bipm.org/documents/20126/41483022/SI-Brochure-9-EN.pdf
2. Ambler Thompson and Barry N. Taylor, Guide for the Use of the International System of Units (SI), National Institute of Standards and Technology, https://physics.nist.gov/cuu/pdf/sp811.pdf