This page converts nanohenries into millihenries using the factor 1e-06, and shows the reverse figure alongside it. Both units measure how strongly a coil opposes a change in current, which is why one number does the whole job.
One nano henry is one billionth of a henry (1e-9 henries). Millihenries cover audio crossovers, relay coils and the smoothing chokes in linear supplies.
Below the calculator there is a step table for the values people look up most, and a second table putting real how strongly a coil opposes a change in current figures into millihenries so the number you get has something to be compared against.
The formula
nanohenries- The amount you are converting, in nanohenries
1e-06- The exact number of millihenries in one nanohenry
millihenries- The converted result
How it works, step by step
- Enter the value in nanohenries.
- It is multiplied by 1e-06, the exact factor between the two units.
- The answer is shown in millihenries, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
Speaker crossover coil: 1.5e+06 nH in millihenries
Speaker crossover coil comes to about 1.5e+06 nH. Multiplying by the factor: 1.5e+06 × 1e-06 = 1.5 mH. Dividing the answer back by 1e-06 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
Buck converter inductor: 4.7e+04 nH in millihenries
At 4.7e+04 nH (buck converter inductor), the same quantity in millihenries is 4.7e+04 × 1e-06 = 0.047 mH. One nanohenry is 1e-06 millihenries, so the numbers shrink as expected.
How to read your score
Frequently asked questions
How many millihenries are in one nanohenry?
Exactly 1e-06. Every figure on this page is that one number multiplied by your input, so the only rounding is at the display step.
What is the formula to convert nanohenries to millihenries?
millihenries = nanohenries × 1e-06. Reversed, nanohenries = millihenries ÷ 1e-06, which is the same as multiplying by 1,000,000.
Which is the bigger unit, the nanohenry or the millihenry?
The millihenry. One nanohenry is only 1e-06 of a millihenry, so it takes 1e+06 nanohenries to make one millihenry.
What does this quantity actually measure?
Both units measure how strongly a coil opposes a change in current. That is why a single factor is enough: there is no temperature offset and no material property involved, unlike conversions that cross between different quantities.
What is a nanohenry?
One nano henry is one billionth of a henry (1e-9 henries).
What is a millihenry?
Millihenries cover audio crossovers, relay coils and the smoothing chokes in linear supplies.
Why does my answer differ from another converter?
Almost always because the other tool rounded the factor before multiplying. This page keeps full double precision through the calculation and rounds only for display, and it prints the factor it used so you can see where any difference came from.
Nanohenries to millihenries reference tables
| Nanohenries | Millihenries |
|---|---|
| 0.5 nH | 5e-07 mH |
| 1 nH | 1e-06 mH |
| 2 nH | 2e-06 mH |
| 3 nH | 3e-06 mH |
| 5 nH | 5e-06 mH |
| 10 nH | 1e-05 mH |
| 20 nH | 2e-05 mH |
| 25 nH | 2.5e-05 mH |
| 50 nH | 5e-05 mH |
| 75 nH | 7.5e-05 mH |
| 100 nH | 0.0001 mH |
| 250 nH | 0.00025 mH |
| 500 nH | 0.0005 mH |
| 1000 nH | 0.001 mH |
| 5000 nH | 0.005 mH |
Exact factor: 1 nanohenry = 1e-06 millihenries.
| Quantity | nH | mH |
|---|---|---|
| PCB trace, 25 mm | 20 nH | 2e-05 mH |
| RF choke | 1e+04 nH | 0.01 mH |
| Buck converter inductor | 4.7e+04 nH | 0.047 mH |
| Speaker crossover coil | 1.5e+06 nH | 1.5 mH |
| Relay coil | 1e+08 nH | 100 mH |
| Mains transformer primary | 5e+09 nH | 5000 mH |
Published reference values, converted with the same factor this page uses.