To convert nanohenries to henries, multiply by 1e-09. That factor is the whole relationship: both units measure how strongly a coil opposes a change in current, so the conversion is a proportion with no offset and no substance-specific constant.
The henry is the SI unit of inductance: one volt induced per amp-per-second change in current. One nano henry is one billionth of a henry (1e-9 henries).
The tables underneath give both a plain step-by-step lookup and a list of real quantities expressed in henries, so you can sanity-check whether your answer is a plausible size.
The formula
nanohenries- The amount you are converting, in nanohenries
1e-09- The exact number of henries in one nanohenry
henries- The converted result
How it works, step by step
- Enter the value in nanohenries.
- It is multiplied by 1e-09, the exact factor between the two units.
- The answer is shown in henries, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
Buck converter inductor: 4.7e+04 nH in henries
At 4.7e+04 nH (buck converter inductor), the same quantity in henries is 4.7e+04 × 1e-09 = 4.7e-05 H. One nanohenry is 1e-09 henries, so the numbers shrink as expected.
Speaker crossover coil: 1.5e+06 nH in henries
Take speaker crossover coil, roughly 1.5e+06 nH. The conversion is a single multiplication — 1.5e+06 × 1e-09 — giving 0.0015 H. Because the relationship is proportional, doubling the input doubles the answer to 0.003 H.
How to read your score
Frequently asked questions
How many henries are in one nanohenry?
Exactly 1e-09. 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 henries?
henries = nanohenries × 1e-09. Reversed, nanohenries = henries ÷ 1e-09, which is the same as multiplying by 1,000,000,000.
Which is the bigger unit, the nanohenry or the henry?
The henry. One nanohenry is only 1e-09 of a henry, so it takes 1e+09 nanohenries to make one henry.
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 henry?
The henry is the SI unit of inductance: one volt induced per amp-per-second change in current.
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 henries reference tables
| Nanohenries | Henries |
|---|---|
| 0.5 nH | 5.00000e-10 H |
| 1 nH | 1e-09 H |
| 2 nH | 2e-09 H |
| 3 nH | 3e-09 H |
| 5 nH | 5e-09 H |
| 10 nH | 1e-08 H |
| 20 nH | 2e-08 H |
| 25 nH | 2.5e-08 H |
| 50 nH | 5e-08 H |
| 75 nH | 7.5e-08 H |
| 100 nH | 1e-07 H |
| 250 nH | 2.5e-07 H |
| 500 nH | 5e-07 H |
| 1000 nH | 1e-06 H |
| 5000 nH | 5e-06 H |
Exact factor: 1 nanohenry = 1e-09 henries.
| Quantity | nH | H |
|---|---|---|
| PCB trace, 25 mm | 20 nH | 2e-08 H |
| RF choke | 1e+04 nH | 1e-05 H |
| Buck converter inductor | 4.7e+04 nH | 4.7e-05 H |
| Speaker crossover coil | 1.5e+06 nH | 0.0015 H |
| Relay coil | 1e+08 nH | 0.1 H |
| Mains transformer primary | 5e+09 nH | 5 H |
Published reference values, converted with the same factor this page uses.