Nanohertz is 1e-9 hertz units.
Nanohertz to Millihertz Converter — nHz to mHz
Convert Nanohertz (nHz) to Millihertz (mHz) using the exact conversion factor (1 nanohertz = 0.000001 millihertz). See the formula, worked examples, and conversion table.
Nanohertz to Millihertz converter
Converter
Scientific Units Converter
Convert SI derived units, scientific notation-friendly units, atomic units, and lab measurements.
Context values
Some unit families need one extra value for a physically accurate result.
Millihertz is 0.001 hertz units.
Result = input x 1e-9 / 0.001.
Frequency units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Nanohertz to Millihertz
Nanohertz and Millihertz are both scientific-measurement units, spanning everything from atomic and laboratory scales to astronomical distances — the kind of conversion that comes up constantly in physics, chemistry, and astronomy when a result needs to move between conventions used in different subfields. Specifically: Nanohertz is 1e-9 hertz units, and millihertz is 0.001 hertz units.
Formula
millihertz = nanohertz × 0.000001
This factor comes from each unit's defined relationship to the category's base unit: 1 nanohertz equals 1e-9 base units, and 1 millihertz equals 0.001 base units, so dividing one by the other gives the direct nanohertz-to-millihertz factor of 0.000001.
Simple example
1 nHz × 0.000001 = 0.000001 mHz
1 nanohertz = 0.000001 millihertz.
Real-world example
10 nHz × 0.000001 = 0.00001 mHz
10 nanohertz = 0.00001 millihertz.
Conversion table
| Nanohertz (nHz) | Millihertz (mHz) |
|---|---|
| 0.001 nHz | 1e-9 mHz |
| 0.01 nHz | 1e-8 mHz |
| 1 nHz | 0.000001 mHz |
| 10 nHz | 0.00001 mHz |
| 100 nHz | 0.0001 mHz |
| 1,000 nHz | 0.001 mHz |
Reverse conversion: Millihertz to Nanohertz
0.000001 mHz × 1000000 = 1 nHz
0.000001 millihertz = 1 nanohertz.
nanohertz = millihertz × 1000000
For a page dedicated to this direction, see Millihertz to Nanohertz.
Understanding the Nanohertz (nHz)
Nanohertz is 1e-9 hertz units.
Understanding the Millihertz (mHz)
Millihertz is 0.001 hertz units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many millihertz are in 1 nanohertz?
1 nanohertz equals 0.000001 millihertz, using the exact defined conversion factor rather than an estimate.
How do I convert nanohertz to millihertz?
Multiply the nanohertz value by 0.000001. The converter above does this instantly to whatever precision you set.
How do I convert millihertz back to nanohertz?
Use the reverse factor: 1 millihertz equals 1,000,000 nanohertz. You can also use the swap control in the converter above to flip the direction instantly.
What is a nanohertz?
Nanohertz (nHz) is a unit of scientific units.
What is a millihertz?
Millihertz (mHz) is a unit of scientific units.
Is the nanohertz to millihertz conversion exact?
Yes. Both nanohertz and millihertz are defined by fixed standards rather than physical artifacts, so the factor of 0.000001 used above is exact to as many digits as you choose to display.
Why does this category span everything from atomic to astronomical scales?
Scientific work spans an enormous range of physical scales, from atomic distances (measured in angstroms or atomic mass units) to interstellar distances (measured in astronomical units or parsecs), so this category groups SI-derived and scale-specific units that researchers commonly need to convert between within their field.