Millihertz is 0.001 hertz units.
Millihertz to Attohertz Converter — mHz to aHz
Convert Millihertz (mHz) to Attohertz (aHz) using the exact conversion factor (1 millihertz = 1e+15 attohertz). See the formula, worked examples, and conversion table.
Millihertz to Attohertz 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.
Attohertz is 1e-18 hertz units.
Result = input x 0.001 / 1e-18.
Frequency units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Millihertz to Attohertz
Millihertz and Attohertz 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: Millihertz is 0.001 hertz units, and attohertz is 1e-18 hertz units.
Formula
attohertz = millihertz × 1e+15
This factor comes from each unit's defined relationship to the category's base unit: 1 millihertz equals 0.001 base units, and 1 attohertz equals 1e-18 base units, so dividing one by the other gives the direct millihertz-to-attohertz factor of 1e+15.
Simple example
1 mHz × 1e+15 = 1e+15 aHz
1 millihertz = 1e+15 attohertz.
Real-world example
10 mHz × 1e+15 = 1e+16 aHz
10 millihertz = 1e+16 attohertz.
Conversion table
| Millihertz (mHz) | Attohertz (aHz) |
|---|---|
| 0.001 mHz | 1,000,000,000,000 aHz |
| 0.01 mHz | 1e+13 aHz |
| 1 mHz | 1e+15 aHz |
| 10 mHz | 1e+16 aHz |
| 100 mHz | 1e+17 aHz |
| 1,000 mHz | 1e+18 aHz |
Reverse conversion: Attohertz to Millihertz
1e+15 aHz × 1e-15 = 1 mHz
1e+15 attohertz = 1 millihertz.
millihertz = attohertz × 1e-15
For a page dedicated to this direction, see Attohertz to Millihertz.
Understanding the Millihertz (mHz)
Millihertz is 0.001 hertz units.
Understanding the Attohertz (aHz)
Attohertz is 1e-18 hertz units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many attohertz are in 1 millihertz?
1 millihertz equals 1e+15 attohertz, using the exact defined conversion factor rather than an estimate.
How do I convert millihertz to attohertz?
Multiply the millihertz value by 1e+15. The converter above does this instantly to whatever precision you set.
How do I convert attohertz back to millihertz?
Use the reverse factor: 1 attohertz equals 1e-15 millihertz. You can also use the swap control in the converter above to flip the direction instantly.
What is a millihertz?
Millihertz (mHz) is a unit of scientific units.
What is a attohertz?
Attohertz (aHz) is a unit of scientific units.
Is the millihertz to attohertz conversion exact?
Yes. Both millihertz and attohertz are defined by fixed standards rather than physical artifacts, so the factor of 1e+15 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.