Megahertz is 1000000 hertz units.
Megahertz to Millihertz Converter — MHz to mHz
Convert Megahertz (MHz) to Millihertz (mHz) using the exact conversion factor (1 megahertz = 1,000,000,000 millihertz). See the formula, worked examples, and conversion table.
Megahertz 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+6 / 0.001.
Frequency units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Megahertz to Millihertz
Megahertz 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: Megahertz is 1000000 hertz units, and millihertz is 0.001 hertz units.
Formula
millihertz = megahertz × 1000000000
This factor comes from each unit's defined relationship to the category's base unit: 1 megahertz equals 1000000 base units, and 1 millihertz equals 0.001 base units, so dividing one by the other gives the direct megahertz-to-millihertz factor of 1000000000.
Simple example
1 MHz × 1000000000 = 1,000,000,000 mHz
1 megahertz = 1,000,000,000 millihertz.
Real-world example
10 MHz × 1000000000 = 10,000,000,000 mHz
10 megahertz = 10,000,000,000 millihertz.
Conversion table
| Megahertz (MHz) | Millihertz (mHz) |
|---|---|
| 0.001 MHz | 1,000,000 mHz |
| 0.01 MHz | 10,000,000 mHz |
| 1 MHz | 1,000,000,000 mHz |
| 10 MHz | 10,000,000,000 mHz |
| 100 MHz | 100,000,000,000 mHz |
| 1,000 MHz | 1e+12 mHz |
Reverse conversion: Millihertz to Megahertz
1 mHz × 1e-9 = 1e-9 MHz
1 millihertz = 1e-9 megahertz.
megahertz = millihertz × 1e-9
For a page dedicated to this direction, see Millihertz to Megahertz.
Understanding the Megahertz (MHz)
Megahertz is 1000000 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 megahertz?
1 megahertz equals 1,000,000,000 millihertz, using the exact defined conversion factor rather than an estimate.
How do I convert megahertz to millihertz?
Multiply the megahertz value by 1000000000. The converter above does this instantly to whatever precision you set.
How do I convert millihertz back to megahertz?
Use the reverse factor: 1 millihertz equals 1e-9 megahertz. You can also use the swap control in the converter above to flip the direction instantly.
What is a megahertz?
Megahertz (MHz) is a unit of scientific units.
What is a millihertz?
Millihertz (mHz) is a unit of scientific units.
Is the megahertz to millihertz conversion exact?
Yes. Both megahertz and millihertz are defined by fixed standards rather than physical artifacts, so the factor of 1000000000 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.