Yoctohertz is 1e-24 hertz units.
Yoctohertz to Millihertz Converter — yHz to mHz
Convert Yoctohertz (yHz) to Millihertz (mHz) using the exact conversion factor (1 yoctohertz = 1e-21 millihertz). See the formula, worked examples, and conversion table.
Yoctohertz to Millihertz converter
Converter
Frequency Converter
Convert hertz, SI frequency prefixes, RPM, beats per minute, and angular frequency.
Context values
Some unit families need one extra value for a physically accurate result.
Millihertz is 0.001 hertz units.
Result = input x 1e-24 / 0.001.
Frequency uses hertz as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Yoctohertz to Millihertz
Yoctohertz and Millihertz both describe how fast something cycles or rotates, and the conversion is a routine part of reading a car tachometer or motor spec sheet against a scientific frequency figure. Specifically: Yoctohertz is 1e-24 hertz units, and millihertz is 0.001 hertz units.
Formula
millihertz = yoctohertz × 1e-21
This factor comes from each unit's defined relationship to the category's base unit: 1 yoctohertz equals 1e-24 base units, and 1 millihertz equals 0.001 base units, so dividing one by the other gives the direct yoctohertz-to-millihertz factor of 1e-21.
Simple example
1 yHz × 1e-21 = 1e-21 mHz
1 yoctohertz = 1e-21 millihertz.
Real-world example
1,000 yHz × 1e-21 = 1e-18 mHz
1,000 yoctohertz = 1e-18 millihertz.
Conversion table
| Yoctohertz (yHz) | Millihertz (mHz) |
|---|---|
| 60 yHz | 6e-20 mHz |
| 600 yHz | 6e-19 mHz |
| 1,000 yHz | 1e-18 mHz |
| 3,000 yHz | 3e-18 mHz |
| 6,000 yHz | 6e-18 mHz |
| 10,000 yHz | 1e-17 mHz |
Reverse conversion: Millihertz to Yoctohertz
1e-21 mHz × 1e+21 = 1 yHz
1e-21 millihertz = 1 yoctohertz.
yoctohertz = millihertz × 1e+21
For a page dedicated to this direction, see Millihertz to Yoctohertz.
Understanding the Yoctohertz (yHz)
Yoctohertz is 1e-24 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 yoctohertz?
1 yoctohertz equals 1e-21 millihertz, using the exact defined conversion factor rather than an estimate.
How do I convert yoctohertz to millihertz?
Multiply the yoctohertz value by 1e-21. The converter above does this instantly to whatever precision you set.
How do I convert millihertz back to yoctohertz?
Use the reverse factor: 1 millihertz equals 1e+21 yoctohertz. You can also use the swap control in the converter above to flip the direction instantly.
What is a yoctohertz?
Yoctohertz (yHz) is a unit of frequency.
What is a millihertz?
Millihertz (mHz) is a unit of frequency.
Is the yoctohertz to millihertz conversion exact?
Yes. Both yoctohertz and millihertz are defined by fixed standards rather than physical artifacts, so the factor of 1e-21 used above is exact to as many digits as you choose to display.