Frequency
HztomHz
Convert hertz (Hz) to millihertz (mHz).
Factor1 Hz = 1000 mHz
Converter
Hz
Accepts numbers or expressions, e.g. 150 + 14.7
Result
mHz
Rendered to 6 significant figures.
Formula
Formula
mHz = Hz × 1000
Multiply any value in hertz by 1000 to obtain the value in millihertz.
Worked example
Convert 1 Hz to mHz.
- 01Start with 1 Hz.
- 02Multiply by the conversion factor: 1 × 1000 = 1000 mHz.
Result1 Hz = 1000 mHz
Conversion table
| Hz | mHz |
|---|---|
| 1 | 1000 |
| 2 | 2000 |
| 5 | 5000 |
| 10 | 10000 |
| 20 | 20000 |
| 50 | 50000 |
| 100 | 1.0000e+5 |
| 200 | 2.0000e+5 |
| 500 | 5.0000e+5 |
| 1000 | 1.0000e+6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from Hz to mHz?
1 Hz equals 1000 mHz. To convert, multiply the value in hertz by 1000.
How do I convert 1 Hz to mHz?
1 Hz = 1000 mHz. For any value, multiply by 1000.
How do I convert mHz back to Hz?
Divide by the same factor — or equivalently, multiply by 0.001. So 1 mHz = 0.001 Hz.
When would I need to convert hertz to millihertz?
Frequency conversions between Hz and mHz are needed in signal and RF engineering, motor and turbomachinery rotational-speed work, vibration and pulse-rate analysis, and control-loop sample-rate specification. Hz dominates electronics and instrumentation; kHz, MHz and GHz cover audio through microwave; rpm and rps dominate mechanical rotational equipment; cycles per minute, second and hour cover slow industrial cyclic processes. Angular frequency (rad/s) and time-period (Hz ↔ seconds) conversions are NOT included — they require either a 2π factor or a reciprocal relationship.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).