Frequency
mHztorph
Convert millihertz (mHz) to revolutions per hour (rph).
Factor1 mHz = 3.6 rph
Converter
mHz
Accepts numbers or expressions, e.g. 150 + 14.7
Result
rph
Rendered to 6 significant figures.
Formula
Formula
rph = mHz × 3.6
Multiply any value in millihertz by 3.6 to obtain the value in revolutions per hour.
Worked example
Convert 1000 mHz to rph.
- 01Start with 1000 mHz.
- 02Multiply by the conversion factor: 1000 × 3.6 = 3600 rph.
Result1000 mHz = 3600 rph
Conversion table
| mHz | rph |
|---|---|
| 1 | 3.6 |
| 2 | 7.2 |
| 5 | 18 |
| 10 | 36 |
| 20 | 72 |
| 50 | 180 |
| 100 | 360 |
| 200 | 720 |
| 500 | 1800 |
| 1000 | 3600 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mHz to rph?
1 mHz equals 3.6 rph. To convert, multiply the value in millihertz by 3.6.
How do I convert 1 mHz to rph?
1 mHz = 3.6 rph. For any value, multiply by 3.6.
How do I convert rph back to mHz?
Divide by the same factor — or equivalently, multiply by 0.2777778. So 1 rph = 0.277778 mHz.
When would I need to convert millihertz to revolution per hour?
Frequency conversions between mHz and rph 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).