Frequency
Hztorph
Convert hertz (Hz) to revolutions per hour (rph).
Factor1 Hz = 3600 rph
Converter
Hz
Accepts numbers or expressions, e.g. 150 + 14.7
Result
rph
Rendered to 6 significant figures.
Formula
Formula
rph = Hz × 3600
Multiply any value in hertz by 3600 to obtain the value in revolutions per hour.
Worked example
Convert 1 Hz to rph.
- 01Start with 1 Hz.
- 02Multiply by the conversion factor: 1 × 3600 = 3600 rph.
Result1 Hz = 3600 rph
Conversion table
| Hz | rph |
|---|---|
| 1 | 3600 |
| 2 | 7200 |
| 5 | 18000 |
| 10 | 36000 |
| 20 | 72000 |
| 50 | 1.8000e+5 |
| 100 | 3.6000e+5 |
| 200 | 7.2000e+5 |
| 500 | 1.8000e+6 |
| 1000 | 3.6000e+6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from Hz to rph?
1 Hz equals 3600 rph. To convert, multiply the value in hertz by 3600.
How do I convert 1 Hz to rph?
1 Hz = 3600 rph. For any value, multiply by 3600.
How do I convert rph back to Hz?
Divide by the same factor — or equivalently, multiply by 0.0002777778. So 1 rph = 0.000277778 Hz.
When would I need to convert hertz to revolution per hour?
Frequency conversions between Hz 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).