Frequency
kHztorph
Convert kilohertz (kHz) to revolutions per hour (rph).
Factor1 kHz = 3600000 rph
Converter
kHz
Accepts numbers or expressions, e.g. 150 + 14.7
Result
rph
Rendered to 6 significant figures.
Formula
Formula
rph = kHz × 3600000
Multiply any value in kilohertz by 3600000 to obtain the value in revolutions per hour.
Worked example
Convert 1 kHz to rph.
- 01Start with 1 kHz.
- 02Multiply by the conversion factor: 1 × 3600000 = 3.60000e+6 rph.
Result1 kHz = 3.60000e+6 rph
Conversion table
| kHz | rph |
|---|---|
| 1 | 3.6000e+6 |
| 2 | 7.2000e+6 |
| 5 | 1.8e+7 |
| 10 | 3.6e+7 |
| 20 | 7.2e+7 |
| 50 | 1.8e+8 |
| 100 | 3.6e+8 |
| 200 | 7.2e+8 |
| 500 | 1.8e+9 |
| 1000 | 3.6e+9 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from kHz to rph?
1 kHz equals 3600000 rph. To convert, multiply the value in kilohertz by 3600000.
How do I convert 1 kHz to rph?
1 kHz = 3.60000e+6 rph. For any value, multiply by 3600000.
How do I convert rph back to kHz?
Divide by the same factor — or equivalently, multiply by 2.777778e-7. So 1 rph = 2.77778e-7 kHz.
When would I need to convert kilohertz to revolution per hour?
Frequency conversions between kHz 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).