Frequency
Hztorpd
Convert hertz (Hz) to revolutions per day (rpd).
Factor1 Hz = 86400 rpd
Converter
Hz
Accepts numbers or expressions, e.g. 150 + 14.7
Result
rpd
Rendered to 6 significant figures.
Formula
Formula
rpd = Hz × 86400
Multiply any value in hertz by 86400 to obtain the value in revolutions per day.
Worked example
Convert 1 Hz to rpd.
- 01Start with 1 Hz.
- 02Multiply by the conversion factor: 1 × 86400 = 86400 rpd.
Result1 Hz = 86400 rpd
Conversion table
| Hz | rpd |
|---|---|
| 1 | 86400 |
| 2 | 1.7280e+5 |
| 5 | 4.3200e+5 |
| 10 | 8.6400e+5 |
| 20 | 1.7280e+6 |
| 50 | 4.3200e+6 |
| 100 | 8.6400e+6 |
| 200 | 1.728e+7 |
| 500 | 4.32e+7 |
| 1000 | 8.64e+7 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from Hz to rpd?
1 Hz equals 86400 rpd. To convert, multiply the value in hertz by 86400.
How do I convert 1 Hz to rpd?
1 Hz = 86400 rpd. For any value, multiply by 86400.
How do I convert rpd back to Hz?
Divide by the same factor — or equivalently, multiply by 1.157407e-5. So 1 rpd = 1.15741e-5 Hz.
When would I need to convert hertz to revolution per day?
Frequency conversions between Hz and rpd 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).